How is everyone securing this to their rv windows? we don’t want to use spray adhesive as suggested by a few reviews. thanks.

We used industrial strength Velcro. Lined the edges and bottom of each window just outside the window frame and cut the insulation to match. The industrial strength Velcro adhesive has continued to hold up even with 100+ degree days. This way we can remove it when we want. And it doesn’t look bad - nice and tidy over the windows.

What is the R Value of the 5mm?

In the description... R-value up to 15.67 ( with one layer), up to 21.10 ( with two layers).

Has anyone used this over crawl space vents to keep it warmer during winter?

It would work well, cut 3/8" larger than both dimensions and press fit. I should caution you, unless you are having a problem with freezing pipes, you should never close the vents in the winter, moisture will collect on the underside of the house above the insulation causing mold. Air movement in the un-conditioned space under your house is critical.

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SmartSHIELD -5mm 24''X50ft Reflective Insulation Roll, Foam Core Radiant Barrier, Thermal Foil Insulation - Engineered Foil

SmartSHIELD -5mm 24''X50ft Reflective Insulation Roll, Foam Core Radiant Barrier, Thermal Foil Insulation - Engineered Foil

Product ID: 426021733

Details

Material
Foam
Brand
INSULATION
Coverage
[Broad]
Item thickness
5 Millimetres
Recommended uses for product
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💧Vapor & mold resistant barrier

🔥Reflects 95% radiant energy

🛡️Class A Fire Rating certified

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Description

🛡️ Stay cool, save green, and shield your space in style!

ECO SMART INVESTMENT - Non-toxic, allergy-free insulation that pays for itself by reducing heating and cooling costs.
MOISTURE MOLD SHIELD - Vapor barrier technology prevents condensation and resists mold, even in humid environments.
DURABLE USER FRIENDLY - Tear and puncture proof yet easily cut with scissors for hassle-free installation.
ULTIMATE THERMAL DEFENSE - Reflects up to 95% of radiant heat, slashing energy bills year-round.
CERTIFIED SAFETY ASSURANCE - Meets ASTM C1313 standards with a top-tier Class A fire rating for peace of mind.

SmartSHIELD -5mm Reflective Insulation Roll combines advanced engineered foil and foam core technology to reflect 95% of radiant heat, offering an R-value up to 21.10 with dual layers. It features a Class A fire rating, vapor barrier protection against moisture and mold, and industrial-grade durability that’s easy to install. Designed to reduce energy costs while ensuring safety and comfort, this non-toxic insulation is the smart choice for modern homes and commercial spaces.

Specifications

Product dimensions	15.24L x 0.61W metres
Manufacturer	Insulation Market Place LLC
UPC	686091709390
Part Number	SmartSHIELD -5
Item model number	SmartSHIELD -5
Size	24''X50ft Thickness: 5mm
Colour	Engineered Foil
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No
Item Weight	1.34 kg

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