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6mm Foil-Backed Self-Adhesive Insulation

6mm Foil-Backed Self-Adhesive Insulation

Best price now

$16.18at Home DepotChecked 1 h ago

48% under what the other stores charge

Compared across 4 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $16.18 at Home Depot (checked Nov 11, 2026).
  • Checked at 4 stores.

Our take on the 6mm Foil-Backed Self-Adhesive Insulation

This is a 6mm closed-cell foam sheet with an aluminum foil face and a peel-and-stick backing, sold in 9.84 by 7.09 in pieces. The foil reflects radiant heat while the foam core slows air convection, so it works as both a thermal and acoustic barrier. It is aimed at vehicle, campervan, boat and workshop interiors where panels are uneven and hard to line. Against plain foil bubble wrap it is thicker and semi-rigid, which helps on curved surfaces, but it is not a structural or fire-rated building insulation.

Best forCampervan and van wall, floor and ceiling liningBoat cabin and engine bay sound dampingWorkshop and shed panel insulationDIYers lining uneven or curved surfaces
Pros
  • Foil face reflects radiant heat
  • Closed-cell foam resists moisture
  • Self-adhesive backing speeds installation
  • Semi-hard foam flexes and springs back after impact
  • Cuts to size with a knife
Cons
  • Small sheet size means many seams on large panels
  • Adhesive grip depends on a clean, dust-free surface
  • Not a substitute for fire-rated or structural insulation
  • Thin 6mm layer gives modest thermal gain on its own

6mm Foil-Backed Self-Adhesive Insulation prices at every store

  • Swift DealsNew

    In stockReturn policy

    $31.00Checked 53 min ago
    Visit Swift Deals
  • Home DepotNew

    Availability unknown

    $16.18Free shippingChecked 1 h ago
    Visit Home Depot
  • eBayNew

    Availability unknownSold by lielim63

    $22.84Free shippingChecked 1 h ago
    Visit eBay
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $39.44+ $4.99 shippingChecked 52 min ago
    Visit Amazon

Store links may earn us a commission.

6mm Foil-Backed Self-Adhesive Insulation price history

Lowest price we've seen: $16.18 on Nov 11 at Home Depot. Tracked across 3 stores since Nov 11.

About the 6mm Foil-Backed Self-Adhesive Insulation

This is a 6mm foil-backed insulation with a self-adhesive back. It has a reflective aluminum foil surface over a closed-cell foam core. It is meant mainly as a thermal insulation layer that reflects radiant heat and limits heat transfer.

The foam is semi-hard, flexible and elastic, and it springs back to shape even after a strong impact. The surface is waterproof and moisture-resistant.

Facing
Aluminum foil
Core
Foam with a closed-cell structure of fine, independent bubbles
Density
Semi-hard foam
Insulation type
Thermal and acoustic
Thermal type
Radiation (reflective radiant barrier)
Moisture resistance
Waterproof and water-resistant
Installation
Self-adhesive backing
Suitable surfaces
Uneven surfaces
Flexibility
Elastic; restores its shape automatically, even after strong impact
Length
9.84 in
Width
7.09 in
Weight
4 lb

Specifications

Form
Foam
Moisture Resistance
Waterproof, Water resistance
Product Type
Sound-Deadening Kit, Reflective Insulation Foam Radiant Barrier
Insulation Type
Acoustic, Thermal
Insulated Plasterboard
No
Reflective Type
Foam Core
Thermal Type
Radiation
Material Type
Reflective Insulation
Facing
Aluminum Foil
Material Composition
Aluminum Foil
Density
Semi-hard foam
Suitable Surfaces
Uneven surfaces
Installation Method
Self-Adhensive
Length
9.84 in
Width
7.09 in
Flexibility
Elastic
Compressibility
Automatically restore (even if subjected to strong impact)
Weight
4 lb
Texture
Delicate independent bubble structure, Closed cell structure
Solution For
Isolates energy exchange caused by air convection

Questions and answers

What does 6mm foil-backed insulation actually do?
The aluminum foil reflects radiant heat and the closed-cell foam core slows air convection. Together they reduce heat transfer and add some sound damping.
Can it be used in a campervan or boat?
Yes. It is made for vehicle, campervan, caravan, boat and workshop interiors. The semi-hard foam bends around curves and recovers after impact.
Is it waterproof?
The closed-cell foam and foil facing resist moisture. Seal the seams well if you are lining a damp area.
How do I install it?
Peel the backing and press it onto a clean, dry surface. Cut pieces with a knife or scissors and work in sections on uneven panels.
Does it work as sound deadening?
It reduces some noise and vibration, mainly as a barrier layer. For serious engine or road noise, pair it with a dedicated mass-loaded vinyl or butyl product.
Can I order one long continuous piece?
Matching lengths in the same order are joined into one continuous piece up to the roll length. Contact the seller before ordering if you need separate pieces or a longer run.
Where is the 6mm Foil-Backed Self-Adhesive Insulation cheapest?
At Home Depot, for $16.18, 48% under what the other stores charge, as of our latest check.
Where can I buy the 6mm Foil-Backed Self-Adhesive Insulation?
4 stores we checked sell it, including Amazon, Swift Deals, Home Depot, eBay.

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Buying guides that pick the 6mm Foil-Backed Self-Adhesive Insulation

  • Best self-adhesive foil insulation

Stores we've priced the 6mm Foil-Backed Self-Adhesive Insulation at

  • Home Depot deals and prices