Save big this Memorial Day. These offers end soon. Shop Now >

Link to Lowe's Home Improvement Home Page

Prices, Promotions, styles, and availability may vary. Our local stores do not honor online pricing. Prices and availability of products and services are subject to change without notice. Errors will be corrected where discovered, and Lowe's reserves the right to revoke any stated offer and to correct any errors, inaccuracies or omissions including after an order has been submitted.

3M Fire Barrier 1.45-in to 1.45-in H Caulk Grade Silicone Firestop Sealant

Get Pricing & Availability

Firestop tested up to 4 hours in accordance with ASTM E814 (UL 1479) and CAN/ULC-S114
High-solids formula produces limited shrinkage
Continuous seal remains pliable and allows for typical pipe movement

Best Price. Guaranteed

Find a lower price on an exact item? We'll match it. Some exclusions apply.

Learn More

FREE Returns

Return it in store or ship it back for free. Eligibility rules apply.

Learn More

FREE Shipping

Delivery is on us for orders over $45. Some exclusions apply.

Learn More

3M Fire Barrier Water Tight Sealant 3000 WT provides up to 4-hour fire protection in tested and listed systems. It is a gun-grade, intumescent, silicone, elastomeric sealant that cures upon exposure to the atmosphere to form a monolithic flexible firestop seal. Properly installed, this sealant helps control the spread of fire, smoke and noxious gasses before, during and after exposure to fire and exhibits good adhesion to a full range of construction substrates.

Firestop tested up to 4 hours in accordance with ASTM E814 (UL 1479) and CAN/ULC-S114
High-solids formula produces limited shrinkage
Continuous seal remains pliable and allows for typical pipe movement
Re-enterable and repairable fire barrier sealant
Offers excellent sealant and caulking properties
Sealant helps minimize noise transfer