Learn the fundamentals of firestop, from containment to control and everything in-between.

  • Over 1200 Tested UL Systems
  • On-Site UL Testing & Research
  • No Poisons or Harmful Chemicals
  • Meets Requirements for LEED® Accreditation Points
  • Complies with UL 1479 Accelerated Aging Requirements
  • Excellent Freeze / Thaw Capabilities

Worldwide Leader in Firestop Technology – Our family of UL approved Metacaulk® Firestopping Products is specifically designed to fill voids in construction joints and around penetrations in fire-rated walls or floors. Many have intumescent properties and expand when exposed to heat, forming a high-strength insulating char.

Metacaulk® products contain a combination of biocides that protect the product in both the cured and non-cured state against mold growth. Our intumescent firestop products comply with required environmental exposure testing of accelerated aging and high humidity, as per UL 1479 Fire Test of Through-Penetration Firestops. In the event of fire, Metacaulk® sealants will restrict the spread of flames, smoke, hot gases and water. Whatever your application, we provide the most cost effective products to fit your every need.