3M Fire Block Sealant FB 136, Gray Color, Single Component, High Temperature and Smoke Passage Resistant, 10.1 fl oz Cartridge
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3M Fire Block Sealant FB 136, Gray Color, Single Component, High Temperature and Smoke Passage Resistant, 10.1 fl oz Cartridge

4.4/5
Product ID: 100223598
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Details

  • Color
    Gray
  • Brand
    3M
  • Item Weight
    1 Pounds
  • Liquid Volume
    10.1 Fluid
  • Initial Hardening Time
    15 minutes
💧Easy Cleanup: Water-Based
🔥Heat Resistance: 2000°F
🧱Versatile Bonding: Multiple Surfaces

Description

🔥 Seal the Deal with Fire-Resistant Confidence! 🔥

  • STAYS PUT - Designed to resist sagging or running, even in vertical or overhead applications.
  • EFFORTLESS CLEANUP - Water-based formula allows for quick and easy installation and disposal.
  • VERSATILE APPLICATION - Bonds seamlessly to concrete, metals, wood, plastic, and cable jacketing for all your sealing needs.
  • UNMATCHED HEAT RESISTANCE - Withstands temperatures up to 2000°F, ensuring safety in high-heat environments.
  • DRAFTSTOPPER EXTRAORDINAIRE - Inhibits air circulation to minimize drafts and enhance energy efficiency.

The 3M Fire Block Sealant FB 136 is a high-performance, lightweight cementitious sealant designed for industrial use. It offers exceptional adhesion and heat resistance up to 2000°F, making it ideal for a variety of surfaces including concrete, metals, wood, and plastic. Its water-based formula ensures easy cleanup, while its unique properties prevent sagging and inhibit air circulation, providing a reliable solution for high-temperature and smoke passage applications.

Have a Question? See What Others Asked

Is this paintable?
Would this be good to use around a dry stack fireplace where cold air pours in through the cracks?
Is it waterproof. I want use between a Weber grill and granite countertop
What happens if this is used in an exterior application?

Reviews

4.4

All from verified purchases

H**H

Works great.

I used this to fill in the electrical hole and floor anchor holes. The product is as described. Seals great and eliminated air flow. Easy to apply and fills in very well. Don’t get this stuff where you don’t want it, can be difficult to clean. Once dryer the plastic caps in the safe were secured and don’t pop out. Extremely durable. Can be cut with a razor blade to add a nice finished look.

M**Y

It works

I used this to apply a rope gasket to an outdoor stove as it cost much less than others. It worked very well.

P**E

Great product was very easy to work with

Never used this product before. Had to fix a few cracks around the chimney from the vent pipes. Was really easy to spread as needed easy clean up. Really matched the cider blocks. I will be using it again if I run into the same problems.

H**L

It worked

It done the job so far

R**R

Excellent sealant for high heat applications

I bought this to seal up a stove vent where it exits the siding. It does a great job sealing and protecting siding from heat

R**.

Worked

Used it to seal around ceiling light electrical box. Was kind of runny at first but did the job.

B**L

Garbage.

Doesn't stick nor will it hold up to the heat. At 400 degrees it becomes very brittle and falls off.

W**Y

Fire “block”… try Fire “Break an arm to dispense.”

I’m really hopeful this product works as advertised if only because it has no business in a caulking gun and I never want to have to use it again. Used it to close some gaps in our fireplace masonry, but it’s more like spreadable putty than caulking. I nearly broke both arms trying to dispense 2 tubes of it, even after hitting the “F it” button and cutting the tip so wide, it should have been easily dispensed. Any harder, and I’d have been breaking out woodworking clamps to squeeze the caulking gun handle.

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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96 Lei

Duties & taxes incl.

Romaniastore
1
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15 dayswithout membership

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

3m Fire Block Sealant Fb 136 Gray Color Single Component | Desertcart Romania