The Forums Home | Tech Tips | Gallery | FAQ | Events | Features | Search
Major event in Virginia
Look Look Look
ODSS Bolters
head to


September 21-23
Rolling in Winchester VA Read the details.

Searching the Site

Get info about how to search the entire Stovebolt site here. To do a search for just the forums, get those details in the IT Shortbus fourm.
Who's Online Now
19 members (32vsnake, Bill Marlow, 52Carl, 55shaker, coopertechparts, 122099NOLL, 2 invisible), 135 guests, and 3 robots.
Key: Admin, Global Mod, Mod
The Zone
Forum Statistics
Most Online1,229
Jan 21st, 2020
Step-by-step instructions for pictures in the forums
Previous Thread
Next Thread
Print Thread
Page 1 of 2 1 2
#1494908 Sun Apr 02 2023 11:11 AM
Joined: Nov 2021
Posts: 888
Has anyone tried the expansion foam that supposedly does not push to sound deaden the A B pillars, cavity between tank and Window? I'd like to try it, but am scared.

Even thinking about the cavity between the inner and outer roof?

Last edited by Ferris Bueller; Sun Apr 02 2023 11:35 AM.

1966 C-10 Step Side
A Project Journal
Ferris Bueller #1494914 Sun Apr 02 2023 12:11 PM
Joined: Sep 2010
Posts: 1,628
There are two types if you use the type used for insulating windows it does not have as much force.

1954 GMC 9300
In the Gallery Forum
Ferris Bueller #1494936 Sun Apr 02 2023 03:23 PM
Joined: Aug 2018
Posts: 904
Something to consider
Expanding foam products for construction come in many variations and some are open cell while other are closed cell

Both open and closed can get water logged, but closed cell takes much longer to soak in water
All foams once water logged cannot be dried out and must be cut out, my dad had a old panel van that was foam insulated and the foam didn’t stop condensation from penetrating the foam to the back side of the metal body and this lead to massive rusting out of the whole vehicle in a decade.

Since this foam would be acting like it’s own vapor barrier I would only consider a closed cell type for in a car

All the single can foam products are open cell
You need a kit that mixes two products in the nozzle to get closed cell foams
They are highly exothermic but spraying in metal you should be fine.

Ferris Bueller #1494938 Sun Apr 02 2023 03:34 PM
Joined: Sep 2020
Posts: 223
Consider that foam may trap moisture, either from water intrusion or condensing.
If you use sound deadening pads you will get significant improvement, removing the tank to install if necessary, in the pillars will offer less result as those areas are small and tight which resonate less. Larger the span the more it resonates.
Summit has their own brand peel and stick rubber/alum pad kit that priced out well. Still have extra laying around.

When I did inside the door panels, floors, firewall, and cab rear lower half I got significant results, if I had done behind/above the headliner I would expect added reduction (is added reduction and oxymoron? How about further reduction)
The doors sound more solid than I expected when they close instead of tinny, even though I did not do the outer skin (so they could breathe).


Hank: 46 Chev 1/2ton shortbed
2023 Miata RF Club
Ferris Bueller #1494973 Sun Apr 02 2023 08:33 PM
Joined: Nov 2021
Posts: 888
I don't think completely filling void is necessary. Just getting a few areas will stop the resonance I think. I am very happy with how thuddy the floor and rear is up to the top of where the tank goes. As soon as you start tapping high in the B pillar you can hear it vibrating. Same with the roof.

If a guy didn't fill it completely air could still circulate and dry if any moisture got in there.

1966 C-10 Step Side
A Project Journal
Ferris Bueller #1494986 Sun Apr 02 2023 10:04 PM
Joined: May 2015
Posts: 8,037
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
If you're just trying to take the "ring" (like a bell) out of a panel, just about anything that can be stuck to the center of it will work. I've seen where they just took a glob of roofing tar (or something similar) and smeared it on the underside of the panel. Roofing tar probably wouldn't be the best choice.

Newest Project - 51 Chevy 3100 work truck. Photos []
#2 - '29 Ford pickup restored from the ground up.
First car '29 Ford Special Coupe
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
klhansen #1494998 Sun Apr 02 2023 11:15 PM
Joined: Jul 2018
Posts: 45
I had mine sprayed with fluid film, inside doors, rockers, roof, window killers, everywhere he could get. Truck sounds much more solid, all tinny sounds gone, more quiet going down the road and I don't have to worry about rust starting on the inside of all my new panels.

Ferris Bueller #1495004 Sun Apr 02 2023 11:51 PM
Joined: Jan 2019
Posts: 1,335
Herder of Cats, Goats, and Sheep (moderator)
What is fluid film in this context?

From the Rocky Mountains?
Check in with the RM Bolters!

HiPo Forum Moderator

1958 Apache, long bed Fleetside, V8 w/SM420
Driveable but the rear axle needs work.

1959 Apache, long bed Fleetside that has been in the family for 25 years but in desperate need of love.
Fibonachu #1495143 Mon Apr 03 2023 11:47 PM
Joined: Jul 2018
Posts: 45
Took care of the ring, tinny sound, truck is much quieter. NO moisture issues. We use spray foam a lot in my trade, it is highly over rated.

Ferris Bueller #1495498 Thu Apr 06 2023 12:30 PM
Joined: Apr 2005
Posts: 3,173
They make a product just for this app called Lizard Skin.

SNOYL #1495506 Thu Apr 06 2023 12:55 PM
Joined: Jan 2014
Posts: 3,134
Originally Posted by SNOYL
Took care of the ring, tinny sound, truck is much quieter. NO moisture issues. We use spray foam a lot in my trade, it is highly over rated.

Never would have guessed that fluid film would deaden sound. Would be super easy to get it in places impossible to access with other products.

Ferris Bueller #1495540 Thu Apr 06 2023 04:01 PM
Joined: Nov 2021
Posts: 888
Took care of the ring, tinny sound, truck is much quieter. NO moisture issues. We use spray foam a lot in my trade, it is highly over rated.[/quote]

That being said I can easily build a flex hose (spray 360) for some undercoating to be sprayed into these areas. Once bonded it would not absorb moisture?

1966 C-10 Step Side
A Project Journal
Ferris Bueller #1495615 Fri Apr 07 2023 12:06 AM
Joined: Jul 2018
Posts: 45
Yes, you can buy everything needed to spray it, a small hole in the doors and a plug . In the roof area we went in thru the rearview mirror hole and sunrises holes, about a three foot hose with 360 spray. I was impressed. I don't think there is anywhere you can't get it. It is impressive stuff.

Ferris Bueller #1495637 Fri Apr 07 2023 02:45 AM
Joined: May 2005
Posts: 296
I used ABESCO fire stop expanding foam to seal the openings between the engine compartment and the rear quarter panels on my VW beetle. That was 15 years ago and there is no evidence of rust and it is an effective seal. This foam has very little water absorption and is typically used to seal around ducts and electrical conduits in fire rated walls and floors. I'm not sure I would use it to completely fill a cavity but it expands to fill a large opening similar to Great Stuff. It is not the same as Great Stuff. The two part foam would be better if you need to fill a sizable cavity but I don't know about it's flammability.


59 fleet #1495754 Sat Apr 08 2023 12:18 AM
Joined: Jul 2018
Posts: 45
Here in northeast Pennsylvania water absorption equals rust, why I used fluid film. Unexpected benefit was sound reading in those areas, roof, doors, box sides even hood area. My guy is a professional and I am very happy with the results. It even surprised him, I think I'm the only one that would a vehicle 50 plus years old and fluid film it.

Page 1 of 2 1 2

Moderated by  Hambone 

Link Copied to Clipboard
Home | FAQ | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Powered by UBB.threads™ PHP Forum Software 7.7.5