Everbuild Thermofoam Airtight Acoustic Expanding Foam EVTHERM7 | Sealants and Tools Direct
BC Profiles Soudal Soudafoam FR | High Yield Hand Held Fire Resisting, Expanding Polyurethane Foam Filler, Excellent Thermal and Acoustic Insulation - 750ml - Pink : Amazon.co.uk: DIY & Tools