NWT317 JJ Polymer-Cement Waterproofing Mortar

This product is a flexible waterproofing mortar made by mixing cement and fine aggregate—the main components—with polymers, additives, and other modifying materials in appropriate proportions. It is abbreviated as JJ waterproofing mortar and is commonly known as K11.

Single-component polymer-modified cementitious waterproofing mortar consists of cement, fine aggregate, redispersible latex powder, and additives.

This two-component polymer-modified cementitious waterproofing mortar consists of an organic liquid component made from high-quality acrylic emulsion and various additives, and an inorganic powder component made from special cement and fine aggregates. When mixed in a specific ratio, these components form a two-component, cement-based, flexible-rigid waterproof coating material.

Product Categories

Products are classified by composition into single-component (Class S) and two-component (Class D) types.

Single-component (Class S): Consists of cement, fine aggregate, redispersible latex powder, additives, and other components.

Two-component (Type D): Consists of a powder component (cement, fine aggregate, etc.) and a liquid component (polymer emulsion, additives, etc.).

Based on their physical and mechanical properties, they are classified into two types: Type I (general-purpose) and Type II (flexible).

Code Marker

Products are labeled in the following order: name, type, and standard number.

Example: A single-component Type I polymer-modified cementitious waterproofing mortar is labeled as: JJ Waterproofing Mortar S I JC/T 2090-2011

Product Features

• Water-based coating materials—non-toxic, harmless, and pollution-free, environmentally friendly coatings;
• Construction is not restricted by the moisture content of the subgrade; work can proceed as long as there is no standing water, which helps shorten the construction schedule;
• Cold application; easy to apply; can be brushed or troweled directly onto the concrete surface;
• It has excellent adhesion; once the mortar has set, tiles can be laid directly on it or it can be used as a leveling layer for plastering.

Construction Methods

• Process Flow

Cleaning the Base

Ingredients

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

• Key Construction Points

Substrate Preparation: The substrate must be sound, clean, level, damp, free of oil, and free of loose dust; if the substrate has defects such as pores or cracks, they must be repaired and smoothed out in advance with cement mortar.

Detail Work: Fill the reserved grooves with sealant as specified in the design; apply multiple coats at inside and outside corners and around pipe roots.

Application Instructions: Use a roller or brush to apply the mixture evenly to the prepared substrate, applying two or more coats; Once the first coat has dried to the point where it is no longer tacky to the touch (usually 1–2 hours), apply the second coat. Each subsequent coat should be applied at a right angle to the previous one. If more than 24 hours have passed or the coating has fully cured, the surface must be re-wetted with clean water before applying the second coat.

Protection of the Finished Product: Until the waterproofing layer has fully cured after installation, do not allow foot traffic, exposure to rain, direct sunlight, or damage from sharp objects. Any damaged waterproofing layer must be repaired promptly.

• Recommended Dosage

For a 1.0 mm-thick coating film, the total paint consumption is approximately 2.3–2.5 kg/m².

Applications

Used for waterproofing and moisture protection in non-exposed roofing projects; and for coating-based waterproofing in underground structures, tunnels, and storage caverns.

Suitable for waterproofing and moisture protection in bathrooms, kitchens, floors, balconies, sinks, walls, and other areas.

Packaging, Storage, and Transportation

• Packaging: Liquid: Packaged in plastic drums. Powder: Packaged in woven plastic bags.
• Storage: The product should be stored in a dry, well-ventilated, and cool place; the storage temperature for the liquid component should not be lower than 5°C. Under normal storage and shipping conditions, the product has a shelf life of 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: JC/T 2090-2011 "Polymer-Cement Waterproofing Mortar"