CHEMFLEX-PU

Single Component Polyurethane Waterproofing Coating

CHEMFLEX-PU is a single-component, UV-resistant, heat-reflective polyurethane waterproofing coating designed to provide a seamless, elastic, and durable protective membrane for concrete and steel structures. It offers excellent waterproofing performance, flexibility, and long-term weather resistance.


Key Features

  • Exceptional Waterproofing
  • Heat Reflective Coating
  • High Flexibility
  • UV Resistant
  • Chemical Resistant
  • Crack Bridging
  • Single Component
  • Easy Application
  • Quick Cure Time
  • Low VOC Formulation

Applications

Suitable for:

  • Roof Waterproofing
  • Wet Areas Waterproofing
  • Basement Waterproofing
  • Foundation Waterproofing
  • Steel Structure Waterproofing
  • Bridge Deck Waterproofing
  • Water Tanks & Vessels
  • Commercial Buildings
  • Dead Walls Waterproofing
  • Flooring Protection
  • Sports Flooring

Advantages

  • Forms a seamless waterproof barrier
  • Prevents water penetration
  • Excellent elasticity to accommodate substrate movement
  • Outstanding UV resistance
  • Resistant to common chemicals and pollutants
  • Heat reflective surface
  • Spray, brush, or roller application
  • Rapid curing for faster project completion
  • Environmentally friendly low VOC formulation

Packaging

Available in:

  • 5 kg Bucket
  • 16 kg Bucket
  • 20 kg Bucket
  • 200 kg Drum

Technical Specifications

PropertyValue
AppearanceLiquid
Standard ColorsWhite, Gray, Tan
Density1.2–1.4 g/cm³
Solid Content80–85%
Tensile Strength>3 MPa
Elongation at Break>400%
Shore A Hardness60–70
UV ResistanceExcellent
Chemical ResistanceExcellent
Service Temperature-40°C to 90°C
Recoat Time4–6 Hours
Full Cure Time24–48 Hours

Surface Preparation

  • Surface should be clean, dry, and sound.
  • Remove dust, grease, wax, curing compounds, laitance, and contaminants.
  • Repair rough areas before application.
  • Apply the first coat diluted with 20% water as a scratch coat.
  • Use an adhesion-promoting primer where required.

Storage

Store under cover, away from direct sunlight and extreme temperatures. Shelf life is 1 year when stored under recommended conditions.