750ml Expanding Polyurethane Foam Sealant for DIY

This high-foaming expanding polyurethane foam sealant is formulated to fill irregular voids, gaps, and deep cavities that standard fillers cannot reach. It creates a robust barrier against dust, drafts, pests, and moisture, making it ideal for both interior and exterior sealing projects.

Featuring anti-contraction properties, the cured foam maintains its structural stability and resists shrinkage through shifting temperatures and natural settling. It bonds strongly to brick, concrete, wood, plaster, and metal, while delivering reliable acoustic and thermal insulation that can be easily trimmed and painted for a seamless finish.

Key Features

Highlights

• High-foaming expansion formula: Fills large and deep voids completely with a single application.
• Weather and moisture resistance: Protects against dampness and outdoor elements, suitable for both interior and exterior sealing projects.
• Excellent acoustic insulation: Dampens sound transmission through walls and pipes.
• Strong adhesive bond: Adheres to brickwork, plaster, and metal surfaces to ensure the sealant stays in place.
• Anti-contraction properties: Maintains shape and volume once fully cured, preventing new gaps from forming.
• Trimmable and paintable finish: Can be cut away and painted or plastered for a seamless finish.

Compatibility

Compatible with brickwork, concrete, masonry, wood, plasterboard, and metal substrates for gap filling, pipe penetration sealing, and draft insulation.

How to use

Shake the can thoroughly before use. Apply the foam into gaps and cavities, leaving room for expansion as it cures. Once fully hardened, trim away any excess material with a utility knife and finish with paint, plaster, or sealant as desired.

What's included

• 1x Polyurethane Foam Sealant 750ml Can