Silicone, Boss 323 Hi-Temp Gasket Maker, 8 oz. Can, Blue

Silicone, Boss 323 Hi-Temp Gasket Maker, 8 oz. Can, Blue

Marsoni

M251S

$23.90

Get it in 3 business days with 1 day shipping. Friday, May 29

Silicone, Boss 323 Hi-Temp Gasket Maker, 8 oz. Can, BlueMuli Purpose Silicone Sealant BOSS 323 Hi Temp Blue Gasket Maker is a one part, nonslumping paste that cures to a tough, rubbery solid at room temperature on exposure to vapor in the air. This silicone was formulated to perform at temperatures ranging from 85F to 400F ( 65C to 204C). BOSS 323 is non corrosive and oxygen sensor safe.

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I’ve been using these for several days now and I did notice a difference. I tend to get hot while sleeping, so I was curious if they would actually help, and they do feel cool when you lay on them. I also like that they’re soft and comfortable, not that weird texture some “cooling” products have. So far, I’ve been really happy with them.

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Reviewed in the United States on May 23, 2026

Verified Purchase

Iris

Houston, US

★★★★★ 5

Definitely recommend

Color: White, Size: Queen (20" X 30")

I highly recommend this pillow case. With two sides it is easy to stay comfortable as the weather changes. The cooling side is nicely cool to touch and both sides are incredibly soft. The size is also good.

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Reviewed in the United States on May 26, 2026

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Marcus Meiklejohn

Chelsea, US

★★★★★ 5

Nice & cool

Color: Beige, Size: King (20" X 36")

These are the best pillowcases! I love having a cooling side for summer and a warm side for winter. I can't imagine switching back to normal cotton pillowcases after using these. They zip on so they stay on unlike regular pillowcases.

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Reviewed in the United States on May 11, 2026

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ROB

Lake Worth, US

★★★★★ 4

Nice pillowcases that stay cool

very soft and seem to stay cool!

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Reviewed in the United States on April 29, 2026

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SARAH HAPNER