Soudal B3 Gun Grade Expanding Foam 750ml – High‑Performance PU Foam for Sealing, Filling & Insulation

Soudal B3 Gun Grade Expanding Foam (750ml) is a professional‑quality polyurethane foam designed for precise application using a foam gun. Rated B3, it offers excellent expansion, adhesion and insulation for a wide range of construction, installation and repair tasks.

This moisture‑curing foam provides a controlled, even bead with minimal waste — ideal for window and door fitting, gap filling, pipe penetrations, roofing work and general sealing where accuracy and efficiency matter.

Key Features

• B3‑rated PU foam for general construction use
• Gun‑grade formula for clean, controlled application
• High expansion and strong adhesion to most building materials
• Excellent thermal and acoustic insulation
• Fast‑curing, moisture‑activated foam
• Low wastage compared to hand‑held foams
• Can be cut, sanded and painted once cured

Advantages

• Perfect for window and door installation
• Fills large gaps and voids quickly and securely
• Improves energy efficiency by sealing drafts and air leaks
• Strong, durable bonding on brick, concrete, timber, metal and uPVC
• Professional finish with reduced mess and overspray

Typical Uses

• Installing and sealing window and door frames
• Filling gaps around pipes, cables and service penetrations
• Insulating cavities, joints and voids
• Roofing, cladding and general construction sealing
• Acoustic and thermal insulation improvements