Gun Grade Expanding Foam is a quick setting polyurethane-based foam which expands greatly on application and yields up to 50 times original can contents. It fills irregular gaps, fixes framework, insulates and sound deadens. 
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Quick setting – can be cut, sawn or plastered in 1 hour
Fills irregular and broad gaps where most conventional fillers would fail
Possesses insulating and sound deadening properties
Designed for professional use in conjunction with Gun Foam Applicators