17prospective buyer

http://shop.hushmat.com/p/hushmat-ultra-door-kit-silver

I bought 10 square feet of this stuff from Performance Unlimited in London, ON at the advice of one of the guys there. He said Dynamat and Hushmat are identical in quality except Dynamat is more expensive because you are paying for a name. So, he sold me Hushmat. This stuff comes in 1x1' tiles, the 10 square feet box i got is very heavy for it's size so it seems to be pretty substantial insulation.

It looks exactly like the OEM silver foil insulation used on my 87 S4 firewall.

Just thought i'd share for anyone working on a project or something like that.

danglerb

Says its good to 400F, I think I would want to see how it does where I could see it before putting it in a hot place where I couldn't see it.

Imo000

If its anything like the tar used in Dyanamat, it will melt like the "acid guy" in Robo Cop.

BC

On the INSIDE of the firewall, you should be okay. On the OUTSIDE you need metalic over a woven temp barrier.

17prospective buyer

Ok.. so if Dynamat will melt, and this stuff isn't good enough for the outside of the firewall, do you guys have any actual suggestions for something else?? I bought this stuff for the engine side of the firewall.

77tony

Reflect-A-Cool by Design Engineering, Inc. IIRC Amazon has it for less $$. T

LarryM

I used DEI's Reflect a cool on the firewall and floor boards of my LS1 CJ5 conversion. I wanted some insulation from the headers and side pipes. The golden eagle hood deal needed heat protection too. The original one had some heat damage.
The material is durable also. It holds up to pressure washing and I doesn't have and stains yet. 10 years so far.

LM

Fabio421

Reflect-A-Cool Reflect-A-Cool, constructed of fiberglass material backed with a layer of aluminized reflective foil to handle direct continuous temperature of 400°F has many uses such as covering firewalls, marine engine compartments, RVs, in the tub of a racecar where typical mechanical fasteners cannot be used and has many industrial uses.

Reflect-A-Cool can be trimmed to fit just about any shape. Just measure, trim, face reflective side towards source of radiant heat and remove self-adhesive backing. It’s that easy.
Protect wires, cables, hoses, pipes & tubing from radiant heat sources
Radiant heat protection up to 2000°F
Self-adhesive backing with release liner for easy installation
Moisture & solvent resistant
Virtually NO clearance needed

17prospective buyer

Imre, i think this stuff i bought is butyl based, not asphalt/tar based. I have read about the original Dynamat melting because it is still tar based, Dynamat Extreme is butyl AFAIK.

Imo000

How about this, wrap a small piece of it in foil (so if it melts doesn't drip everywhere) and place in in the engine compartment of your daily driver. If it melts after a long drive, you have your answer.