SpecSeal® LCI Firestop Sealant is a high‑performance, water‑based intumescent firestop sealant designed for a broad range of through‑penetration and construction joint applications. Engineered for exceptional ease of use, LCI Sealant features excellent caulking and tooling properties, making it ideal for vertical installations, overhead applications, and other challenging jobsite conditions. Upon exposure to fire, SpecSeal LCI expands to form a durable, insulating char that helps block the spread of fire, smoke, and hot gases through mechanical, electrical, and mixed‑use penetrations. Its water‑based formulation allows for easy cleanup, low odor, and compatibility with numerous substrates, offering a reliable, code‑compliant solution for commercial, industrial, and residential construction environments.