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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🛠️ 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.

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