Both Numbers, Always
Every heat rating names its zone: ceramic face temp and adhesive backing temp. You know which side to face at the source before the utility knife comes out.
← Back to Home
About FOURUB
Three Insulation Jobs, One Brand That Names Its Limits
You've read enough spec sheets to distrust a single big number with no zone attached to it. FOURUB splits every heat rating by the zone it covers, and you see both sides of each limit before you buy. Sound deadening runs on PE-foam-and-foil mats that drop cabin noise 6-10 dB and reflect 95.9% of underbody heat. Ceramic-fiber mats take direct-source heat, holding 2300°F on the fiber face while the adhesive backing sits on cool metal rated to 230°F. Wire protection comes from fiberglass and aluminum sleeves and 2:1 braided sleeving rated to 150,000 abrasion cycles. Each product names the surface it belongs on and the limit it stops at, so you install to the right number instead of guessing.
Take the daily driver whose turbo-adjacent fuel line vapor-locked on a July idle. He wrapped the line in a 1.5-inch aluminum foil sleeve rated 485°F continuous, and three summer seasons later he has logged no vapor-lock event. The cheaper foam wrap he tried first saturated with heat and then conducted it straight into the fuel. This sleeve reflects the radiant load before it reaches the line.
You get all of it backed by a 1-year warranty, two years on the braided sleeving.
Why It's Built This Way
Three Jobs, One Brand
Cabin noise, direct-source exhaust heat, and wire abrasion are separate problems. Each gets its own product instead of one composite mat that underperforms all three.
Honest Limits Over Superlatives
The 230°F adhesive ceiling sits in the product description, not buried in fine print. Knowing a material's limit stops the bad install before it happens.
Warranty Where You Can't Look
Braided sleeving carries a 2-year warranty because wire protection hides inside panels. If the weave fails, the coverage handles the replacement without a teardown bill.
Who Reaches for These
The Builder Who Torch-Tested a Heat Shield and Watched It Peel
You ran a torch at a competitor's ceramic mat adhesive and saw it release at a temperature the page never printed. You want both limits disclosed first. The dual-limit ceramic mat faces 2300°F on the fiber side and keeps the adhesive on cool metal at 230°F.
The Commuter Chasing the Last 10 dB of Cabin Quiet
You finished the doors and trunk, but the floor and firewall still transmit road hum. You need a measured 6-10 dB spec, not a generic 'sound deadening' label. One foam mat sheets the full floor pan; a second covers the firewall.
The Engine Builder Whose Turbo Fuel Line Vapor-Locked Last Summer
Your fuel line sits beside a turbo and starved into vapor lock on a July idle. You need a sleeve rated past 400°F continuous, with the sustained number stated, not just peak. The aluminum foil sleeve holds 485°F continuous over the line.
The Audio Installer Routing Amp Wire Through a Firewall Grommet
Your 4-AWG cable has to survive 100,000 miles of chassis rub at the grommet edge without fraying to bare copper. You need an abrasion cycle count, not a 'heavy duty' label. Heat-shrink braided sleeving locks 2:1 over the cable at a 150,000-cycle rating.
4.5★202 verified buyer reviews
2300°Fceramic face rating
150,000sleeving abrasion cycles