Willseal Seismic

Pre-Compressed Expansion Seal

Willseal® Seismic is a pre-compressed, self-expanding open micro-cell polyurethane foam impregnated with a hydrophobic, acrylic polymer and coated with a factory-applied silicone sealant. It is designed to provide a watertight, dust-proof, noise-reducing, thermally insulating, and UV stable primary seal that does not require invasive anchoring for installation.

Basic Uses
  • Primary expansion, control, isolation joints
  • Primary construction joints
  • Retrofit & seismic joints
  • Vertical expansion joints (Willseal Seismic HS for horizontal joints)
  • Joints in pre-cast concrete, masonry, brick, and facades
  • Exterior insulation finish systems (EIFS)
  • Exterior panel systems (masonry, granite, metal, curtainwalls)
  • ac_unit Do not install when substrate or ambient temperatures are below 14°F (-10°C) help
  • whatshot Do not install when substrate or ambient temperatures are above 95°F (35°C) help

Product Details, Safety, and Installation