Metacaulk 1000 Firestop Sealant

The Metacaulk 1000 Firestop Sealant is a one-component, intumescent, fire-rated sealant designed for construction joints and through-penetration firestop applications. This water-based, VOC-compliant sealant cures to a flexible elastomeric seal that helps prevent the spread of flames, smoke, hot gases, and water through fire-rated assemblies.

Designed for both new construction and retrofit applications, Metacaulk 1000 provides reliable fire protection for dynamic movement joints and penetrations. It requires no mixing or dilution and offers excellent adhesion, mold resistance, freeze-thaw durability, and paintability for interior applications.

Key Features

• One-component intumescent firestop sealant.

• Provides up to 4 hours of fire protection.

• Expands when exposed to heat to block flames, smoke, and hot gases.

• Water-based, VOC-compliant formula.

• Non-sag consistency for easy application.

• Cures to a flexible elastomeric seal.

• Suitable for dynamic movement applications.

• No mixing or dilution required.

• Protected against mold growth with biocides.

• Excellent freeze-thaw resistance.

• Paintable after curing.

• STC rating of 62 for sound control.

• Tested to ASTM E814, UL 1479, UL 2079, and CAN/ULC-S115 standards.

• Clean Air Gold Certified.

• FM Approved 3971 and 4990.

Common Applications

• Construction joints.

• Vertical and horizontal fire-rated joints.

• Through-penetration firestop systems.

• Pipe penetrations.

• Conduit penetrations.

• Cable penetrations.

• Concrete walls and floors.

• Gypsum wall assemblies.

• Interior fire-rated construction.

Product Information

Specification	Details
Product Name	Metacaulk 1000 Firestop Sealant
Brand	Metacaulk
Sealant Type	One-component intumescent firestop sealant
Application	Construction joints and through-penetration firestop systems
Fire Rating	Up to 4 Hours
STC Rating	62
Certifications	ASTM E814, UL 1479, UL 2079, CAN/ULC-S115, Clean Air Gold Certified, FM Approved 3971 & 4990

Available Sizes

SKU	Product
66303	30 oz Cartridge
66309	5 Gallon Pail
66312	20.2 oz Sausage
66640	10.3 oz Cartridge

 

Frequently Asked Questions (FAQ)

Q1. What is Metacaulk 1000 Firestop Sealant used for?
Metacaulk 1000 is used to firestop construction joints and through-penetration openings around pipes, conduits, and cables in fire-rated wall and floor assemblies.

Q2. How does Metacaulk 1000 provide fire protection?
Its intumescent formula expands when exposed to heat, helping seal openings against flames, smoke, hot gases, and water.

Q3. Does Metacaulk 1000 require mixing before application?
No. It is a ready-to-use, one-component sealant that requires no mixing or dilution.

Q4. Can Metacaulk 1000 be painted after curing?
Yes. Once fully cured, the sealant can be painted to match surrounding interior surfaces.

Q5. What fire rating does Metacaulk 1000 provide?
Metacaulk 1000 provides fire-rated systems for up to 4 hours when installed in accordance with approved tested assemblies.