BOSS® 338 Flexible Foam Gun Grade

A unique, flexible, minimal expansion, one component, moisture curing PU foam. Designed for window and door installs, insulating wall panels, electrical outlets, pipes and vents.

  • Very high elastic recovery (up to 90% if compressed by 75%)
  • Easy application
  • Minimal expansion
  • 2 year shelf life
  • Excellent adhesion to almost all substrates
  • Excellent thermal and acoustical insulation
  • No shrinkage
  • Storage in all positions
  • AAMA compliant

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