MGB & GT Forum

Has anyone found a good substitute for DynaMat to insulate floors, interior panels, etc, one that works reasonably well and doesn't cost an arm and a leg?

Thanks,

James Wiley
Decatur, Georgia

Wide strips of roofing and window seal. Lowes home depot etc.
Far cheaper but works nearly as well,takes more work
Roof seal dense mat

---

LNDRVR4X4.COM
Home of Project "INCARN8'


1957 Series 1 Land Rover electric VEHICLE CONVERSION

FIXITUPCHAP.COM
FIXITUPCHAP INCORPORATED

RD3 Radar/ Electronic Warfare Technician
VIETNAM 1969-1972

One way to save money is to not use nearly as much as some people do. A 6"x6" square of sound deadener in the door gets you as much as covering the entire inside of the door.

Rob,

Not sure exactly what products you're referring to. Do you mean EDPM roofing sheeting, or something with a heat-reflective backing?
Has anyone tried the 1/4" thick silver mylar-covered bubble-wrap material used to wrap/insulate pipes?

Dynamat and similar materials deaden sound. They do not insulate against heat and in fact the aluminum coating on dynamat probably results indirectly an an increase in heat flow into the cabin. The foil may however serve to reduce the temperature of small hot spots by conducting the heat over a broader area of the interior.

James,

Your use of the word "insulate" implies you're asking about heat management vs. sound dampening. Do a search as there are several threads on each. Dynamat is for sound dampening, and Chris is spot on about using less. You are wanting just to keep the panel from "ringing" so to speak.

Steve

Roof seal
http://www.homedepot.com/p/Useal-Band-6-in-Aluminum-Foil-Self-Adhesive-Repair-Tape-8872AF6/202086180?N=5yc1vZas8w
and great heat insulation that drop temp by a bunch add in a exhaust heat shield DIY or Moss and drops even more.
http://www.homedepot.com/p/t/100656748?langId=-1&storeId=10051&catalogId=10053&superSkuId=202939043&N=5yc1v&R=100656748

---

LNDRVR4X4.COM
Home of Project "INCARN8'


1957 Series 1 Land Rover electric VEHICLE CONVERSION

FIXITUPCHAP.COM
FIXITUPCHAP INCORPORATED

RD3 Radar/ Electronic Warfare Technician
VIETNAM 1969-1972

MGB all of it rings. Cover it all,including trunk lid and put a piece on the back of the licence plate if running a trunk sub.

---

LNDRVR4X4.COM
Home of Project "INCARN8'


1957 Series 1 Land Rover electric VEHICLE CONVERSION

FIXITUPCHAP.COM
FIXITUPCHAP INCORPORATED

RD3 Radar/ Electronic Warfare Technician
VIETNAM 1969-1972

I Used R-Blox. About 1/4 the price of dyna-mat

Watch this

It is neat and pretty.

bubble wrap with a foil like coating on both sides greatly reduced heat in my
bgt and was cheap. Also covered floors and trunk later with a roll of thick, self stick, dense foam with heavy foil. Used to wrap water heaters.. Deadened sound and did whole car for about fifty dollars, put bubble wrap over it for heat,

X2, doubled up in footwells and on tunnel, with 1" jute padding on top ... between that, the Moss heat shield, tinting the windows, and filling all the unexplainable little threaded firewall holes ( ) my GT experiences very little heat intrusion now

---

~ Marco and Viajero ~

I had a huge problem with heat. The V8 generates allot of hot. The cabin side of the engine bulkhead was almost too hot to touch in the summer. Unbearable sweat box. The following completely fixed the issue so that the bulkhead is no hotter than any other part of the car and it is comfortable.
Local auto sold sold me some. Looks identical to this, but was cheaper. Made in china and this guy is reselling for as much as he thinks the market will stand.
http://www.ebay.ie/itm/Self-Adhesive-Insulation-campervan-caravn-sound-deadening-insulation-VW-T4-T5-/380658149278

Put the reflective side toward the heat. As large sections as possible. In other words stick it to the under side of the transmission tunnel and the engine side of the foot wells. How it works is that the very thin reflective aluminium reflects infra red (heat). Needs to be facing the hots bits in order to do this. It still absorbs some heat, however it has a small mass (thin) so can't absorbe too much before it radiates it out again. Also it's metal so the heat is readly conducted away from point sources over a wider surface area and air flowing past cools it via contact transference. The foam under the foil insulates the car from the hot foil.

Peter has the right idea. I used a different product (Thermaflect) but the same idea; shiny side towards the heat. Thermaflect is a 3 layer product; polished Al foil, fiberglass and an adhesive substrate. I put it on the firewall below the heater box, and into the tranny tunnel as Peter says. Also used a thin layer of insulation on the inside, but the point is to keep the heat out of the passenger compartment in the first place by reflecting the radiant heat from the engine.

Steve

Unfortunately a GOOD thermal insulation cannot be a GOOD sound insulation and vice-versa. Good thermal insulation is very low density for it's volume, and good sound insulation is very high density for its volume. In cars we just have to compromise using a somewhat high density material with heat reflective facings and a pourous filler which does provide decent thermal qualities as well as sound deadening.