Below to see full description. Self-adhesive Acoustic Soundproofing Fire Proof CLASS O FOAM Reduction. Pyroseal Class O Foam Self-Adhesive Backed one side. Size: various sizes available. Use drop down bar to choose size required. Our Pyroseal Class’0′ Foam (also known as Fireseal or Pyrosorb-S) is manufactured by impregnating polyurethane foam with fire resistant carbon solution […]... Read More