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Armacell
AF/ArmaFlex Self-Adhesive Sheets - Flexible Elastomeric Foam Insulation
Armacell

AF/ArmaFlex Self-Adhesive Sheets - Flexible Elastomeric Foam Insulation

Best price now

$59.12at eBayVerified

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Our take on the AF/ArmaFlex Self-Adhesive Sheets - Flexible Elastomeric Foam Insulation

AF/ArmaFlex is Armacell's flexible elastomeric foam insulation in self-adhesive sheet form, sold here as a 1-inch-thick, 48 by 36 inch sheet with an R-value of about 4.2. The closed-cell NBR foam resists moisture (water vapor diffusion factor above 10,000), handles service temperatures from -297 to 220°F, and carries a B-s3,d0 fire rating. It is aimed at ducts, large pipes and flat mechanical surfaces where wrapping tape-on tube insulation is awkward. The best new price is $734.99 at Zoro as of November 4, 2026, the only new listing found.

Best forInsulating large ducts and flat mechanical surfacesCold-line and chilled-water work where vapor sealing mattersSound control on equipment and ductworkContractors who want peel-and-stick installation
Pros
  • Self-adhesive backing speeds installation on sheets
  • Closed-cell foam with μ above 10,000 blocks moisture vapor
  • Wide service range of -297 to 220°F
  • R-4.2 at 1 inch thickness
  • B-s3,d0 fire reaction rating
Cons
  • Only one new-price listing found, so little price competition
  • Sheet form leaves cutting and fitting to the installer
  • Self-adhesive backing can lose tack on dusty or oily surfaces
  • Bulk sheet pricing is high relative to tube insulation per foot

AF/ArmaFlex Self-Adhesive Sheets - Flexible Elastomeric Foam Insulation prices at every store

  • ZoroNew

    In stock

    $734.99Free shippingObserved at 3:20 PM
    Visit store
  • eBayNew

    Availability unknownSold by voomisupply (99.6% positive, 48,700 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $59.12Free shippingVerified
    Visit store

AF/ArmaFlex Self-Adhesive Sheets - Flexible Elastomeric Foam Insulation price history

Lowest price we've seen: $734.99 on Nov 4 at Zoro. Tracked across 1 store since Nov 4.

Specifications

Material type
Flexible elastomeric foam based on synthetic rubber [NBR]Source
Product colour
BlackSource
Service temperature min
-50Source
Service temperature max
110Source
Thermal conductivity
λd ≤ [W/(m·K)] 0,033Source
Reaction to fire
Sheets: B-s3,d0Source
Water vapour diffusion factor
Sheets [3 mm - 32 mm]: μ > 10,000Source
Structure-borne sound reduction
< 28 dB (A)Source
Sheet length
2000 mmSource
Sheet width
500 mmSource
Sheet thickness
10 mmSource
Coverage
13 m²Source
Form
Sheet
Product Type
Sheet Insulation, Armaflex Sheet
Insulation Type
Acoustic
Insulated Plasterboard
No
Material Composition
Nitrile/PVC
Moisture Resistance
Moisture-resistant
Application
Acoustical Absorption, Sound Control
Suitable Surfaces
Variety of mechanical surfaces, Ducts, Large pipes
Coverage Area
144 Square Feet (Per Carton)
Thickness
1 inch
Length
48 in
Width
36 in

Questions and answers

Is the self-adhesive backing strong enough to hold on ducts?
It bonds well to clean, dry, dust-free metal and most plastics. Wipe surfaces first; on oily or dirty ductwork the adhesive can lift and needs extra contact adhesive.
What R-value does 1-inch AF/ArmaFlex give?
About R-4.2 at 1 inch, from a thermal conductivity of λd ≤ 0.033 W/(m·K). Thicker sheets raise the R-value roughly in proportion.
Can it be used outdoors?
The foam itself resists moisture, but UV exposure degrades bare ArmaFlex. Outdoors it needs a protective coating or jacketing.
How much area does one sheet cover?
Each sheet is 48 by 36 inches, about 12 square feet, at 1 inch thick. The listed 13 m² and 144 square feet figures refer to a full carton, not a single sheet.
Is it suitable for soundproofing?
It absorbs some sound and reduces structure-borne noise, but it is insulation first. For serious acoustic isolation, pair it with mass-loaded vinyl or decoupling.
When is the price lowest?
Only one new listing was found at $734.99 at Zoro as of November 4, 2026, so there is no spread to compare. Watch for carton-quantity discounts from insulation distributors.
Where is the AF/ArmaFlex Self-Adhesive Sheets - Flexible Elastomeric Foam Insulation cheapest?
At eBay, for $59.12, as of our latest check.
Where can I buy the AF/ArmaFlex Self-Adhesive Sheets - Flexible Elastomeric Foam Insulation?
2 stores we checked sell it, including eBay, Zoro.

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