JS Polymer Cement Waterproof Coating – Two-Component Water-Based Waterproof Solution

JS Polymer Cement Waterproof Coating

Younson JS polymer cement waterproof coating (JS waterproof coating) is a two-component water-based waterproof coating formulated with acrylic ester, vinyl acetate–ethylene copolymer emulsion, cement, fillers, and other additives. The coating cures through moisture evaporation and cement hydration, forming a durable waterproof film.

Product Specification Types

• Classified by physical and mechanical properties: Type I, Type II, and Type III
  
• Type I: Suitable for substrates with higher movement.
  
• Type II and Type III: Suitable for substrates with lower movement.
  

Product Features

• High tensile strength and elongation at break.
  
• Excellent water and chemical resistance.
  
• Can be applied directly on damp (without standing water) or dry substrates, forming large-area seamless waterproof membranes.
  
• Simple construction with short project duration.
  
• Strong adhesion to common building materials.
  
• Can be applied over existing waterproof layers for repair.
  
• Environmentally friendly, safe for drinking water applications.
  

Scope of Application

• Suitable for interior and exterior walls, kitchens and bathrooms, and pools.
  

Executive Standards

• GB/T 23445-2009 《Polymer Cement Waterproof Coating》
  

Construction Method

1. Inspection, Cleaning, and Surface Repair:
   
   • Ensure substrate is solid.
     
   • Remove dirt, loose particles, or contaminants.
     
   • Repair damaged, powdering, or sandy areas with polymer cement waterproof mortar. Clean repaired areas and apply a primer coat before proceeding.
     
   • For roofs, check that the substrate slopes properly for drainage. Fill low spots with polymer cement mortar before repair.
     
2. Surface Preparation:
   
   • Clean by washing or sweeping, ensuring no standing water remains.
     
   • Apply a primer coat to the substrate.
     
3. Reinforcement at Critical Points:
   
   • Strengthen areas around drain holes, wall penetrations, cracks, expansion joints, and corners before applying the main waterproof layer.
     

Transportation and Storage

• Protect from rain, sunlight, and freezing temperatures during transport; avoid compression and impact. Keep packaging intact.
  
• Store in a dry, ventilated, and shaded area.
  
• The liquid component should be stored at temperatures not lower than 5°C.
  

Under normal transport and storage conditions, the product has a shelf life of at least six months from the production date.

Construction Timing / Usage

• Primary Use: New Construction / Pre-Construction (applied to walls, roofs, and floors during building phase)
• Secondary Use: Post-Construction / Repair & Renovation (can be applied over existing waterproof layers for repair or reinforcement)