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 ride upgrade you can’t afford to miss!

HEAVY DUTY DURABILITY - Closed-cell PE foam resists oil, water, rust, and crushing for long-lasting performance.
EFFORTLESS INSTALLATION - Self-adhesive backing and flexible foam make upgrades quick and mess-free—no roller needed.
ULTIMATE THERMAL SHIELD - Siless Liner slashes heat transfer by 98%, keeping your ride cool or cozy year-round.
LIGHTWEIGHT YET POWERFUL - At just 1.34 kg for 36 sqft, it delivers premium insulation without weighing down your vehicle.
COST EFFECTIVE EXCELLENCE - Premium aluminum foil finish and thermal barrier at over 3x less cost than competitors.

Siless Liner is a 157 mil thick, closed-cell polyethylene foam with an aluminum foil finish designed for automotive sound deadening and heat insulation. Covering 36 square feet per roll, it blocks 98% of radiant heat, is waterproof, oil-resistant, and crush-resistant. Its self-adhesive backing ensures easy installation, making it an affordable, durable, and highly effective thermal barrier for vehicle interiors and engine compartments.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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

Siless Liner 157 mil 36 sqft Aluminum Foil Finish Car Sound Deadening & Heat Insulation Closed Cell Foam - PE Foam Sound Deadener

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