39in x 78.8in Self-Adhesive Sound Deadening Foam - Fireproof 1in Sheet

In this review the Olithber 39in x 78.8in self-adhesive sound deadening foam earns attention from home studio builders and anyone needing a large, fire-resistant panel for noise control. The biggest reason to buy is its layered construction: a waterproof polymer membrane on top, a high-density semi-open-cell foam core for absorption, and a strong adhesive backing that makes installation straightforward. For rooms, rehearsal spaces, or equipment cabinets where blocking and absorbing sound matter, this sheet combines durability and practical installation features in a single package.

Key Features

• Three-layer construction: The polymer membrane, foam core, and adhesive backing work together to convert surface sound into membrane vibration and then absorb residual energy in the foam.
• High-density semi-open-cell foam: The thicker semi-open-cell center improves mid and high frequency absorption compared with thinner closed-cell options.
• Waterproof surface: The polymer membrane resists oil and dust and wipes clean to look like new after exposure in workshop or studio environments.
• Strong adhesive backing: The peel-and-stick bottom simplifies mounting to walls, doors, and instrument cabinets without extra glue.
• Heat insulation benefit: The closed-hole layer contributes to heat preservation and adds an insulating benefit alongside sound control.
• Fireproof material: The sheet is described as fireproof, making it suitable for equipment rooms where safety matters.

Who It's For

This sheet is best for DIY acoustic treatments in home studios, rehearsal rooms, and for lining instrument or amplifier cabinets where a large single panel can reduce reflections and control noise. Installers who prefer peel-and-stick products will appreciate the strong adhesive that reduces installation time.

It is less appropriate for users needing precision acoustic tuning (diffusion or calibrated absorption coefficients) or for decorative applications where visible finishes are required; the sheet is primarily functional rather than decorative.

Pros & Cons

Pros

• Effective layered design converts and absorbs sound energy for clearer reduction of reflections.
• Durable waterproof polymer surface that wipes clean from oil and dust.
• Peel-and-stick adhesive backing speeds installation and adheres firmly to many surfaces.
• Thicker semi-open-cell foam improves overall sound absorption versus thin closed-cell sheets.

Cons

• The panel is functional and plain in appearance, so it may not suit visible decorative treatments.
• No detailed acoustic performance numbers are provided, so exact absorption at specific frequencies is not available.

Specifications

Product size	39in x 78.8in
Thickness	1in
Top layer	Polymer sound deadening membrane (waterproof)
Core	High-density semi-open-cell sound-absorbing foam
Bottom layer	Strong adhesive backing (peel-and-stick)
Primary benefits	Sound absorption, heat insulation, wipe-clean surface
Fire resistance	Fireproof material (as described)

Our Verdict

The Olithber 39in x 78.8in self-adhesive foam sheet is a practical, value-focused choice for hobbyists and small studios that need a large, easy-to-install acoustic panel with waterproof surface and thermal insulation benefits. It is cost effective for treating reflective surfaces or lining cabinets, though professionals seeking measured acoustic coefficients may require additional data or specialized products.

Frequently Asked Questions

Is the surface easy to clean?
The polymer membrane is waterproof and wipes clean from oil and dust, restoring its appearance after cleaning.

Can I stick this to drywall or wood?
Yes, the sheet uses a strong adhesive backing intended for peel-and-stick installation on common surfaces like drywall and wood.

Will this also insulate against heat?
Yes, the closed-hole aspect provides heat insulation and helps with heat preservation alongside acoustic absorption.