SpecSeal® SSS Firestop Sealant is a premium‑grade, water‑based intumescent firestop sealant engineered for exceptional performance on both combustible and non‑combustible penetrations. Formulated with proprietary two‑stage intumescent technology, SSS Sealant delivers superior expansion and sealing capability during fire exposure, making it a trusted solution for a wide range of mechanical, electrical, and plumbing penetrations. Requiring as little as ½ inch of applied depth, SpecSeal SSS Firestop Sealant can achieve up to a 4‑hour fire‑resistance rating when tested in accordance with ASTM E814 / UL 1479. Its smooth application, strong adhesion, and long‑term flexibility make it ideal for commercial, industrial, and high‑rise construction where code‑compliant firestopping is essential. Engineered for reliability and ease of use, SpecSeal SSS Firestop Sealant provides a durable, smoke resistant seal that maintains the integrity of fire‑rated assemblies under the most demanding conditions.