AssanPU | B1 Rated PU Foam

B1 FIRE RATED PU FOAM is a single component, moisture curing, self-expanding, ready to use polyurethane foam with propellants which are completely harmless to ozone layer. It has a fire rating of up to 217 minutes in certain configurations. High quality PU straw foam recommended for sealing applications where fire resistance is required. It is designed for easy dispensing through the straw adapter included with each can.

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All applications where fire retardant properties are required such as:
• Installation of door and window frames.
• Filling and sealing gaps, joints and cavities.
• Filling of penetrations in walls.
• Heat insulation of roof construction.
• Sealing of cable and pipe penetrations.
• Soundproofing and sealing partition walls.
• Bonding of insulation materials.
• Multi-Purpose, adhesion and fixation.


• Basis Polyurethane Prepolymer
• Curing System Moisture cure
• Specific Gravity 21±2 kg/m3 (ASTM D1622)
• Tack-Free Time (1 cm width) ~10 min. (ASTM C1620)
• Cutting Time (1 cm width) 25-45 dk. (ASTM C1620)
• Cure-Time 24 hours
• Foam Colour Red
• Yield 35-45 L (ASTM C1536)
• Shrinkage No
• Fire Class of the Cured Foam B1 (DIN 4102)
• UL Flame spread: 0
• Smoke Development: 5 (UL 723)
• Thermal Conductivity 0,036 W/m.k (at 20°C) (DIN 52612)
• Compression Strength 0,03 MPa (DIN 53421)
• Water Absorption Max. 1 vol% (DIN 53428)
• Temperature Resistance -40°C to +90°C
• Application Temperature +5°C to +30°C
• Can Temperature +5°C to +30°C