Floor & Tunnel Shield II™ - 21" x 48"

*DO NOT apply directly to exhaust components.
(2 reviews)
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Floor & Tunnel Shield II™ solves the problem of needing a high heat barrier to block heat from any source intruding into interiors and damaging components and electronics.

Use as a barrier to reflect and insulate from any heat source. Designed to provide the best possible heat protection in areas where high temperatures are always present and problematic, Floor & Tunnel Shield II limits heat transfer on fire walls, transmission tunnels, floor boards, fuel cells and other areas where heat is an issue. Floor & Tunnel Shield II provides excellent light weight thermal protection, acts as a guard against track and road debris, and provides sound deadening as well. Constructed with an embossed 10 mil aluminum face bonded to 1/8" composite glass-fiber core and backed with a high temp super strong pressure sensitive backing, Floor & Tunnel Shield II withstands up to 1750°F. The adhesive side holds past 450°F. Its improved multifaceted modern aluminum surface offers improved reflection and rigidity and allows for ease of installation - aluminum side must face the heat source. At only 3/16" thick, this product can be shaped and trimmed for a custom fit and is ideal for minimal clearance areas. With a unique and patented finely woven glass-fiber backing, Floor & Tunnel Shield II is the easiest, most cost effective way to control thermal transfer while protecting expensive components and vehicle occupants from extreme heat situations and sound. Floor & Tunnel Shield II can be used on any number of surfaces including, metal, aluminum, carbon fiber, plastic, and more. Multiple uses include: fire walls, under hoods, transmission tunnels, floor pans, fuel cells, and exterior under vehicle locations - anywhere to reflect damaging heat.

  • 10 mil dimpled aluminum face
  • Protection for engine compartments
  • Protection for painted body parts
  • Comfortable interior at any temperature
  • Hi-temp adhesive for a "do-it-once" install
  • Extreme heat barrier - aluminum side should face the heat
  • Only 3/16" thick
  • Use as barrier to reflect and insulate from any heat source
  • Great for exterior applications

*DO NOT apply directly to exhaust components.


Frequently Asked Questions:
FAQ 050501.pdf
Installation Instructions:


  • 5
    Great for bus conversions!

    Posted by Lily on May 27th 2022

    The engine cover for my school bus that I'm converting (@destinationsundiscovered) needed protection for the underside. I asked around and did some searching and came across Design Engineering. I contacted their customer service and asked what would be the best product to use, and this was recommended. They were a great help and this product was easy to work with. The engine cover is awkwardly shaped, but the tunnel shield was easy to cut and mold to how I needed it. If I need anymore products, this will be the first place I go to!

  • 5
    Awesome performance

    Posted by Patrick on Mar 6th 2022

    Have used this on several firewalls and trans tunnels and it works great. Really kept a LOT of heat out of the interior and also helped cut down on the sound a little. Will be buying more for the next build.