Why do you NEED Soudal Fire and Acoustic Expanding Foam?
12 x B1 Fire Rated Foam Soudal Gun Grade Expanding Insulating PU Foam 750ml : Amazon.co.uk: DIY & Tools
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B1, B2 and B3-PU foam and fire protection foam
B1/B2 Grade Fire Rated Polyurethane Foam - China PU Foam, B2 Grade PU Foam | Made-in-China.com
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