NWT316 JS Polymer-Cement Waterproofing Coating

This product is a two-component, water-based waterproof coating made primarily from polymer emulsion and cement, with the addition of sand and other additives. As the polymer emulsion loses water, it forms a cohesive, continuous, elastic film, while the cement absorbs the water in the coating to form a flexible, elastic coating that exhibits excellent compatibility with the substrate, resulting in a coating that combines both rigidity and flexibility.

Product Categories

They are classified into Type I, Type II, and Type III based on their physical properties.

Code Marker

Label in the order of product name, model number, and standard number.

Example: Type I polymer-modified cementitious waterproofing coating is labeled as:

JS Waterproof Coating I GB/T 23445-2009

Product Features

• Non-toxic and odorless, this eco-friendly product can be used for waterproofing environmental protection facilities such as water supply reservoirs;
• The coating is highly elastic, strong, and tough, and has good water resistance;
• It can be applied directly to damp substrates (provided there is no standing water), dry substrates, and a variety of surface materials;
• It has strong adhesion and forms a good bond with substrates such as concrete, metal, and wood, as well as with other waterproofing layers;
• It has high bond strength and does not run when applied to vertical, sloped, or overhead surfaces;
• It is safe and easy to apply, requires little time to complete, and can be mixed with various pigments to create a wide range of colored coatings.

Construction Methods

• Process Flow

Cleaning the Base

Ingredients

Apply the primer; apply multiple coats of the waterproofing layer

Sealing of Joints; Cleaning, Inspection, and Acceptance; Waterproofing Protective Layer

• Key Construction Points

Substrate Requirements: The substrate must be level and dry; any low spots or protrusions must be leveled. No sanding or cracking is permitted, and standing water is strictly prohibited.

Detail Treatment: Corners should be rounded or chamfered. Internal and external corners, construction joints, and pipes penetrating walls should be reinforced with a substrate or coated with multiple layers of paint and sealed tightly with sealant.

• Construction Process Ingredients:

Type I, liquid : powder : water = 1:1:0

Type II, liquid : powder : water = 1:1.5:0.2–0.5

Type III, liquid : powder : water = 1:2:0.2–0.5

Mixing: Measure out the ingredients according to the specified proportions. While mixing, slowly pour the powdered ingredients into the liquid ingredients and mix thoroughly until there are no lumps remaining in the mixture.

Application: Use a scraper to apply the coating evenly to the substrate. After application, inspect the surface carefully to ensure there are no bare spots. Once the primer has cured, proceed with large-area application. The number of coats should be determined according to design requirements; it is recommended to apply at least three coats. During application, each coat should be applied in the same direction, with the next coat applied perpendicular to the previous one. Allow an 8-hour interval between coats, ensuring the coating is fully cured and no longer tacky. To prepare a colored coating, simply add pigment to the topcoat.

• Recommended Dosage

For a 1.0 mm-thick coating film, the total paint consumption is approximately 2.2–2.5 kg/m².

Applications

Suitable for waterproofing, seepage prevention, and moisture protection in bathrooms, kitchens, floors, balconies, and other areas.

It can also be used as one of the layers in a multi-layer waterproofing system for Class I and II roofs;

Type I products are primarily suitable for building waterproofing projects in environments where the structure is not subject to long-term submersion;

Type II and Type III are primarily used for waterproofing on the water-facing and non-water-facing sides;

When used in areas subject to prolonged immersion in water, the product’s water resistance must comply with the requirements of the relevant standards.

Packaging, Storage, and Transportation

• Packaging: Liquid: Sealed in plastic drums. Powder: Packaged in woven plastic bags.
• Storage: Store in a sealed container in a dry, well-ventilated, cool place at a temperature of 5°C or higher; the shelf life is at least 6 months from the date of manufacture.
• Shipping: This product is not flammable or explosive and may be shipped as general cargo. During transport, protect it from rain, direct sunlight, and freezing temperatures; avoid crushing or impact; and ensure the packaging remains intact.

Performance Metrics

Applicable Standard: GB/T 23445-2009 "Polymer-Cement Waterproof Coating"