Fireproof Assembly Foam RAYTECH FSF-700 750 ml — firestop insulating polyurethane foam

RAYTECH FSF-700 fireproof assembly foam in a 750 ml can is a polyurethane-based firestop insulating foam designed for sealing and insulating joints, gaps and penetrations in walls, floors and service ducts. Developed for professional use on construction sites, this product combines the insulating properties of polyurethane foam with fire-resistant additives to limit heat transfer, flame spread and smoke migration where pipes, cables or other services pass through partitions.

Advantages

The foam provides rapid expansion and good adhesion to common building substrates such as concrete, brick, metal and some plastics, allowing efficient filling of irregular gaps and voids. Its fire-retardant formulation contributes to the creation of a firestop barrier that helps slow down the spread of flames and smoke. The product is supplied in a 750 ml aerosol can suitable for use with compatible applicator guns, providing controlled dispensing and reduced material waste.

Suitable for

• Sealing and firestopping around pipes and cable penetrations in walls and floors
• Filling gaps and construction joints that require fire-resistant sealing
• Insulating voids and cavities to reduce heat transfer and drafts
• On-site professional assembly and refurbishment work where fire protection is necessary

Key specifications

• Formulation: polyurethane-based insulating foam with fire-retardant additives
• Can volume: 750 ml
• Application: one-component, ready-to-use aerosol for use with applicator gun
• Adhesion: bonds to concrete, brick, metal and many construction substrates
• Expansion: controlled foam expansion to fill irregular voids and gaps
• Setting and cutting time: suitable for trimming after foam cure (follow manufacturer curing times)
• Storage: store upright in a cool, dry place away from direct heat sources

How to use

Before application, prepare substrates by removing loose debris, dust, oil and frost; surfaces should be clean and slightly damp for optimal adhesion. Shake the can vigorously before attaching it to a compatible applicator gun and apply from the bottom of the gap upwards. Dispense the foam gradually to allow it to expand and fill the cavity without excessive overflow. After curing, trim the excess material with a knife and finish the surface as required. Observe venting and drying times specified by the manufacturer and allow the foam to fully cure before exposing it to mechanical stress or painting.

Usage recommendations

Use appropriate personal protective equipment: gloves, eye protection and respiratory protection when spraying. Maintain temperature and humidity conditions recommended for best curing performance. For verified firestop performance, combine the foam with compatible firestop systems and follow applicable building codes and installation instructions. Do not use near open flames during application and avoid inhalation of vapors.