IZOZENĀ® FLEXPRO PU 500
IZOZENĀ® FLEXPRO PU 500 is a one-component polyurethane waterproofing liquid membrane designed for terraces and other surfaces.
Properties
Excellent resistance to mechanical, chemical, thermal, UV, and weather conditions.
Based on pure, elastomeric, hydrophobic polyurethane resins.
Creates a uniform, elastic, vapor-permeable sealing layer without seams or joints.
Strong adhesion to concrete, cement mortars, wood, and most waterproofing layers.
Suitable for irregular substrates.
Can be applied on green roofs, flower beds, and more.
Provides toxicity and fungi resistance.
Available in white and other colors.
Technical data
Form: Pre-polymer polyurethane
Colors: Grey/White (custom colors available)
Density: 1.30 ā 1.35 kg/l
Viscosity: 4000 Ā± 500 mPaĀ·sec
Elongation at Break: 600 Ā± 80%
Tensile Strength (ASTM D412): 6.4 N/mmĀ²
Hardness (Shore A, ASTM D2240): 75 Ā± 3
Water Impermeability (DIN 1048): 5 atm
Maximum Surface Temperature: +35Ā°C
Minimum Surface Temperature: +5Ā°C
Operating Temperature: ā20Ā°C to +80Ā°C
Reaction to Fire (EN 13501-1): Euroclass F
Directions for Use
Substrate Preparation
General Requirements:
Surface must be dry (moisture < 4%), clean, free of oil, grease, dust, or loose material.
Concrete Substrates:
Fill cavities with appropriate repair materials beforehand.
Smooth/Non-Absorptive Substrates (e.g., bituminous membranes):
Prime with a water-based epoxy primer. (Consult IZOZENĀ® technical advisor.)
Metal Surfaces:
Dry, clean, free of rust, grease, or dust.
Prepare by brushing, rubbing, or sandblasting.
Can be applied without priming.
Application & Consumption
Stir slightly before use (avoid extensive mixing to prevent air entrapment).
a) Surface Sealing
Apply in 2 layers with brush/roller.
First layer: 2ā3 hours after priming (while primer is tacky).
Second layer: crosswise, after 8ā24 hours (weather dependent).
Consumption: 1.0ā1.5 kg/mĀ².
For dense cracks: reinforce with 100 cm wide polypropylene fiber tape (40 g/mĀ²), overlapping by 5ā10 cm.
b) Waterproofing Under Tiles
Apply in 2 layers with brush/roller.
Reinforce joints and wall-floor junctions with 10 cm polypropylene fiber tape.
Apply 2 extra layers over cracks.
While fresh, broadcast dry quartz sand (Ć 0.3ā0.8 mm, ~3 kg/mĀ²).
After hardening, remove loose sand and fix tiles using polymer-modified adhesive (e.g., IZOZEN FLEXPRO AK series).
Fields of Application
IZOZENĀ® FLEXPRO PU 500 is ideal for waterproofing:
Terraces and balconies (exposed membrane).
Under tile layers in kitchens, bathrooms, balconies, and terraces (with quartz sand broadcast).
Under thermal insulation boards on terraces.
Highways, bridge decks, tunnels, and construction works.
Foundations.
Gypsum and cement boards.
Old layers of bituminous or EPDM membranes.
Polyurethane foam.
Metal and concrete surfaces.