GREAT STUFF Fireblock is specially formulated to impede the spread of flames and smoke through service penetrations - helping to slow the spread of these destructive elements during a fire. Designed for residential construction, it provides an easy and effective way to maintain the continuity of an approved fire block material. Fills , seals and insulates gaps up to 1/2 inch and impedes the spread fire and smoke through service penetrationsSeals electrical wires running through wall studsCreates an airtight, water-resistant sealCloses gaps and cracks, increasing the comfort and energy efficiency of your homeTack-free in 5-15 minutes, trims in one hourBright orange for easy code identificationa One 12 oz. can = up to 19 tubes of caulk. Ready-to-use straw applicator is a 1-time use foam.Exceptional adhesion to most building materialsAll direction dispensing