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 71551 Backer Rod

Product ID: 334455983

Details

Brand
M-D Building
Colour
Grey
Item form
Foam
Item weight
0.01 Ounces
Maximum gap fill
0.5 Inches

💧Water resistant foam

💪Tensile strength 35 PSI

🧱Max gap fill 0.5 in

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AR$326849

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Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal smart, save energy, and stay cozy all year round!

BUILT TO LAST - Durable acrylic silicone foam with 35 PSI tensile strength
TRUSTED BY THOUSANDS - 4.6-star rating from nearly 4,000 users proves reliability
VERSATILE APPLICATION - Ideal for general construction surfaces and weatherization projects
WEATHERPROOF YOUR SPACE - Water-resistant design keeps moisture and drafts out
SEAL EVERY GAP LIKE A PRO - Perfectly fills up to 0.5-inch gaps for airtight insulation

The M-D Building Products 71551 Backer Rod is a high-performance acrylic silicone foam rod designed to fill gaps up to 0.5 inches. With a tensile strength of 35 PSI and water-resistant properties, it effectively blocks drafts and moisture, enhancing insulation for indoor and outdoor construction projects. Trusted by thousands with a 4.6-star rating, it’s a reliable choice for professional-grade weatherization and sealing.

Specifications

ASIN	B00C1TGKZW
Best Sellers Rank	#79,768 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #158 in Raw Building Materials
Brand Name	M-D Building Products
Color	Grey
Customer Reviews	4.6 4.6 out of 5 stars (3,841)
Global Trade Identification Number	00043374715514
Included Components	Backer Rod
Item Form	Foam
Item Type Name	Backer Rod
Item Weight	0.01 Ounces
Manufacturer	M-D Building Products
Material Type	Acrylic Silicone
Maximum Gap Fill	0.5 Inches
Model	MD Building - 71551
Number of Items	1
Part Number	4962239
Surface Recommendation	General Construction Surfaces
Tensile Strength	35 Pounds Per Square Inch
UPC	043374715514
Unit Count	1.0 Count
Water Resistance Level	Water Resistant

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