PU 270 Polyurethane Waterproof Coating

About PU 270 Polyurethane Waterproof Coating

91 000 74051 Dr. Fixit Flexi PU 270(I) A high-performance, solvent-based, one-component, polyurethane waterproofing membrane. It is liquid-applied, cures upon contact with air moisture, and forms a highly flexible, seamless, and elastic protective layer.
Primary Function: To provide a durable, long-lasting, and root-resistant waterproofing barrier for a wide variety of structures, capable of bridging cracks and withstanding significant structural movement.
Key Features & Benefits (from TDS):
Highly Elastic & Flexible: Exceptional elongation (400%) to bridge cracks up to 2mm and accommodate movement.Seamless Membrane: Forms a continuous, joint-free layer, eliminating weak points.Excellent Adhesion: Bonds strongly to most substrates (concrete, metal, asbestos, etc.).Breathable: Allows water vapour to escape from the structure (permeable).Durable: Resistant to water, frost, chemicals, oils, detergents, and plant roots.Wide Temperature Range: Maintains properties from -40C to +80C.Root Resistant: Certified as resistant to plant roots (EN 13948), making it ideal for roof gardens.
Q1: How is this product applied?A: It is typically applied in 2 or 3 coats by roller, brush, or airless spray.Surface Prep: Surface must be clean, sound, and absolutely dry (<5% moisture). New concrete must cure for 28 days.Priming: Absorbent surfaces must be primed with Dr. Fixit Primer PU or Dr. Fixit Pidipoxy MIFP.Application: Apply the first coat. Apply the second coat after 12-18 hours (but within 48 hours).Reinforcement: Reinforce critical areas (corners, joints, pipes) with Geotextile Fabric embedded in the wet coating.Q2: What is the coverage area?A: The total consumption is approximately 1.2 1.5 kg per square meter for a 2 or 3-coat system. Actual consumption depends on surface porosity and application method.Q3: How long does it take to cure?A:Tack-free: 5-6 hours (at 20C, 50% RH)Light foot traffic: 24 hoursFinal cure: 7 daysQ4: Does it need a protective layer?A: Yes, protection is mandatory.For terraces: Protect with a 40-50mm concrete screed (M20 grade) laid over a geotextile separation layer.For roof gardens: Follow the screed with finishing layers (brickbat coba, tiles, etc.).Alternatively, it can be finished with Dr. Fixit PUTC (polyurethane top coat) for UV stability and colour.Q5: Can it be applied on wet surfaces?A: No. Absolutely not. The surface must be completely dry (<5% moisture content). The TDS explicitly warns: "Do not wash surface with water." before application.Q6: What is the shelf life?A: 9 months from the date of manufacture when stored in its original, unopened container in a dry, cool place (5C to 30C), protected from moisture and direct sunlight.Q7: Is it safe? What precautions are needed?A: Caution Required. The product contains isocyanates. During application, you must wear:Protective clothingChemical-resistant glovesEye gogglesAvoid contact with skin and eyes. Ensure adequate ventilation. Always refer to the Material Safety Data Sheet (MSDS) before use.Q8: How does it handle cracks?A: It has excellent crack-bridging capabilities:It can bridge dynamic cracks up to 2mm wide.Larger cracks and joints must be pre-sealed with Dr. Fixit PU Sealant and reinforced with geotextile fabric before the general membrane application.