Roof and floor of truck, do i need to put on top of butyl or will this work by itself?

Thank you for your question. For floor and roof installation, we always recommend Siless 80 mil first and then Siless Liner 157 mil on the top of it.

Will this work on the underside of the car as a heat barrier/shield from the exhaust

I think the foam would melt or burn and get too hot if it was real close to the exhaust pipe underneath the car. probably wouldnt stick well to the dirty underside anyway. However, if you apply it on the inside of car body above the exhaust area you will lessen the flow of heat (and noise) into the interior. You can also apply several layers to increase the R value.

Would this work goodon my van walls

Thank you for your question. Yes, it will be good for your van walls.

What is the thickness of the foam? Could it be cut into a one or two inch strip and wrapped around a 3" tube? Does it scratch easily?

It is 157 Mil 37.5 Sqft. Yes, you could cut it into one or two inch strips. It has self adhesive side, and you can install it around a 3" tube. It is not easy to scratch it, but everything depends on the environment where you install it.

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🚗 Stay cool, quiet, and in control with Siless – the smart driver’s thermal armor!

ULTIMATE HEAT SHIELD - Siless Liner blocks up to 98% of radiant heat, keeping your ride cooler in summer and warmer in winter.
EFFORTLESS INSTALLATION - Self-adhesive backing and flexible design make installation quick and roller-friendly—no professional needed.
COST EFFECTIVE EXCELLENCE - Get premium thermal insulation at over 3x less cost per sqft compared to competitors—quality that saves your wallet.
PREMIUM THICKNESS DURABILITY - At 157 mil (4mm) thickness, this closed-cell foam resists crushing, tearing, and moisture for long-lasting performance.
VERSATILE SOUND VIBRATION DEADENER - Not just heat—this liner also dampens vibrations and noise, enhancing your vehicle’s comfort and quietness.

Siless Foil Liner is a 157 mil thick, closed-cell polyethylene foam with an aluminum finish designed for automotive thermal insulation and sound deadening. Covering 36 sqft per roll, it blocks 98% of radiant heat, is waterproof, oil-resistant, and self-adhesive for easy installation. Durable and cost-effective, it enhances vehicle comfort by reducing heat, noise, and vibrations while preventing moisture-related damage.

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€ 243.32

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Finlandstore

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Manufacturer	Siless
UPC	753068062380
Part Number	SLF36
Product Dimensions	839.98 x 39.98 x 0.1 cm; 1.34 kg
Item model number	157 mil 36 sqft
Item Package Quantity	1
Coverage	36 square foot
Batteries included?	No
Batteries Required?	No
Item Weight	1.34 kg

SilessFoil Liner 157 mil 36sqft Car Sound Deadening Mat

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