METACAULK® Firestop Putty – Intumescent Fire Barrier for Through Penetrations

A moldable, self-leveling firestop putty designed to seal large or irregularly shaped openings in walls, floors, and ceilings. Provides 2-hour fire resistance and complies with ASTM E814 (UL 1479), FM Approved, and ULC/CAN4-S115-M standards.

Key Features:

✔ Fire & Smoke Protection – Expands when exposed to heat, sealing gaps to prevent the spread of flames, smoke, and toxic gases (Flame Spread Index: 10 | Smoke Developed Index: 125 | Class A Fire Rating).
✔ Moldable & Hand-Applied – Easily shaped to fit irregular openings, conduits, metal pipes, and non-metallic outlet boxes.
✔ Self-Leveling – Adapts to gaps for a secure, airtight seal.
✔ Paintable (After Full Cure) – Compatible with non-solvent-based paints for a finished look.
✔ Sound Dampening – Enhances acoustic insulation (STC Rating: 60).
✔ Long Shelf Life – 2-year storage stability.

Technical Specifications:

• Form: Silicone-based putty

• Color: Red

• Dimensions (Putty Bar): 7" L x 7" W x 0.13" Thick

• Coverage: 0.15 cu ft

• Water-Activated: Yes (for adhesion)

• Watertight: No

• Suitable For: Through-penetrations in conduit, steel, metal, and non-metallic outlet boxes

• Standards Met: ASTM E814 (UL 1479), FM Approved, UL 1479, ULC/CAN4-S115-M

• Country of Origin: USA