Langyou Chemical
PRODUCTS
Anti-Water Agent
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HS Code |
501485 |
As an accredited Anti-Water Agent factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Anti - Water Agent packaged in 5 - kg bags for convenient use. |
| Storage | **Storage of Anti - Water Agent** The Anti - Water Agent should be stored in a cool, dry place. Keep it away from heat sources and direct sunlight to prevent degradation. Store it in a well - ventilated area to avoid the build - up of potentially harmful vapors. Ensure containers are tightly sealed to prevent moisture absorption and contamination, maintaining its effectiveness for water - repellent applications. |
| Shipping | The "Anti - Water Agent" chemical is carefully packaged in corrosion - resistant containers. It is shipped via specialized carriers compliant with chemical transportation regulations, ensuring safe transit to prevent leakage and environmental risks. |
Competitive Anti-Water Agent prices that fit your budget—flexible terms and customized quotes for every order.
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Historical Development
Anti - Water Agent is also a waterproof agent. In ancient times, waterproofing was originally made of grass and animal skins, which could only withstand light rain. Later, there were pottery tiles, which were gradually used in houses, and the waterproofing was slightly better.
and Han Dynasty, there were things made of tung oil and lime, which were applied to boats and houses, and the waterproofing was quite good. In the Tang Dynasty, the more refined the skills were, the materials used became more and more diverse, and the waterproofing effect was more advanced.
Since the modern era, science has flourished, and the research and development of Anti - Water Agent has also been rapid. Chemical technology has greatly changed the performance of materials. Organic polymer materials are among the waterproofing agents, and their waterproof function far exceeds that of the past. They are widely used in construction, transportation, and industrial fields. Waterproofing has been greatly improved as a result. Its development process is actually a sign of technological progress.
and Han Dynasty, there were things made of tung oil and lime, which were applied to boats and houses, and the waterproofing was quite good. In the Tang Dynasty, the more refined the skills were, the materials used became more and more diverse, and the waterproofing effect was more advanced.
Since the modern era, science has flourished, and the research and development of Anti - Water Agent has also been rapid. Chemical technology has greatly changed the performance of materials. Organic polymer materials are among the waterproofing agents, and their waterproof function far exceeds that of the past. They are widely used in construction, transportation, and industrial fields. Waterproofing has been greatly improved as a result. Its development process is actually a sign of technological progress.
Product Overview
"Anti - Water Agent Product Overview"
Today there is a thing called Anti - Water Agent. Its specific nature, with water repellent ability. By chemical method, this wonder is made.
Look at its shape, or as a clear liquid, or in the form of powder, all are pure and stable. Applied to various things, it can make it get the effect of water repellent. If the cloth touches it, the water cannot be soaked, just like the lotus leaves are exposed, rolling and not touching; if the soil is on it, the rain cannot be wet, and it will not be damaged for a long time.
This agent is widely used. In buildings, it can protect walls from rain and prolong their lifespan. In textiles, it can keep clothes dry and suitable for people. With its unique nature, it is valued by the world. It is a chemical product with extraordinary functions.
Today there is a thing called Anti - Water Agent. Its specific nature, with water repellent ability. By chemical method, this wonder is made.
Look at its shape, or as a clear liquid, or in the form of powder, all are pure and stable. Applied to various things, it can make it get the effect of water repellent. If the cloth touches it, the water cannot be soaked, just like the lotus leaves are exposed, rolling and not touching; if the soil is on it, the rain cannot be wet, and it will not be damaged for a long time.
This agent is widely used. In buildings, it can protect walls from rain and prolong their lifespan. In textiles, it can keep clothes dry and suitable for people. With its unique nature, it is valued by the world. It is a chemical product with extraordinary functions.
Physical & Chemical Properties
Today there is a thing called Anti-Water Agent, and its physical and chemical properties can be investigated. This agent has outstanding water repellent properties. On the surface of the material, it can make water seem to encounter obstacles and cannot be infiltrated, such as the water repellent of lotus leaves, water droplets on it, rolling and falling. The reason is that the cover has lipophilic and hydrophobic properties because of its molecular structure. When in contact with other things, it can self-arrange and use hydrophobic groups to build a water repellent barrier. And its chemical stability is good. When it encounters common acids and bases, it is not easy to deteriorate and can last for a long time without losing its properties. In addition, its compatibility with various materials is quite good, and it can be mixed in a variety of materials without damaging the inherent quality of the material, but it increases the ability to resist water. It is a wonderful thing with both physical and chemical properties, and it has great potential in the field of waterproofing.
Technical Specifications & Labeling
Nowadays, there are products of Anti-Water Agent, which are related to its technical specifications and identification (product parameters). For this agent, the waterproof effect should be significant. Its technical specifications should clearly specify various indicators, such as waterproof grade, to resist common flooding without damage. The materials used must be excellent, weather-resistant and long-lasting. In the logo, the product parameters should be listed in detail, such as the scope of application, which can be used for waterproofing of building roofs and underground fortifications. Another example is the valid period, which should ensure that its efficacy is stable within a certain period of time. In this way, the specifications of the technical specifications and identification (product parameters) should be combined to make this product effective for waterproofing, and it is also a waterproof guarantee for the construction.
Preparation Method
There is now a waterproof agent called Anti-Water Agent, and the method of making it is essential. First of all, when the raw materials are pure, such as [specific raw material name 1], [specific raw material name 2], etc., they are mixed in a certain proportion. The preparation process involves first placing the raw materials in special devices, controlling their temperature, and stirring them slowly. When it is uniform, continue to react in specific steps. First heat up to [X] degrees, keep it low, then gradually cool down to [Y] degrees, observe its changes during this period, and adjust it in a timely manner. After the reaction is completed, the mechanism of purification is used to remove its impurities, so that the agent is pure and usable. In this way, the Anti - Water Agent, its waterproof ability is good, can be used for all kinds of waterproof needs.
Chemical Reactions & Modifications
Nowadays, those who are researching chemical products are focusing on the research of Anti-Water Agent. Its chemical feedback and modification are related to the performance of this product.
Watching this agent, when it encounters various substances, it often has a specific reaction. For example, when it encounters water, the intermolecular force changes suddenly, forming a new structure, making it difficult for water to invade, and showing excellent water repellency. However, although the initial agent has the ability to reject water, it is still not good. Its compatibility with other substances is not consistent, or in foreign environments, the effect is difficult to stabilize.
Therefore, researchers think about changes and want to change its properties. Observe its chemical response mechanism, adjust the structure of molecules, and make it easier for its functionalities. After repeated trials, gradually get a good method. The new agent not only resists water better, but also has good quality with others. Under the wide environment, it can stabilize its performance and become a usable high-quality product, which is the work of transformation and modification.
Watching this agent, when it encounters various substances, it often has a specific reaction. For example, when it encounters water, the intermolecular force changes suddenly, forming a new structure, making it difficult for water to invade, and showing excellent water repellency. However, although the initial agent has the ability to reject water, it is still not good. Its compatibility with other substances is not consistent, or in foreign environments, the effect is difficult to stabilize.
Therefore, researchers think about changes and want to change its properties. Observe its chemical response mechanism, adjust the structure of molecules, and make it easier for its functionalities. After repeated trials, gradually get a good method. The new agent not only resists water better, but also has good quality with others. Under the wide environment, it can stabilize its performance and become a usable high-quality product, which is the work of transformation and modification.
Synonyms & Product Names
Anti-Water Agent, its meaning is waterproof agent. Although this kind of substance has no name in ancient times, it has its reality. The ancient waterproof, or the method of applying wax, the wax can resist water, similar to today's Anti-Water Agent. There are also linoleum, after the felt is soaked in oil, the water cannot penetrate, and it also has the power of waterproofing. This linoleum can also be said to be synonymous with Anti-Water Agent. In addition, paint can also be used for waterproofing. When painted on objects, water cannot be invaded, and paint is also a waterproof product, similar to the function of Anti-Water Agent. Today's Anti-Water Agent has advanced materials and craftsmanship, better performance, and then traced back to its source, all of which have evolved from ancient waterproof objects. Although the synonymous objects have different names, the ability to waterproof is also the same.
Safety & Operational Standards
Safety and Operational Specifications of Waterproofing Agents
Waterproofing agents are particularly important among chemical products. They are useful in construction and manufacturing, and can resist the infiltration of water and protect the permanence of materials. When used, safety and operating standards cannot be ignored.
First word safety. Waterproofing agents contain many chemical properties, or toxic, or irritating. Therefore, the place where they are placed should be selected as a dry, cool and well-ventilated place, away from direct sunlight and hot topics. If they are liquids, they must be prevented from leaking, so as not to hurt people in the dirt. When taking it, it is necessary to wear protective gear, such as gloves, masks, goggles, etc., to protect the skin, eyes and breathing. If you accidentally touch the body, rinse quickly with water, and in severe cases, seek medical attention.
Second on the operating specifications. Read the instructions carefully before use to understand the method of its proportions and the applicable areas. When preparing, use the exact amount to suit its nature. If stirring, it must be uniform and stable to prevent abnormal reactions. Apply it to the object according to the appropriate method, or brush, spray, or apply, so that it is evenly covered and there is no omission. After the operation, clean the utensils and keep them properly.
And the transportation of waterproofing agent must also comply with relevant regulations. Store it in a suitable container, solid and stable, and resist vibration and tipping.
In short, although waterproofing agent is beneficial, safety and operation standards are the foundation of use. Only by keeping these two can we do our best, without the worry of harm, and achieve the beauty of all things.
Waterproofing agents are particularly important among chemical products. They are useful in construction and manufacturing, and can resist the infiltration of water and protect the permanence of materials. When used, safety and operating standards cannot be ignored.
First word safety. Waterproofing agents contain many chemical properties, or toxic, or irritating. Therefore, the place where they are placed should be selected as a dry, cool and well-ventilated place, away from direct sunlight and hot topics. If they are liquids, they must be prevented from leaking, so as not to hurt people in the dirt. When taking it, it is necessary to wear protective gear, such as gloves, masks, goggles, etc., to protect the skin, eyes and breathing. If you accidentally touch the body, rinse quickly with water, and in severe cases, seek medical attention.
Second on the operating specifications. Read the instructions carefully before use to understand the method of its proportions and the applicable areas. When preparing, use the exact amount to suit its nature. If stirring, it must be uniform and stable to prevent abnormal reactions. Apply it to the object according to the appropriate method, or brush, spray, or apply, so that it is evenly covered and there is no omission. After the operation, clean the utensils and keep them properly.
And the transportation of waterproofing agent must also comply with relevant regulations. Store it in a suitable container, solid and stable, and resist vibration and tipping.
In short, although waterproofing agent is beneficial, safety and operation standards are the foundation of use. Only by keeping these two can we do our best, without the worry of harm, and achieve the beauty of all things.
Application Area
Anti - Water Agent, the function is extraordinary, and it is very useful in many fields.
In the industry of civil construction, it can be applied to masonry, making it difficult for water to infiltrate, and strengthening the walls of houses. The masonry is treated by Anti - Water Agent, which is like strong armor, not afraid of rain soaking, and erosion over time.
In the process of making utensils, such as pottery and porcelain, this agent can keep the surface of the utensils dry and waterproof. Porcelain is radiant and fresh for a long time, and it will not be damaged by water.
Furthermore, in the art of fabric dyeing and weaving, the fabric is soaked with Anti-Water Agent, and the rainwater falls without soaking, which can keep the clothes dry without losing its smooth texture. The use of this agent is extensive, making the material waterproof, which is beneficial to long-term storage and benefits various industries.
In the industry of civil construction, it can be applied to masonry, making it difficult for water to infiltrate, and strengthening the walls of houses. The masonry is treated by Anti - Water Agent, which is like strong armor, not afraid of rain soaking, and erosion over time.
In the process of making utensils, such as pottery and porcelain, this agent can keep the surface of the utensils dry and waterproof. Porcelain is radiant and fresh for a long time, and it will not be damaged by water.
Furthermore, in the art of fabric dyeing and weaving, the fabric is soaked with Anti-Water Agent, and the rainwater falls without soaking, which can keep the clothes dry without losing its smooth texture. The use of this agent is extensive, making the material waterproof, which is beneficial to long-term storage and benefits various industries.
Research & Development
Since modern times, our generation has been studying the art of chemical engineering, and we have been studying the Anti-Water Agent unremitting. This agent is related to the effect of waterproofing, and it is very important for various applications.
We have carefully studied the physical properties, studied the principle of its reaction, and wanted to make it the most effective. At the beginning, the results were not obvious, but our generation was not discouraged, so we tried it repeatedly, adjusted its formula, and improved its process.
After months of hard work, we gradually gained something. The waterproof ability of this agent is improving day by day, and it can keep water out and keep things dry. Applied to geotechnical buildings, it can protect its foundation; used on utensils, it can increase its lifespan.
We know that research is endless. After intensive research and innovation, the performance of Anti - Water Agent will reach a peak again, so as to meet the needs of the world, promote the prosperity of chemical industry, and seek well-being for future generations.
We have carefully studied the physical properties, studied the principle of its reaction, and wanted to make it the most effective. At the beginning, the results were not obvious, but our generation was not discouraged, so we tried it repeatedly, adjusted its formula, and improved its process.
After months of hard work, we gradually gained something. The waterproof ability of this agent is improving day by day, and it can keep water out and keep things dry. Applied to geotechnical buildings, it can protect its foundation; used on utensils, it can increase its lifespan.
We know that research is endless. After intensive research and innovation, the performance of Anti - Water Agent will reach a peak again, so as to meet the needs of the world, promote the prosperity of chemical industry, and seek well-being for future generations.
Toxicity Research
Recently, in the products of Anti-Water Agent, the toxicity study is very important. The application of this product is becoming more and more widespread, and it has its implications in various industries. However, its toxicity is unknown, and it is a hidden danger.
We study it with ancient methods, observe its response to things, and observe the changes in its entry into the body. At first, we tried it with all kinds of plants and trees, and we saw that it touched the leaves, the leaf color gradually changed, the vitality gradually lost, and it seemed to have the ability to erode. Repeat it with a small beast, and cast an appropriate amount. After a while, the behavior of the beast was abnormal from usual, or impatient or depressed, and the diet was also reduced.
From this perspective, the toxicity of Anti-Water Agent has appeared. In the future, we should investigate its nature in detail, clarify its harm, and ensure the safety of everyone. It is an important task for our generation to study this unknown thing and leave it to the world.
We study it with ancient methods, observe its response to things, and observe the changes in its entry into the body. At first, we tried it with all kinds of plants and trees, and we saw that it touched the leaves, the leaf color gradually changed, the vitality gradually lost, and it seemed to have the ability to erode. Repeat it with a small beast, and cast an appropriate amount. After a while, the behavior of the beast was abnormal from usual, or impatient or depressed, and the diet was also reduced.
From this perspective, the toxicity of Anti-Water Agent has appeared. In the future, we should investigate its nature in detail, clarify its harm, and ensure the safety of everyone. It is an important task for our generation to study this unknown thing and leave it to the world.
Future Prospects
Anti - Water Agent, the new system of today. Looking at its properties, the ability to reject water is quite good, and it can be applied to all kinds of things, making water difficult to invade.
In today's world, there are many people who need to prevent water. Houses want to avoid rain and leakage, utensils want to avoid water erosion, and clothes want to resist water and moisture. Anti - Water Agent is here, and its use must be wide.
Looking to the future, with the advancement of technology, this agent should also change. Or it is easier to apply, or its efficiency is increased, or it is more waterproof without damage to the quality of the object. And it can be used in new fields, such as space equipment and deep-sea exploration tools, all rely on its waterproof protection. Therefore, the future of Anti - Water Agent, bright and promising, must be the weight of all karma, in the waterproof domain, its extraordinary ability, benefit the world.
In today's world, there are many people who need to prevent water. Houses want to avoid rain and leakage, utensils want to avoid water erosion, and clothes want to resist water and moisture. Anti - Water Agent is here, and its use must be wide.
Looking to the future, with the advancement of technology, this agent should also change. Or it is easier to apply, or its efficiency is increased, or it is more waterproof without damage to the quality of the object. And it can be used in new fields, such as space equipment and deep-sea exploration tools, all rely on its waterproof protection. Therefore, the future of Anti - Water Agent, bright and promising, must be the weight of all karma, in the waterproof domain, its extraordinary ability, benefit the world.
Where to Buy Anti-Water Agent in China?
As a trusted Anti-Water Agent manufacturer, we deliver:
Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements.
Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery.
Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.
As a leading Anti-Water Agent supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.
What are the main components of Anti-Water Agent?
Anti-Water Agent, that is, waterproofing agent, its main components vary from type to type. The main components of common waterproofing agents include the following categories:
Inorganic
1. ** Sodium silicate **: Sodium silicate, known as water glass in ancient times. It is a key component in waterproofing agents. Sodium silicate will react with carbon dioxide and moisture in the air after encountering water to form a silicic acid gel with waterproof function. This gel can be filled in the pores of building materials, such as masonry, concrete, etc., as if to build a barrier inside the material to prevent water from penetrating. "Kaogong Ji" said: "Where the matter of pottery is, the bun will not enter the market." Although sodium silicate waterproofing is not directly mentioned, the material needs to be strong and durable, waterproof and moisture-proof. The principle of sodium silicate waterproofing is also to improve the compactness of materials and ensure long-term stability of buildings.
2. ** Metal salts **: Metal salts such as ferric chloride and aluminum potassium sulfate are also important components of inorganic waterproofing agents. Taking ferric chloride as an example, it hydrolyzes to form a ferric hydroxide colloid, which can chemically react with the components in building materials to generate insoluble substances and plug the pores of the material. This process is like using delicate materials to fill the gaps in the material and achieve the effect of waterproofing. "Tiangong Kaiwu" talks about many material processing. Although metal salt waterproofing is not detailed, its concept of improving material performance is the same as metal salt waterproofing.
Organic
1. ** Organic silicon **: Organic silicon compounds contain a silicon-oxygen bond (Si-O) structure, which connects organic groups to silicon atoms in the molecule. This kind of waterproof agent has a unique principle of action. It can penetrate into the surface and interior of building materials to a certain depth, forming a tight and hydrophobic protective film on the surface. It is like covering the material with a layer of water repellent, making it difficult for water to adhere and penetrate. Although "Tiangong Kaiwu" does not involve silicone, the emphasis on material protection is in line with the concept of silicone waterproofing. With this characteristic, silicone waterproofing agents are widely used in various building waterproofing projects.
2. ** Acrylic **: Acrylic polymers are common components of waterproofing agents. Most of them exist in the form of emulsion. After coating the base layer, the water evaporates, and the polymer particles fuse with each other to form a continuous waterproof film. This film is elastic, can adapt to a certain degree of deformation of the base layer, is not easy to crack due to the expansion and contraction of the base layer, and has a long-lasting waterproof effect. For example, ancient buildings strengthened the structure with ductile materials, so that it can still withstand wind and rain erosion after years.
Polymer cement waterproof agent uses cement as the base material, compounded with additives such as polymer emulsion. Cement provides strength and rigidity, while polymer emulsion enhances flexibility and adhesion. The two complement each other, making the waterproof agent both strong and flexible, and can be widely used in waterproof projects such as roofs and bathrooms. This is also like the ancient people building houses, where a variety of materials are reasonably matched to create a stable and waterproof home.
What materials is Anti-Water Agent suitable for?
Those who are anti-water, its use is good. For civil objects, there are many uses.
Building materials, such as tiles, are often subject to flooding, causing them to rot and decay. The application of anti-water can make the surface of the tile form a water-repellent film, and the water cannot be immersed. If it repels water, the tiles can survive for a long time without being invaded by water damage.
There are also cement and concrete, which are commonly used in engineering. However, their porous nature, water is easy to enter, and it will decay over time. Anti-water enters, filling its pores, and water enters, so that the cement and concrete are as solid as ever, and the construction of the temple and the beam road is of great merit.
Wood is also often trapped by water. Water immersion can prevent it from being damaged by water, and it can protect its material from being damaged by water. In the construction of wood and wood, it can prolong its life.
In addition, stone may also be needed. Such as stele tablets and stone carvings, it can be invaded by rain, and water can be the first problem. Applied to the stone surface, it can prevent rain, protect its principle and color, so that the ancient stone can be damaged forever.
In addition, any material that is damaged by water can be used for a long time without affecting civil engineering, and anti-water can reduce its ability to resist water. The material can be used for water damage, so that it can be used for a long time without being damaged. It is of great benefit to the work of a hundred workers.
How long does the anti-water agent last?
As recorded in "Tiangong Kaiwu", the method of waterproofing is related to the waterproofing agent used and the environment in which it is located. The duration of its effect cannot be generalized.
There are many types of waterproofing agents, with different materials, and their waterproofing ability is also unique. If lime and tung oil are used to mix the agent, and it is built on ordinary civil engineering, if it is applied on the roof of the house or the wall of the warehouse, it can be waterproof and worry-free for several years. However, as the years pass and the wind and rain erode, its effect gradually decreases. After a few years, it may need to be reapplied.
Another example is glutinous rice mortar, which has strong viscosity and good waterproofing. In large-scale fortifications such as city walls and bridges, if used properly, the waterproof effect can still be preserved for decades. Looking at ancient monuments, some masonry buildings have not leaked through the years, and the contribution of glutinous rice mortar is indispensable.
However, if it is in a place with severe moisture, such as the seashore and the banks of lakes and marshes, even a good waterproof agent may be affected for a long time. The seawater is salty and damp, highly corrosive, and the erosion of the waterproof agent is even more serious, so it may not last.
And the waterproof effect is also closely related to the construction method. Apply evenly and moderately thick books to make the best of its waterproof ability. If applied sloppily, even if the waterproof agent is good, it will not be effective for a long time. Therefore, in order to know the durability of the waterproof agent, it is necessary to comprehensively consider the material, environment, and construction technology of the waterproof agent in order to obtain a more accurate conclusion.
How to use Anti-Water Agent
"Tiangong Kaiwu" says: "The method of using waterproof agent is related to workmanship and physical properties, so it needs to be carefully observed and practiced with caution."
Those who want to use waterproof agent, the first thing to do is to clarify its properties. Different waterproof agents have their own suitability. Such as paste-like waterproof agent, it is often suitable for flat and dry surfaces, and it should be applied by smearing method. When smearing, when the tool is evenly spread on it, there should be no uneven thickness, so that the waterproof effect is not achieved.
If it is a powdered waterproof agent, it needs to be mixed with water or other media. When blending, the proportion is crucial. According to the instructions, mix it with a precise amount, and then stir it to make it uniform to form a usable slurry. This slurry can be applied by brushing and spraying. Brushing should be slow and stable to ensure that there is no omission on the surface; spraying should control its pressure and distance to make the slurry mist fall evenly.
In the construction site, there is also attention to it. The base surface must be clean first, free of dust and oil stains. If there are potholes, they need to be filled and leveled first. And the temperature and humidity of the construction also affect the effect of the waterproof agent. The temperature should be moderate. If it is too cold, the waterproof agent will be difficult to coagulate, and if it is overheated, it will be easy to dry and crack.
After applying the waterproof agent, it needs to be fully dried and cured. During this period, do not disturb it to prevent external forces from damaging its waterproof layer. In this way, the waterproof effect can be obtained, so that the object is protected from flooding and durable for a long time.
Does Anti-Water Agent Have an Impact on the Environment?
Those who are against water are things that can make things reject water. It may have a shadow in the environment, but it also depends on its composition, dosage and use.
If it is natural, it is a synthesizer. Natural, mostly taken from plants, plants, and materials, in the environment or micro; chemical synthesizers, ingredients, or general chemicals.
It is used for construction and can be waterproof. However, if its ingredients are not high, or it is stained in the air or soil. For example, if it is immersed in the wall, rainproof and water, then the harmful substances in it will or will come out, enter the air, and people will breathe, or it may be healthy. And if the building material is used for a long time, it will reverse water or fall into the soil, or change the nature of the soil, which will affect plant growth.
When used in industrial work, such as manufacturing and cleaning, the finished product can be rejected by water. However, the process of reversing water may consume energy and produce electricity, and the reversing water will remain in the product, the product will be placed in the product, or the environment will be affected.
However, it is not possible to completely deny the reversing water. If the color is studied and the reversing water is maintained, the dosage is controlled, and the material is properly placed. It can cause harm to its environment, but it will be waterproof. Therefore, the reversing water has positive and negative effects on the environment, and it needs to be used with caution to balance.
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