Flammability Rating—Tested in accordance with NFPA standards 80, 105, and 252, these silicone rubber seals are for use on fire-rated doors. They meet UL 10B, UL 10C, and UL 1784.

EPDM Foam—Made of EPDM foam, these seals resist water, sunlight, and ozone while also meeting transportation industry standards for flames, smoke, and toxicity. Softer and more flexible than EPDM rubber seals, they conform to uneven surfaces to guard against dust, noise, and vibration. The foam has a closed-cell construction, which resists absorption.

Silicone Rubber—Made of solid silicone rubber and tested to meet strict NFPA fire standards, these seals can be used on fire-rated doors in environments that reach up to 600° F. They also stand up to water and salt. They’re firmer and more durable than silicone foam seals.

Flat Weatherstripping Seal—Flat seals press tight against smooth surfaces to form a solid barrier. However, they don’t compensate for uneven surfaces as well as bulb seals. Behind the seal, there’s a fire-stop strip that expands to eight times its original size in temperatures above 375° F. During a fire, it completely fills any gaps. This weatherstripping is often added to existing fire doors to help them meet NFPA safety regulations without replacing the entire door. Use end plates to cover the sides of the doors for a finished look from every angle.

Neoprene Seal—Neoprene is more weather resistant than vinyl. It stands up to abrasion, water, oil, and detergents.

Stainless Steel—Stainless steel is stronger than aluminum, so it holds its shape better if exposed to fire. It’s also more chemical and corrosion resistant.