Expanding PU Foam - B3 All Purpose Fill & Fix 750ml

The B3 All Purpose Fill & Fix Expanding PU Foam is a versatile polyurethane foam designed for quick, economical application. Ideal for filling irregular gaps, fixing frames, and improving thermal and acoustic insulation, it expands efficiently without shrinking or deforming surrounding materials. Once cured, it can be cut, sawn, plastered, and sealed over.

Features:

• B3 fire rating (DIN 4102‐1)
• Low curing pressure – prevents deformation of frames and structures
• Excellent thermal & acoustic insulation
• High expansion rate for effective gap filling
• Non-shrinking formula for lasting performance
• Easy to finish – can be cut, sanded, or painted once cured

Typical Uses:

• Installing and sealing window and door frames
• Filling holes, cavities, and wall penetrations
• Insulating pipes and joints
• Sealing thermal and acoustic insulation boards
• Reducing thermal bridges and draughts