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

MD Building Foam Backer Rod, Gray, 1/2in x 20ft for Medium Gaps

Product ID: 4877844

Details

Brand
M-D Building
Color
Gray
Item Form
Specialty
Item Weight
9.07 g
Maximum Gap Fill
0.5 inches

🧱0.5in max gap fill

✂️Easy scissors cutting

🌧️Waterproof & weather-resistant

S/.47

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Description

🛠️ Seal the deal with MD Building Foam — where precision meets protection!

SEAL LIKE A PRO - Closed-cell foam blocks drafts, moisture, dust, and insects for year-round comfort.
CUT TO FIT NO FUSS - Easily trims with scissors for a perfect, custom fit every time.
VERSATILE GAP MASTER - Ideal for concrete joints, window sills, doors, and expansion gaps—your all-in-one weatherization hero.
BUILT TO LAST OUTDOORS - Weather-resistant design ensures durability in any climate, indoor or outdoor.
CAULK SMARTER NOT HARDER - Prevents caulk waste by providing a sturdy, reliable base for flawless sealing.

The MD Building Foam Backer Rod is a 1/2 inch by 20-foot closed-cell foam strip designed to fill medium gaps up to 0.5 inches. Its waterproof, weather-resistant material blocks drafts, moisture, dust, and insects, making it perfect for both indoor and outdoor use. Easy to cut with scissors and install, it provides a durable base that prevents caulk waste and enhances sealing performance across a variety of applications including concrete joints, window sills, and expansion gaps.

Specifications

ASIN	B000BQWOC0
Best Sellers Rank	#1,711 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #17 in Weather Stripping
Brand Name	M-D Building Products
Color	Gray
Customer Reviews	4.6 4.6 out of 5 stars (5,324)
Global Trade Identification Number	00043374714807
Included Components	1 Foam Backer Rod Roll
Item Form	Specialty
Item Type Name	Backer Rod
Item Weight	9.07 g
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 Count
Water Resistance Level	Waterproof

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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S/.47

Duties & taxes included

In stock

Sold byAmazon PeruDelivered 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 Peru.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The delivery time was excellent, and the packaging was secure.

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