Hercules® Firestop Caulk, Cartridge, 10.1 fl-oz, Latex Base, Composition: Acrylic Polymer, Calcium Carbonate, Sulfuric acid, compound with graphite, Alumina Trihydrate, Paste, Fire Rating: Up to 3 hr, Off-White, Odor/Scent: Slight, Applicable Materials: Steel, Iron, Copper Pipes, Non-Metallic Pipes, Tubing PVC, CPVC, ABS and PEX

Hercules plumbers firestop sealant is latex based and intended for multi-purpose use. This intumescent sealant provides up to a three hour fire rating and is designed for a wide array of firestop applications in small commercial or grouped residential construction or other structures with similar characteristics. Can be used in systems where dynamic movement is expected: plumbing; HVAC; bath and dryer vents; metallic pipes; non-metallic pipes, conduits and tubing; insulated pipes; electrical and electronic cabling; concrete, gypsum, metal ductwork; wood floors. Expands up to 10 times to block flame propagation. Excellent smoke seal. Water-based for easy cleanup. Water-resistant once cured; will not separate or shrink when dry. Tested for excellent acoustical performance; reduces noise transmission. Flexible, non-sagging, and low odor. Paintable. Low VOCs. No solvents. Non-halogenated. Does not contain PCBs or asbestos.

ASTM E814 (UL1479) Meets Class A Finish Requirements for Flame Spread and Smoke Development when Tested in Accordance with ASTM E84 (UL723)|ASTM E90: Acoustically Tested|Demonstrating Excellent Sound Attenuation Properties|FM Approved|UL Listed|PROP65: This product contains a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm