Floor insulation question

[BJ8TONY]

Any recomendation on which products are prefered to insulate the floor in my BJ8 that I am restoring. I am thinking of using a product such as Koolmat.

 

[longbridgehealey]

Dynamat, but don't buy it retail. There are usually quite a few good deals to be found on EBay.

Larry

 

[Keoke]

Hi Tony. Kool Mat is a good product. Pit Stop USA seems to have a good discount price on it. In the archives here on the forum you can find much discussion and pictures of these type products --Keoke.

 

[dphilippo]

Tony,
I think the other key to good heat insulation in these cars is to replace the jute that goes under the carpet with a closed cell insulation with foil on both sides. Typically this would be 3/8-1/2" thick and would go under your carpets. I bought it from a guy on Ebay who markets it as Low E sound/heat insulation, but you may be able to find it at home centers or HVAC supply houses. I installed Dynamat in my car and then later put in the Low-e and it made more of a difference on heat transfer than the Dynamat. The Dynamat seemed to do more for sound than heat in my car. And unlike the jute, if you get water in the car this stuff won't smell like a wet dog.
Later,
Drew
65 BJ8

 

[AUSMHLY]

Hi Tony,

Consider covering more than just the floor. Up the side of the foot wells, front and back. Front where the transmission tunnel meets. Some of us have insulated the inside of the transmission tunnel too. But don't use any materials like Dynamat or Kool Mat there. There are thin heat shield products that look like fiberglass sheets that work better in that area. You'll find a lot of information here in the archives, as Keoke mentioned.

Good luck,
Roger

 

[Keoke]

Tony,
I think the other key to good heat insulation in these cars is to replace the jute that goes under the carpet with a closed cell insulation with foil on both sides. Typically this would be 3/8-1/2" thick and would go under your carpets.

\I bought it from a guy on Ebay who markets it as Low E sound/heat insulation, but you may be able to find it at home centers or HVAC supply houses. I installed Dynamat in my car and then later put in the Low-e and it made more of a difference on heat transfer than the Dynamat.

The Dynamat seemed to do more for sound Deadening than heat Loss in my car. And unlike the jute, if you get water in the car this stuff won't smell like a wet dog. Been tryin to convince folks of that for years. :G----------Keoke-- -----:cowboy:
Later,
Drew
65 BJ8

 

[MotorHead67]

Tony,
I used the Koolmat on the floor, trans tunnel and firewall on my BJ8 and I think it works great. Also, it's thin so I installed the jute and carpet over it without a problem.
Good Luck.
Mike

 

[AUSMHLY]

Tony,
I think the other key to good heat insulation in these cars is to replace the jute that goes under the carpet with a closed cell insulation with foil on both sides. Typically this would be 3/8-1/2" thick and would go under your carpets. I bought it from a guy on Ebay who markets it as Low E sound/heat insulation, but you may be able to find it at home centers or HVAC supply houses. I installed Dynamat in my car and then later put in the Low-e and it made more of a difference on heat transfer than the Dynamat. The Dynamat seemed to do more for sound than heat in my car. And unlike the jute, if you get water in the car this stuff won't smell like a wet dog.
Later,
Drew
65 BJ8

Drew, my Healey brother, I like the way you think.
It just so happens that the photo I attached shows the installing of the Low-E over the top of the Dynamat Extreme. (Tony, if choose to go with Dynamat, I'd suggest using the Dynamat Extreme, vs regular Dynamat. The Extreme is thicker and it has the foil top.)

Cheers,
Roger

 

[John_Progess]

What is the main difference between Koolmat and Dynamat Extreme? I am ready to do this in my car in the next few days. Thanks and have a good day!

John

 

[JodyFKerr]

Koolmat is is a mat made from fibreglass and silicone. It's specifically designed for heat applications and has the side effect of sound deadening.

Dynamat extreme is a butyl based adhesiv layer mated with foil. It's specifically designed for sound deadening and has the side effect of insulation.

Weight: Koolmat (.72 lbs/sqft) Dynamat Extreme (.45lbs/sqft)
Thickness: Koolmat (.105") Dynamat Extreme(.067")
Temp Range (resistance): Koolmat (-40F to 1100F) Dynamat Extreme (-65F to 300F)

Pros for Dynamat: It's already adhesive already... cut to shape, peel craft paper layer and apply. You should use a pressure roller to get good contact and be able to press out the air bubbles.

Cons for Dynamat: Sharp edges on foil, you can cut the crap out of yourself if you're not careful (voice of experience). It's resistant only to mineral oils and water.

Pros for Koolmat: Thermal protection is incredible. Particularly when you apply it fibreglass side toward the heat source.

Cons for Koolmat: You need to use an adhesive to lay it down.

Prices:
$137.00 for 30 sq feet of Dynamat Extreme (from Ebay)
$16.32 per sq foot (rolls are actually 30"wide, so a linear foot costs $40.80) (from southgatebritish.com) - the same site sells an MGA kit for 500+ dollars.


I generally prefer Dynamat for inside the body heat barriers and sound deadening and KoolMat for under bonnet/engine side of firewall uses
Jody

 

[AUSMHLY]

Dynamat also water proofs the area. Others may chime in if Koolmat water proofs.

Drive it like you stole it
Roger