Best Gorilla Caulk in 2026

BUILDING CODE COMPLIANCE – seals openings through fire barriers where mechanical services pass through

HELPS PREVENT FIRE SPREAD - capable of expanding a minimum of 3 times its dried volume when exposed to temperatures above 1000°F (538°C)

ONE PRODUCT, MANY USES – listed in hundreds of UL Firestop systems with up to 4-hour ratings

BUILDING CODE COMPLIANCE – seals openings through fire barriers where mechanical services pass through

HELPS PREVENT FIRE SPREAD - capable of expanding a minimum of 3 times its dried volume when exposed to temperatures above 1000°F (538°C)

ONE PRODUCT, MANY USES – listed in hundreds of UL Firestop systems with up to 4-hour ratings

RESISTS HIGH TEMPERATURES (up to 2000F): Water-based, non-combustible draft, smoke and fire-blocking sealant designed to resist high temperatures and smoke passage in non-rated construction.

SEAL INTERIOR CONSTRUCTION VOIDS: Superior adhesion strength, caulk rate and non-sag application, plus a halogen-free formula. No mixing required.

FAST DRY: Tack free in approximately 15 minutes.

Permanent bonding – above and below the waterline

Industry standard for over 50 years

Offers extended working time

TESTED AND LISTED: For through-penetrations up to 3-hours in accordance with ASTM E814 (UL 1479) and CAN/ULC S115. Provides L-Rating (smoke seal)

TESTED AND LISTED: For construction joints up to 4-hours in accordance with ASTM E1966 (UL 2079) and CAN/ULC S115

ACRYLIC LATEX-BASED SEALANT: Offers an economical alternative to firestopping metal pipes or cables through concrete or gypsum, and in dynamic head-of-wall systems

Firestop tested up to 3 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115

Fire resistive joint system tested up to 4 hours in accordance with ASTM E 1966 (UL 2079)

Continuous seal remains pliable and allows for typical pipe movement

BUILDING CODE COMPLIANCE – seals openings through fire barriers where mechanical services pass through

HELPS PREVENT FIRE SPREAD - capable of expanding a minimum of 3 times its dried volume when exposed to temperatures above 1000°F (538°C)

ONE PRODUCT, MANY USES – listed in hundreds of UL Firestop systems with up to 4-hour ratings

BUILDING CODE COMPLIANCE – seals openings through fire barriers where mechanical services pass through

HELPS PREVENT FIRE SPREAD - capable of expanding a minimum of 3 times its dried volume when exposed to temperatures above 1000°F (538°C)

ONE PRODUCT, MANY USES – listed in hundreds of UL Firestop systems with up to 4-hour ratings

TESTED FIRESTOP PERFORMANCE: Tested and listed up to 3-hours in accordance with ASTM E814 (UL 1479) and CAN/ULC S115

SELF-CONTAINED FIRESTOP: Self-contained, graphite free highly-intumescent products designed to firestop a wide variety of through-penetrations including cable trays, conduit and blank openings

ACHIEVABLE SMOKE SEAL: L-Rating (smoke seal) achievable when used in conjunction with 3M Fire Barrier Moldable Putty

BUILDING CODE COMPLIANCE – seals openings through fire barriers where mechanical services pass through

HELPS PREVENT FIRE SPREAD - capable of expanding a minimum of 3 times its dried volume when exposed to temperatures above 1000°F (538°C)

ONE PRODUCT, MANY USES – listed in hundreds of UL Firestop systems with up to 4-hour ratings

Safe and Durable in Use: This bathtub sealing tape is made of high-quality PVC material, waterproof, sturdy and durable

Flexible and DIY: Flexible PVC sealing strip with crease design, so it could be folded into 90 degrees for tightly sealing in the seams between walls

Convenience to Use and Operate: It has glue on the rear, very convenient to use, you can tear and stick it on the corresponding area directly. But before sticking, please keep the sticking surface clean and dry

Firestop tested up to 3 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115

Fire resistive joint system tested up to 4 hours in accordance with ASTM E 1966 (UL 2079)

Continuous seal remains pliable and allows for typical pipe movement

TESTED AND LISTED: For through-penetrations up to 3-hours in accordance with ASTM E814 (UL 1479) and CAN/ULC S115. Provides L-Rating (smoke seal)

TESTED AND LISTED: For construction joints up to 4-hours in accordance with ASTM E1966 (UL 2079) and CAN/ULC S115

ACRYLIC LATEX-BASED SEALANT: Offers an economical alternative to firestopping metal pipes or cables through concrete or gypsum, and in dynamic head-of-wall systems

FIRESTOP TESTED: Tested and listed up to 2-hours in accordance with ASTM E814 (UL 1479) and CAN/ULC S115

STC RATED: Has an STC rating of 57 when tested in a STC 57-rated wall assembly

VOLUME EXPANDING PROPERTIES: Two-part urethane, smoke, sound and firestopping foam designed to expand up to 5 times in volume after dispensing

TESTED FIRESTOP PERFORMANCE: Tested and listed up to 3-hours in accordance with ASTM E814 (UL 1479) and CAN/ULC S115

SELF-CONTAINED FIRESTOP: Self-contained, graphite free highly-intumescent products designed to firestop a wide variety of through-penetrations including cable trays, conduit and blank openings

ACHIEVABLE SMOKE SEAL: L-Rating (smoke seal) achievable when used in conjunction with 3M Fire Barrier Moldable Putty