Metal Roofing panels, Metal shingles, and Metal siding (800) 615-8416

Emseal Expanding Closure Foam


Emseal Expandable Foam

Used For Valley Panels or Hip Roof Ridge Caps

1/4″x1″x20′ Expands to 1″x1″x20′

25 in stock

SKU: 1748 Categories: , Tags: , ,




  • AST is a self-adhering foam tape impregnated with water-based acrylic-modified asphalt emulsion
  • It is an excellent alternative to butyl tape & open-cell polyurethane foam strips
  • Will not dry out and become hard and brittle
  • UV-stable
  • Highly resistant to bugs and vermin
  • Will not extrude from between joints like caulk or butyl tapes
  • Conforms to contours and fills gaps
  • Maintains a seal during thermal expansion and contraction of building
  • Excellent compressibility and recovery (minimal compression set)
  • Good thermal and sound insulator
  • No shrinkage or blow-out due to closed-cell breakage
  • Supplied with self-adhesive on one side. After removal of packaging,
    material begins gradual expansion – more slowly in cold weather than in hot.



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