Willseal® Seismic HS

Pre-Compressed Horizontal Expansion Seal

Willseal® Seismic-HS 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 construction joints
  • Retrofit and seismic joints
  • Joints in pre-cast concrete floor to wall joints
  • Exterior panel systems (masonry, granite, metal, curtainwalls)