
ResoNix Fiber Mat Black Edition - Self Adhering Automotive Sound Absorber & Decoupler Specifications
ResoNix Fiber Mat Black Edition features an automotive-grade adhesive to allow for an easy and lifetime-lasting install. Fiber Mat is an automotive sound absorber that works via the microscopic fibers that convert the passing acoustic energy into mechanical energy (the moving of the fibers) and thermal energy, from the friction of moving through the scattered fibers.
It being so soft and plush also offers it to not just being an automotive sound absorbing mat, but also acts as an excellent decoupler that can be used in doors, rear decks, and anywhere else you can fit it.
It is a better decoupler than any Closed Cell Foam on the market as it is extremely soft and compliant and is highly suggested to be used on any larger panels. Due to the nature of the product, we still offer our CCF Decoupler products to handle the decoupling of small panels and to spot-treat certain areas.
Note: Do not use this inside of a door cavity. Use ResoNix Guardian or ResoNix Lockout for sound absorption purposes that location.
- Hydrophobic and mold/mildew resistant. Water is of no concern for this product.
- Cut with heavy-duty scissors only. Razor blades or box cutters will not cut cleanly. Open edges are fine and won’t fall apart due to the way the fibers are constructed and woven together.
- Use INSIDE of doors on outer door skins at your own risk. We recommend using ResoNix Guardian or ResoNix Lockout instead for this.
- Our automotive sound absorbing mat absorbs sound best when left uncompressed. Having it compressed in certain tight areas is fine, especially for decoupling purposes, but do not try to stuff areas as tight as possible if your goal is acoustic absorption. It wastes product and decreases its overall acoustic absorption performance.
- Engineered fiber structure. Ultra-fine fibers are bonded to a base in a way that allows them to move freely for sound absorption, while staying intact and resisting shedding. Unlike melt-blown materials that fall apart easily, this construction maintains performance and durability.

Sound Deadening Buyer's Guide.
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ResoNix Buyer's Guide
ResoNix Fiber Mat Black Edition - Self Adhering Automotive Sound Absorber & Decoupler vs. Others

NRC 0.95 per ASTM C423, built from PET fiber with unmatched automotive-grade absorption
ASTM C518 rated 0.26 BTU·in/hr·ft²·°F, excellent insulation with no moisture retention
Resists permanent compression from shipping, installs, or handling; maintains full structure
Unlike melt-blown fiber, it springs back after pressure; compressed material = no absorption
Non-hygroscopic PET fiber and moisture-wicking facing won’t soak or hold water
Passed ASTM D3273, ASTM G21, and 7-day humidity test at 98% RH and 38°C
0mm/min burn (FMVSS 302), SE/0 (SAE J369), UL94 HF1 and UL2200 certified
Rated for 150°C continuous use, tested via 42-day heat soak with no breakdown
Will not dry out, crumble, or compress like foam or melt-blown absorbers
Cuts cleanly and won’t shed or fall apart like melt-blown fiber sound absorbers
Pressure-sensitive adhesive is built-in, strong, and rated for harsh environments
Passed 24-hour soak test with no degradation; resists oils, solvents, and more