Firefoam B1 Expanding Sauna Insulation Gap Filling Foam

£9.99 inc VAT

In stock


Sauna Insulation Gap Filling Foam expands on application to yield up to 50 times the can contents and meets the extremely stringent requirements of the test criteria BS476 Part 20; Class B1. Fire rated up to 4 hours in certain joint configurations. Once cured, the foam can be cut, sawn or plastered over after approximately one hour.


High degree of fire rating: slows down the passage of
flames and smoke

Quick setting – can be cut, sawn or plastered in 1

Economical in use – expands up to 50 times its origin-
al aerosol volume

Fills irregular and broad gaps where most conven-
tional fillers would fail

Possesses insulating and sound deadening properties
Expansion 40 litres (750ml can)
Cell structure Medium fine
Elongation at tension 25% (DIN 53430)

Best to use with Finnfoam FF-PIR or Kingspan Sauna-Satu sauna grade insulation

Technical data

Additional information

Weight 2 kg