TheSamba.com :: View topic - Shhhhh! I can't hear a sound!

Sun Aug 23, 2009 12:52 am

Batan wrote: I will be doing my bus as well, minus the roof. I'm wondering how does this compare to B-Quiet(similar to Dynamat) I used on my Ghia:

B-Quiet is really easy to work with and the cost is $85 for 50 sq.ft. vs. $100(on sale) for 30sq.ft..

Hi! I looked into B-Quiet and was initially lured by their low pricing. Upon further inspection, their Extreme product line (the one you quoted at $85 for 50 sqft) definitely contains asphalt. See here: http://www.b-quiet.com/extreme.html

Sun Aug 23, 2009 2:06 am

I used fatmat in my project and haven't really looked into any issues about it being asphalt or not. It was @110 shipped for 100 square foot so it beat all competitors for price. It's been in over a year with no smells at all. I'm pretty sure that if you look into it enough, all sound deadeners contain and oil based substrate that puts them in the asphalt family. Some will just off gas more than others. It's all part of the game when you're slapping tarred aluminum foil all over your bus.

Sun Aug 23, 2009 7:15 am

BUSBOSS wrote: GusC2it wrote: The rolled roofing is made from rubberized "Butyl" in a polypropylene mesh. Butyl is made from the higher "cracking" of crude oil. It is a synthetic rubber, like Neoprene only softer. The roofing is classed as non-hazardous. It comes with soft Aluminum coating or not. Im just trying to save you guys some money. It's the same stuff. Go sniff some at Lowes. Here's one manufacturer.
http://www.roofer911.com/roofs-peel-seal.htm

Gus-
I clicked on the link you provided and here is what the product information said: "The sheet features multiple laminations of specialized aluminum foil, high density polymer films and a thick layer of rubberized asphalt waterproofing compound. . . Rubberized asphalt will not crack or dry, which is one advantage to Peel & Seal."

I could be wrong but I think that means it contains asphalt.

Rubberized asphalt may contain butyl (that's what makes it rubberized) but it also contains asphalt. A quick and easy way to test is to soak a small sample in a glass containing acetone. If the liquid turns black then you've got asphalt in there. I have yet to see a "Peal & Seal" product without asphalt at my local hardware outlets.

FYI
You also want to be cognizant of the thickness of the product so that it maximizes the sound dampening properties. Many roofing products, in addition to containing asphalt, are thinner.

Why should you choose butyl rubber over asphalt?
Butyl rubber is more reliable than asphalt.
Butyl is pliable at low temperatures and can be applied to a variety of building materials at temperatures 30°F to 180°F. Asphalt becomes brittle below 40°F, reducing the ability to stick to surfaces.
Butyl has high cohesive strength and structural integrity that support the adhesive at elevated temperatures as high as 200°F. Asphalt has a narrow temperature range and often will ooze at elevated temperatures.
Butyl rubber adhesive contains no asphalts, VOCs (volatile organic compounds) or solvents. Asphalts can react with the solvents in caulk and sealant compounds, causing degradation of both products, which compromises the seal integrity reducing water resistance.

My bottom line: Whatever product you decide to use, please just make sure you avoid asphalt ingredients. I have gained a lot of knowledge from others on Samba and I was just sharing my positive experience with one of many available products in hopes that someone might find it useful.

Hi again Busboss! I will take your info into consideration. There are probably different qualities and composisions according to the manufacturer. "Let the buyer beware"....Are you saying that some products are 100% butyl?

BTW, I like your avitar. Did you design it?

Sun Aug 23, 2009 9:25 am

GusC2it wrote:

Hi again Busboss! I will take your info into consideration. There are probably different qualities and composisions according to the manufacturer. "Let the buyer beware"....Are you saying that some products are 100% butyl?

Yes. Many products including BXTII are asphalt free. They are more costly because of that.

BTW, I like your avitar. Did you design it?

Thanks! No - I wish I was that good.

Sun Aug 23, 2009 12:28 pm

BUSBOSS wrote: Batan wrote: I will be doing my bus as well, minus the roof. I'm wondering how does this compare to B-Quiet(similar to Dynamat) I used on my Ghia:

B-Quiet is really easy to work with and the cost is $85 for 50 sq.ft. vs. $100(on sale) for 30sq.ft..

Hi! I looked into B-Quiet and was initially lured by their low pricing. Upon further inspection, their Extreme product line (the one you quoted at $85 for 50 sqft) definitely contains asphalt. See here: http://www.b-quiet.com/extreme.html

So, are they lying when they give us the temperature range?
Temperature Range:
-55C to +110C (-67F to +230F)

The car I posted earlier spent it's time in temperatures between -55F(not a typo) in the winter and 100+ in the summer, and I never experienced any peeling falling off in low temps or smells in high temps. I've had panels off after couple of years and everything is a ok in there. I haven't looked into everything as deep as this whole contains, does not contain asphalt issue. All I'm saying is that it worked very well on my car in very extreme temperature. :? The whole self-adhesive rubbery backing made this part of the project a lot of fun as well. :D I do see your point though.

Sun Aug 23, 2009 2:52 pm

The detectable smell of asphalt will usually disipate within a few days but that does not mean it stops off gasing especially when heated.

Sun Aug 23, 2009 7:35 pm

Thank you Busboss for taking the time to share your experience with us!

Mon Aug 24, 2009 9:01 pm

I'm curious to know what you are using over the material on the floor to prevent it from getting torn up? It seems like factory rubber mats or carpet would cause wear through the foil.

Tue Aug 25, 2009 8:21 am

Hardwood laminate flooring will be in the walkthrough and cargo area. The rear hatch area will have carpet and then be covered by the rear Westy cushion. I did not install it on the floor of the front cabin area.

Mon Nov 02, 2009 1:17 am

Did you have a conversation with Raam about the difference between BXT and BXTII?
Would BXT work for those of us on a budget? Or would we be better off buying the more expensive stuff?

Mon Nov 02, 2009 10:20 am

kanniff wrote: Did you have a conversation with Raam about the difference between BXT and BXTII?
Would BXT work for those of us on a budget? Or would we be better off buying the more expensive stuff?

Give them a call. They'll be happy to talk with you.

IMO, if your budget is tight, BXT will do. On the other hand, you'll definitely get more bang for your buck with the improved version II. They also sometimes sell tested product at a discount when it doesn't meet all their requirements - check the website.

Good luck and feel free to ask any install questions! You won't believe the difference when you are done.

Mon Nov 02, 2009 12:35 pm

This is a nicer altenative to the lowes bubble pack insulation.

http://lobucrod.com/

I'm doing the interior of my TIII with it after lot of reading on the H.A.M.B.
Easy to work with and not expensive or heavy.
Very good customer feedback.