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As a procurement professional in the construction or industrial sector, you know that sourcing reliable waterproof solutions is critical to delivering high-quality projects while maximizing your clients’ ROI.
In today’s global market, waterproof paint isn’t just a protective coating—it’s a strategic asset that can differentiate your product line, enhance customer satisfaction, and future-proof your supply chain.
Different waterproof paints have different characteristics and advantages.
Understanding these can help you select the most suitable waterproof paint according to specific usage scenarios and requirements.
For example, the paint used for waterproofing in bathrooms needs to have good water resistance and mold resistance, while the waterproof paint used for exterior walls needs to have properties such as UV resistance and weather resistance.
At the same time, choosing the right waterproof paint can achieve good waterproof effects with just one construction, avoiding repeated repairs and replacements caused by poor waterproof performance, thus saving time and money costs.
This is the main function of waterproof paint. It can form a continuous and dense protective film on the surface of objects, effectively preventing water penetration.
Whether it is dealing with the erosion of rainwater, domestic water, or groundwater, it can play a good protective role and protect the internal structure of buildings or objects from the damage of water.
Waterproof paint has good adhesion to various base materials, such as concrete, masonry, wood, metal, etc. It can firmly adhere to the surface of objects and is not easy to fall off.
Even if there are small cracks in the base, it can maintain the integrity of the waterproof membrane and continue to exert the waterproof effect.
It has properties such as UV resistance, aging resistance, and resistance to high and low temperatures.
In the long-term outdoor environment, it can withstand the tests of natural conditions such as sunlight exposure, wind and rain, and extreme cold and heat, and is not prone to phenomena such as cracking, powdering, and fading, with a relatively long service life.
With the development of technology, many waterproof paints now use environmentally friendly raw materials, which are non-toxic and odorless.
They will not cause harm to human health and the environment during the construction and use processes, meeting the requirements of modern environmental protection concepts and relevant standards.
There are various construction methods for waterproof paint, such as brushing, spraying, and roller coating.
The operation is simple and the construction efficiency is high. Moreover, it can be constructed on a wet base, which has great advantages for some emergency waterproof projects or construction environments that are difficult to dry.
In addition to waterproofing, it can also prevent the erosion of chemical substances such as acids and alkalis on the base to a certain extent, protect the structure of objects, and improve the durability of buildings or objects.
It is especially suitable for some harsh environments, such as chemical workshops and sewage treatment tanks.
Although the price of waterproof paint varies according to different brands, qualities and functions.
In the long run, it can effectively prevent water hazards and reduce the costs of repairs and replacements caused by leaks, so its comprehensive cost performance will be very high.
There are various types of waterproof paints, and the common ones are as follows:
1.1 Main components
It is prepared by using pure acrylate copolymer or pure propionate emulsion as the main film-forming substance and adding appropriate fillers, additives, etc.
1.2 Characteristics
It has good weather resistance, water resistance and UV resistance.
It dries quickly and is convenient for construction. It can be constructed on wet substrates.
The coating has certain elasticity and can adapt to slight deformation of the substrate.
1.3Application scenarios
It is widely used in waterproof projects such as roofs, walls, bathrooms, basements, etc.,
Especially suitable for the waterproofing of building exterior walls with high requirements for weather resistance and environmental protection.
2.1 Main components
It is made by using isocyanate, polyether, etc. as the main raw materials, making a prepolymer through addition polymerization reaction, and then adding catalysts, additives, etc. for mixing.
2.2 Characteristics
It has excellent elasticity and tensile strength and can adapt to large deformation of the substrate.
It has good waterproof performance, strong water resistance and chemical corrosion resistance.
The coating is dense, seamless and has good integrity.
2.3 Application scenarios
It is commonly used in waterproof projects such as basements, pools, tunnels, roofs, etc.,
Especially suitable for parts with high waterproof performance requirements and large substrate deformation.
3.1Main components
It is prepared by using epoxy resin as the main film-forming substance and adding curing agents, fillers, additives, etc.
3.2Characteristics
It has good adhesion and can firmly bond with a variety of substrates; it has excellent water resistance, chemical corrosion resistance, high strength and good wear resistance.
3.3Application scenarios
It is suitable for places with high requirements for waterproofing and anti-corrosion such as basements, pools, chemical workshops, etc., and can also be used for the protection of substrates such as metals and concretes.
4.1 Main components
It is made by using silicone rubber as the main film-forming substance and adding appropriate additives and fillers.
4.2Characteristics
It has excellent weather resistance and resistance to high and low temperatures and can maintain good performance under extreme climatic conditions.
It has good elasticity and can adapt to the expansion and contraction deformation of the substrate
It has excellent waterproof performance and good air permeability.
4.3Application scenarios
It is commonly used in waterproof projects such as roofs, exterior walls, bridges, etc., especially suitable for parts with high requirements for weather resistance and elasticity, such as the waterproofing of exterior walls of high-rise buildings.
5.1 Main components
It is a powdery material composed of portland cement, quartz sand, special active chemical substances, etc., and forms a cement-based penetrating crystalline waterproof coating after being mixed with water.
5.2 Characteristics
It has unique penetrating and crystalline properties, can penetrate into the interior of the concrete to form water-insoluble crystals, block the capillary pores, and play a permanent waterproof role.
It has good chemical corrosion resistance and can resist a certain degree of acid and alkali erosion.
It can be constructed on wet substrates and has low requirements for the moisture content of the substrate.
5.3Application scenarios
It is suitable for waterproof projects of concrete structures such as basements, tunnels, pools, dams, etc.,
Especially for projects with high requirements for waterproof durability.
6.1 Main components
It is made by using chloroprene rubber as the main film-forming substance and adding plasticizers, stabilizers, fillers, etc.
6.2 Characteristics
It has good water resistance, weather resistance and chemical corrosion resistance.
It has good elasticity and can adapt to the deformation of the substrate; it has strong adhesion and can firmly bond with a variety of substrates.
6.3 Application scenarios
It is commonly used in waterproof projects such as roofs, walls, basements, etc., and can also be used for the waterproof protection of pipelines, bridges, etc.
Waterproof paint can be used on a variety of materials, mainly including the following:
It is widely used on concrete surfaces such as roofs, basements, tunnels, and water tanks.
Concrete has pores and capillary channels through which water can seep.
Waterproof paint forms a protective film on the concrete surface, preventing water from penetrating and enhancing the durability of the concrete structure.
For example, in the waterproofing project of a basement, waterproof paint can effectively prevent groundwater from seeping into the basement and causing damage to the internal environment and facilities.
Commonly used on exterior walls, interior walls, and retaining walls made of brick and masonry.
These materials have certain porosity, and waterproof paint can fill the pores and form a waterproof layer to prevent rainwater and groundwater from infiltrating, thus protecting the integrity and stability of the brick - masonry structure.
For instance, in some old buildings, waterproof paint is applied to the exterior walls to solve the problem of water seepage on the walls, improving the living environment.
Applicable to metal surfaces such as roofs, water pipes, and steel structures. Metal is prone to rust and corrosion when exposed to water and air. Waterproof paint can isolate the metal from the external environment, preventing water and oxygen from coming into contact with the metal surface, thereby prolonging the service life of the metal. For example, waterproof paint is often used on metal roofs of industrial plants to prevent rainwater from corroding the metal roof and causing leaks.
Can be used on wooden structures such as decks, wooden houses, and wooden furniture.
Wood is susceptible to water damage, which can lead to deformation, mildew, and rot.
Waterproof paint forms a waterproof film on the wood surface, protecting the wood from the adverse effects of water and enhancing its durability.
For example, when building a wooden deck by the sea, waterproof paint is applied to the wood to resist the erosion of seawater and humid air.
Used on the surface of ceramic tiles in bathrooms, kitchens, and swimming pools.
Although ceramic tiles themselves have a certain degree of water resistance, the joints between the tiles are vulnerable to water seepage.
Waterproof paint can be used to seal the joints and gaps, enhancing the overall waterproof performance of the tiled surface.
For example, in a bathroom, waterproof paint is applied to the joints of the tiles to prevent water from seeping into the wall and floor, causing damage to the underlying structure.
Single-Component Coatings (e.g., Water-Based Acrylic): Ready to use straight from the can, no mixing required, suitable for emergency repairs or small-scale application.
Even beginners can handle it.
Multi-Component Coatings (e.g., Two-Part Polyurethane): Requires mixing according to specific ratios (e.g., Part A : Part B = 2:1), needs professional application, but provides stronger waterproofing performance after curing, ideal for large projects.
Supports application via brush, roller, and spray:
Spraying (e.g., Airless Sprayer): High efficiency, suitable for large surface areas (like roofs), but requires specialized equipment.
Brushing / Rolling: Suitable for complex details (like inside and outside corners, pipe penetrations), readily available tools, low cost.
Cleaning Convenience: Water-based coatings allow for tool cleanup with water. Solvent-based coatings require specific solvents (like xylene), which are more expensive but result in faster drying.
Touch Dry Time
Fast-Drying Coatings (e.g., UV-Cured Coatings): Touch dry in ≤ 1 hour, can shorten project timelines, suitable for rush jobs.
Conventional Coatings (e.g., Acrylic): Require 2-4 hours to touch dry, need to avoid water or dust contamination after application.
Full Cure Cycle
At room temperature (77°F / 25°C), polyurethane coatings require 24 hours for full cure, cementitious coatings require 7 days.
Low temperatures (e.g., below 41°F / 5°C) will extend the cure time, requiring the addition of accelerators or the selection of low-temperature specific formulations.
Temperature / Humidity Range
Water-Based Coatings: Suitable for 41-95°F (5-35°C), humidity ≤ 85%. Low temperatures can cause freezing and failure, while high temperatures can accelerate drying, leading to cracking.
Solvent-Based Coatings: Can be applied at temperatures as low as 14°F (-10°C), but require fire safety precautions and good ventilation, suitable for outdoor work in winter.
Cementitious Capillary Crystalline Coatings: Can be applied on damp substrates with a moisture content ≤ 10%, sealing capillaries through osmotic crystallization, suitable for damp environments like basements.
Headquartered in Chengdu’s Xindu Industrial Zone with a registered capital of 20 million RMB, the company has continuously upgraded its production capacity since 2008.
Key milestones include expanding workshops in 2015 and relocating to a new factory in 2018, outfitted with advanced equipment to ensure stable annual output.
Standardized production processes, combined with automated systems like automatic filling lines, enable end-to-end monitoring—from raw material intake to finished product delivery.
This ensures consistent quality and the ability to fulfill large-scale orders for clients in 60+ countries worldwide.
We’ve built a diversified procurement network, signing long-term agreements with top domestic and international suppliers of resins, pigments, and other materials to minimize single-source risks.
An intelligent inventory management system dynamically stocks core materials like acrylic resins and eco-friendly additives based on market forecasts, safeguarding against price volatility and supply disruptions to maintain uninterrupted production.
Our professional technical team leads formula development, strictly adhering to the ISO 9001 quality management system.
Every product batch undergoes comprehensive lab testing for waterproof performance, weather resistance, VOC content, and other parameters, ensuring compliance with international standards such as EU REACH and China’s GB 18582.
In today’s highly competitive market, the stability of waterproof paint supply chains plays a decisive role in a company’s sustainable development and its ability to meet customer needs.
As a key player in the industry, Sanyo Coatings demonstrates multiple strengths in ensuring the stability of its waterproof paint supply chain.
Chengdu Sanyo New Material Technology Co., Ltd. is located in the East District of Chengdu Xindu Industrial Zone, with a registered capital of 20 million yuan.
After years of development, it has grown to a significant scale, equipped with advanced and complete production facilities that strongly support the stable production of waterproof paints.
Since its establishment in 2008, the company has continuously expanded its production capacity: it undertook a major workshop expansion in 2015 and relocated to a new factory in 2018, further enhancing its output.
These measures ensure the company can timely supply waterproof paint products even amid fluctuations in market demand.
Sanyo Coatings has established a diverse and reliable raw material procurement network, forming long-term, stable partnerships with many high-quality suppliers.
For core materials like resins and pigments, Sanyo has entered strategic collaborations with multiple domestic and international suppliers, avoiding over-reliance on any single source.
This approach effectively reduces the risk of raw material supply disruptions caused by issues with individual suppliers.
Additionally, the company uses an advanced inventory management system to precisely monitor and control raw material stocks.
Based on historical production data and market demand forecasts, it pre-stocks appropriate quantities of raw materials to mitigate potential price volatility, supply shortages, and other challenges in the raw material market.
