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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M-D Building Products 71480 1/2-Inch by 20-Feet Backer Rod,

Product ID: 256128197

Details

Brand
M-D Building
Colour
Gray
Item form
Foam
Item weight
9 g
Maximum gap fill
0.5 Inches

💧Waterproof polyethylene foam

📏0.5-inch max gap fill

🧱20 feet continuous length

€ 31.63

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal smarter, not harder — your gap-filling game changer!

SEAL LIKE A PRO - Effortlessly fills large gaps up to 1/2 inch, blocking drafts and boosting energy efficiency.
TRUSTED QUALITY - Highly rated with 4.6 stars from thousands of pros and DIYers alike.
LONG LASTING COVERAGE - 20 feet of durable backer rod per pack ensures you’re ready for any project size.
PERFECT CAULKING BASE - Creates a smooth, sound surface for flawless caulking finishes every time.
WATERPROOF RESILIENT - Made from waterproof polyethylene foam, it stands up to moisture and weather challenges.

The M-D Building Products 71480 Backer Rod is a 1/2-inch thick, 20-foot long polyethylene foam rod designed to fill large gaps and openings. Waterproof and easy to use, it provides an ideal base for caulking, preventing drafts and enhancing insulation. Trusted by professionals and DIY enthusiasts, it delivers reliable, durable performance for weatherization and building projects.

Specifications

ASIN	B000BQWOC0
Best Sellers Rank	#64,509 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #141 in Raw Building Materials
Brand Name	M-D Building Products
Color	Gray
Customer Reviews	4.6 4.6 out of 5 stars (3,776)
Global Trade Identification Number	00043374714807
Item Form	Foam
Item Type Name	Backer Rod
Item Weight	9 g
Manufacturer	M-D Building Products
Material Type	Polyethylene (PE)
Maximum Gap Fill	0.5 Inches
Model	71480
Number of Items	1
Number of Packs	1
Part Number	71480
Surface Recommendation	wall
UPC	043374714807
Unit Count	1.0 Count
Water Resistance Level	Waterproof

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