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M-D Building Products - Versatile Gray Foam Backer Rod Set 1/2in x 20ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71480)

M-D Building Products - Versatile Gray Foam Backer Rod Set 1/2in x 20ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71480)

Q: Is it safe to use near hot water baseboard radiators? I want to use it behind radiator cover as a temporary fix for a cold draft.

I suspect it would be safe if between the wall and the top cover of the baseboard, assuming you have standard baseboard covers like mine -- which never get super hot. It's foam, and will likely melt if too close to a heat source. To be on the safe side, I'd suggest first contacting the company directly.

Q: I live in an apartment and i feel a draft coming through the cracks of my window would this help? Im trying to avoid using weather tape

I purchased the medium backer rod and they are 1/2" thick. I think the one I purchased would be too thick to insert into the crack of your windows. Maybe there is a smaller version that would work for you.

Q: What caulking do u need for this ?

I did use caulk as it was used to support a garage door seal as the bottom of the door.

Product ID: 4877844

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Details

Color
Gray
Brand
M-D Building
Item Weight
0.02 Pounds
Item Form
Foam
Maximum Gap Fill
0.5 Inches

🧱20ft length for extensive coverage

🌦️Weather-resistant for indoor/outdoor use

🛠️1/2in diameter fits medium gaps perfectly

Frequently Bought Together

M-D Building Products - Versatile Gray Foam Backer Rod Set 1/2in x 20ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71480)

M-D Building Products - Versatile Gray Foam Backer Rod - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling, 3/8 by 20 Feet, (Pack of 2) (71464)

Sikaflex Self Leveling Sealant, Gray, polyurethane with an accelerated curing capacity for sealing horizontal expansion joints in concrete, 10.1 fl. oz Cartridge

Description

🛠️ Seal smarter, live cozier — don’t let gaps steal your comfort!

BUILT TO LAST - Crafted from premium weather-resistant foam for year-round reliability.
SEAL LIKE A PRO - Creates a durable, airtight barrier that blocks drafts and dust.
MULTI PURPOSE MASTER - Ideal for concrete joints, expansion gaps, and insulating doors or windows.
CUSTOM FIT EVERY TIME - Easily trims and twists to perfectly fill any medium-sized gap.
EFFORTLESS INSTALLATION - Push-in design means no messy adhesives or complicated tools required.

The M-D Building Products Versatile Gray Foam Backer Rod Set offers a 20ft, 1/2in diameter foam rod designed to fill medium gaps in concrete, expansion joints, and cracks. Made from durable, weather-resistant material, it ensures long-lasting sealing indoors and outdoors. Easy to install without adhesives, it enhances caulking adhesion, improves insulation, and prevents drafts, making it an essential tool for professional-grade home sealing and comfort.

Have a Question? See What Others Asked

Is it safe to use near hot water baseboard radiators? I want to use it behind radiator cover as a temporary fix for a cold draft.

Can you use barge glue and plastidip

I live in an apartment and i feel a draft coming through the cracks of my window would this help? Im trying to avoid using weather tape

What caulking do u need for this ?

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