Description
CHEM PU Membrane – Single Component Polyurethane Waterproofing Coating
CHEM PU Membrane is a premium-quality polyurethane waterproofing coating designed for high-performance protection across a wide range of surfaces. This single-component waterproofing membrane forms a seamless, rubber-like barrier that prevents water ingress, seepage, and dampness in concrete, masonry, and metal structures.
Manufactured by a trusted waterproofing chemicals manufacturer, this advanced solution ensures long-lasting durability with a semi-smooth decorative finish available in White (for waterproofing & heatproofing) and Grey (primarily for heatproofing applications).
Key Features & Benefits
- Highly Elastic – Accommodates structural movement without cracks
- High Tensile Strength – Ensures superior durability
- Crack Bridging – Effectively seals hairline cracks
- Seamless Waterproof Membrane – Complete protection from leakage
- UV & Oxidation Resistant – Perfect for outdoor exposure
- Long-Lasting Performance – Withstands extreme weather conditions
- Easy Repair & Recoating – Maintenance-friendly system
- Eco-Friendly (No VOC) – Safe for residential and commercial use
Applications
This advanced waterproofing and heatproofing chemical is suitable for:
- Concrete and RCC structures
- Masonry and metal surfaces
- Bathrooms and kitchens (wet areas)
- Basements and retaining walls
- Roof waterproofing and heatproofing
- GRP & GRC structures
- Internal and external walls
Technical Specifications
- Type: Polyurethane Membrane
- Color: Liquid (White / Grey)
- Specific Gravity: 1.1 ± 0.05
- Tensile Strength: > 8 N/mm²
- Tear Resistance: > 15 N
- Elongation: > 400%
- Shore Hardness A: 70
- UV Resistance: 2000 hours (QUV Tested)
- Service Temperature: 30°C to 80°C
- SRI (Solar Reflectance Index): 101
Application Guidelines
Surface Preparation
- Clean surface from dust, oil, and loose particles
- Fill cracks larger than 1mm
- Damp concrete surfaces to SSD condition
- Clean and grit blast steel surfaces
Application Method
- Primer Coat: Dilute with 20% base product
- Coverage: 1 kg per 3–4 sqm
- Final Coat: 1 kg per 1.2–1.6 sqm
Drying & Curing Time
- Touch Dry: 2–4 hours
- Partial Cure: 12–24 hours
- Full Cure: 48 hours
Packaging & Storage
- Packaging: 20 Kg (custom sizes available)
- Shelf Life: 12 months
- Storage: Keep between 5°C and 35°C in dry conditions
Safety Precautions
- Avoid inhalation of fumes
- Use gloves, goggles, and protective clothing
- Ensure proper ventilation
- Wash with water in case of contact
Across Pakistan
CHEM PU Membrane is recognized as one of the best waterproofing chemical for long-lasting protection, delivering superior performance for roofs, basements, and walls. As a leading waterproofing chemicals manufacturer across Pakistan, we provide high-quality solutions designed to prevent leakage, seepage, and structural damage in all types of buildings.
Our advanced PU coating is ideal for waterproofing across Pakistan, ensuring durable protection in residential, commercial, and industrial projects. In addition to waterproofing, this product also functions as a powerful heatproofing chemical, helping reduce surface temperature and improve indoor comfort, especially in extreme weather conditions.
As a trusted heatproofing chemicals manufacturer across Pakistan, we are committed to delivering eco-friendly, high-performance solutions that meet modern construction needs. Whether you require professional heatproofing across Pakistan or reliable waterproofing systems, CHEM PU Membrane offers the perfect combination of strength, flexibility, and durability.
Our waterproofing and heatproofing chemicals are engineered for wide-ranging applications, making them suitable for roofs, walls, basements, and exposed surfaces. With our premium PU membrane, you can achieve dependable roof waterproofing and heatproofing solutions across Pakistan.
We specialize in construction chemicals, waterproof coatings, roof heatproofing systems, and PU waterproofing membranes, serving customers across Pakistan with consistent quality and trusted performance.








Muhammad Hashir Tanveer –
Best waterproofing solution! Chem PU Membrane gave my concrete surfaces a durable, decorative finish while protecting against water and dampness.