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.

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.

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.

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MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps | Closed-Cell Foam, Prevents Caulk Waste, Cuts With Scissors, Blocks Drafts Moisture Dust Insects, Indoor/Outdoor

Product ID: 4877844

Details

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

✂️Easily trim to size

🌧️Waterproof & weather-resistant

🛠️0.5in max gap fill

119 kr

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Description

🛡️ Seal smart, save energy, and upgrade your space effortlessly!

EFFORTLESS CUSTOM FIT - Trim or twist to perfectly match any joint or crack size
PRECISION GAP FILLING - Seals up to 0.5-inch gaps for airtight, draft-free spaces
UNIVERSAL APPLICATION - Ideal for concrete, expansion joints, window sills, and more—indoor or outdoor
WEATHERPROOF DURABILITY - Built to withstand rain, sun, and temperature swings without degrading
QUICK CLEAN INSTALLATION - Push in place and caulk over—no messy adhesives needed

The Versatile Gray Foam Backer Rod Set by M-D Building Products is a 20ft roll of high-quality, waterproof foam designed to fill and seal gaps up to 0.5 inches. Perfect for concrete joints, expansion gaps, and crack filling, it enhances caulking durability and energy efficiency. Easy to trim and install, it’s a must-have for professionals and DIYers aiming for long-lasting, weather-resistant seals indoors and outdoors.

Specifications

ASIN	B000BQWOC0
Best Sellers Rank	#1,639 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Weather Stripping
Brand Name	M-D Building Products
Color	Gray
Customer Reviews	4.6 4.6 out of 5 stars (3,950)
Global Trade Identification Number	00043374714807
Included Components	1 Foam Backer Rod Roll
Item Form	Specialty
Item Type Name	Backer Rod
Item Weight	0.02 Pounds
Manufacturer	M-D Building Products
Material Type	Foam
Maximum Gap Fill	0.5 Inches
Model	71480
Number of Items	1
Part Number	71480
Surface Recommendation	wall
UPC	043374714807
Unit Count	1.0 Count
Water Resistance Level	Waterproof

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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119 kr

Duties & taxes included

In stock

Sold byAmazon DenmarkDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Denmark.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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