Soudal low-expansion gun foam 750 ml — professional pistol applicator foam, one-component insulating sealant

Soudal low-expansion gun foam 750 ml is a one-component insulating and sealing foam formulated for use with a pistol applicator. Designed to deliver controlled, minimal expansion, this foam reduces the risk of deformation around frames and fixtures while providing thermal and acoustic insulation. The product is intended for professional and DIY use in construction and renovation tasks where precise filling and sealing of joints, gaps and penetrations is required.

Advantages

The low-expansion formula ensures limited post-application swelling, allowing accurate dosing and preventing pressure on window and door frames. As a one-component system, the foam cures by atmospheric moisture to form a rigid, durable cellular structure with good thermal and acoustic insulating properties. The product is compatible with standard pistol applicators and adheres well to common construction substrates such as concrete, brick, wood and many plastics when surfaces are clean and free of loose material.

Suitable for

• Installation and sealing of window and door frames
• Filling gaps and joints in masonry and carpentry
• Thermal and acoustic insulation of service penetrations and cavities
• Mounting and anchoring of lightweight elements where controlled expansion is needed

Key specifications

• Formulation: one-component, low-expansion polyurethane foam
• Packaging volume: 750 ml per canister
• Application method: pistol applicator (gun)
• Curing: moisture-cured at room conditions
• Performance: controlled minimal expansion for reduced deformation
• Properties: thermal and acoustic insulating characteristics after curing

How to use

Shake the canister thoroughly before use and attach it to a compatible gun applicator according to the applicator manufacturer's instructions. Prepare substrates by removing dust, loose particles, oil and frost; slightly dampening very dry surfaces can improve adhesion. Dispense foam in short bursts, filling cavities partially to allow for controlled expansion and avoid overfilling. After application, tooling and trimming can be done once the foam has cured sufficiently. Clean the applicator and uncured foam residues with an appropriate solvent or cleaner recommended for polyurethane foams.

Usage recommendations

Avoid applying the foam at temperatures outside the manufacturer's recommended range and keep surfaces and the canister within suitable temperature limits for consistent performance. For sealing around windows and doors, apply in layers and allow each layer to expand and cure before adding more foam. Use protective gloves and eye protection; ensure adequate ventilation during application. Store unopened canisters upright in a cool, dry place away from direct sunlight and sources of heat.