Backstop® Flash and Fill

A Liquid Applied Flashing Membrane and Joint Filler

Backstop Flash & Fill is a flexible, waterproof material designed to fill sheathing joints, protect rough openings and act as a transition membrane. Backstop Flash & Fill is vapor permeable and eliminates air infiltration for above grade construction.

  • Gun applied, no mesh required
  • Will not trap moisture vapor
  • Eliminates additional product needs
  • No mixing required
  • Quick application
  • Vapor permeable
  • Fills sheathing joints up to 1/2”
  • One component material