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Metacaulk 835+ Elastomeric Silicone Firestop Sealant
The Metacaulk 835+ Elastomeric Silicone Firestop Sealant is a one-component, fire-rated silicone sealant designed for through-penetration firestop applications. It prevents the spread of flames, smoke, gas, and water through penetration openings while providing flexibility for systems where dynamic movement is expected.
Silicone-based and moisture-cured, Metacaulk 835+ provides excellent durability, moisture resistance, and movement capability. It is suitable for interior and exterior applications, including expansion joints, contraction joints, control joints, and penetrations in fire-rated walls and floors.
Key Features

One-component elastomeric silicone firestop sealant.

Designed for through-penetration firestop systems.

Prevents spread of flames, smoke, gas, and water.

Suitable for applications requiring dynamic movement.

Flexible and non-slump formula.

Neutral moisture cure with low odor.

Excellent moisture resistance.

Protected against mold growth with a combination of biocides.

No mixing or additives required.

STC rating of 55.

FBC System Compatible for use with approved Flow Guard Gold, Blaze Master, and Corzan pipe and fittings.

DOT classification: Not regulated.

Available in caulk grade and self-leveling grades.

Can be applied with caulking gun, trowel, or pumping equipment.

Common Applications

Electrical penetrations.

Plumbing penetrations.

Telecommunications penetrations.

Fire-rated gypsum wallboard partitions.

Concrete block walls.

Concrete walls and floors.

Curtain wall and floor joint applications.

Expansion joints.

Contraction joints.

Control joints.

Interior and exterior firestop applications.

Cable protection applications.

Product Information

Specification
Details

Product Name
Metacaulk 835+ Elastomeric Silicone Firestop Sealant

Brand
Metacaulk

Sealant Type
One-component silicone-based firestop sealant

Application
Through-penetration firestop, joints, and fire-rated wall/floor penetrations

Available Grades
Caulk Grade and Self-Leveling

Cure Type
Neutral moisture cure

Color
—

Movement Capability
Designed for dynamic movement applications

Available Product Options

SKU
Product Name

66295
Metacaulk 835+ Spray, 5 gal Fast Cure Silicone

66019
Metacaulk 835+, 5 gal

66300
Metacaulk 835+ Caulk Grade, 20.2 oz Sausage

66301
Metacaulk 835+ Self Leveling, 20.2 oz Sausage

66645
Metacaulk 835+, 10.15 oz Cart

 
Frequently Asked Questions (FAQ)
Q1. What is Metacaulk 835+ used for?Metacaulk 835+ is used for firestopping through-penetration openings, joints, and penetrations involving electrical, plumbing, and telecommunications systems.
Q2. What makes Metacaulk 835+ different from standard firestop sealants?Its silicone-based elastomeric formula provides flexibility and movement capability, making it suitable for applications where expansion, contraction, or dynamic movement is expected.
Q3. Can Metacaulk 835+ be used outdoors?Yes. It can be used for approved interior and exterior applications, including expansion, contraction, and control joints.
Q4. Does Metacaulk 835+ require mixing before installation?No. It is a single-component sealant that requires no mixing or additional additives.
Q5. What application methods can be used with Metacaulk 835+?It can be applied using a conventional caulking gun, trowel, or pumping equipment depending on the product grade and application requirements.
Brand:MetacaulkSKU:66645Tags:Fire Safety, Firestop SealantsSize:5 Gallon Fast Cure Silicone, 5 Gallon Metacaulk 835+, 20.2oz Caulk Grade - Case of 12, 20.2oz Self Leveling - Case of 12, 10.15oz - Case of 12