Insulation options that are waterproof?

[3lud13]

SO recently I have purchased a perentie and was looking at giving the cab a little insulation trying to slow some of the heat coming through the firewall and up from the exhaust and maybe if I am lucky limit some of the noise too.
I have seen threads and posts of people using many different products for insulation though most of them don't seem to be waterproof as they are generally some form of foam that turns to mush when wet.
Wondering if anyone has come across something suitable that doesn't require removal if your wanting to quickly hose out your vehicle or leave the roof of when it starts to rain.
I have some rubber chequer plate that I will be looking at laying down in the cab and through the tray but thought I should look into insulation options first.

[4runnernomore]

Try this. Underlay - Water Proof (http://www.all-car-carpets.com.au/page/shop/flypage_org/product_id/200)

I purchased some for a custom dual. Cab 80 series I had. Worked well.

Cheers Chris

[AndyG]

Heat wrap on the exhaust will make a big difference, to heat transfer
Maybe then peruse the options at Clark Rubber.
If you want to spend $$$ options are
Dynamat range of products
NK Group

[mrb505]

Swing Slide Climb Green Rubber Play Paver I/N 3321049 | Bunnings Warehouse (http://www.bunnings.com.au/swing-slide-climb-green-rubber-play-paver-_p3321049)
I've used this in my 130 big cab on all the flat surfaces under seats and floor quietened it down a lot don't know about heat I'll have to wait till summer but I'd say it would help.
They were selling it as anti vibration mat and it was black and 500x500mm squares when I bought it but it's the same stuff recycled rubber chunks bonded together in a 1/2 inch mat it doesn't get affected by water

[Wicks89]

Dynamatt does not get affected by water and works quite well. Though I would suggest install it so that the metal foil side faces the heat source.

I installed mine on the firewall on the inside, and it works pretty well for heat and noise retardation, but would be better on engine side.

I put it on the floor panels, UNDERNEATH and it works pretty well there too.

I did have foil faced foam insulation on the bonnet and that worked REALLY well for sound insulation. Theres a lot of noise that comes through the bonnet.

[simonmelb]

Some other brands mentioned here: http://www.aulro.com/afvb/projects-tutorials/115591-bundalenes-puma-project-19.html#post1372301

[3lud13]

Thanks heaps for the replies was thinking of using dynamat myself but wasn't sure if it was waterproof or not but will look into some of the other options including wrapping exhaust cause that cuts down heaps of heat on my motorbike sure in the car it would do the same.

[manic]

Heat wrap the exhaust and look into lead lined engine/gearbox blankets. One around the bellhousing and one on top and down the back of the engine.

Best to start at the source. Dynamat will dampen vibrations on your panels. Closed cell foam is water resistant and will reduce reflection of airborne noise in cab and help insulate the roof. Heavy rubber mats good for the floor.

[Robmacca]

Thanks heaps for the replies was thinking of using dynamat myself but wasn't sure if it was waterproof or not but will look into some of the other options including wrapping exhaust cause that cuts down heaps of heat on my motorbike sure in the car it would do the same.
Would wrapping the exhaust cause the exhaust to rust quicker?

[Beery]

Would wrapping the exhaust cause the exhaust to rust quicker?

Shouldn't do. The heat of the exhaust would evaporate any moisture very quickly.
Stainless pipe too, on puma's at least.

[gusthedog]

Just remember that if you use cheaper rubber or insulation not designed for use in a car it can give off toxic fumes when heated. The bunnings pavers are probably a case in point. Use at your own risk.

[lebanon]

I have treated mine with closed cell foam, the footwells, gearbox tunnel, seat bases and cargo area are now covered.
The result is amazing, I can drive while wearing shorts. The noise has also been dramaticaly reduced.

Will have to wait for winter to see if the foam will absorb water.

[mrb505]

Just remember that if you use cheaper rubber or insulation not designed for use in a car it can give off toxic fumes when heated. The bunnings pavers are probably a case in point. Use at your own risk.

Don't know if you've had a look at the stuff but it's made from recycled tyres in Australia I think you'd find a lot more toxic materials in any new vehicle to start with.
No I wouldn't wrap it around a exhaust pipe but on the floor and under the seats it works really well stops a lot of vibration noise as it's fairly heavy 9kg sq metre

[Lotz-A-Landies]

The best way to reduce heat transfer from an exhaust is to have it ceramic coated inside and outside. It's quite amazing how effective it is, but a bit of a waste on standard pipework. Doesn't do so much for noise transfer, but maybe a little as it smooths the internal surface so there's not so much echoing.

Usually done on extractors.

Not perentie and not something you'd expect on a Series III military:

https://www.aulro.com/afvb/images/imported/2015/09/709.jpg

[rick130]

Would wrapping the exhaust cause the exhaust to rust quicker?


It won't on aluminised tube, but will with black steel.

[gusthedog]

Don't know if you've had a look at the stuff but it's made from recycled tyres in Australia I think you'd find a lot more toxic materials in any new vehicle to start with.
No I wouldn't wrap it around a exhaust pipe but on the floor and under the seats it works really well stops a lot of vibration noise as it's fairly heavy 9kg sq metre

Yeah you might be right. I was talking with a rubber manufacturer in Wodonga and he told me the heat from the transmission tunnel is enough to release toxic fumes from some types of rubber. I've made sure I use proper stuff ever since.