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Discussion Starter #1 (Edited)
I am thinking of trying the roll on bed liner on the inner wheel wells to try and deaden some of the road noise.

Has anyone tried this and what was the outcome?


I am looking at this as one step at a time approach and right now the most noticeable road noise is coming from the front wheel wells first and the rear second.
 

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I went for the cheapest bedliner I could find - Herculiner 1 Quart Black for $30 - and loaded it with hollow fiberglass filler beads for insulation, I mean almost 2:3 volume ratio of filler to paint - and got a quart to almost stretch to cover the undersides of both rear wheel houses. Huge improvement on quieting sand/pebble/gravel impacts AND it blacked out the white background above/behind the rear tires... The second quart got loaded with sand-blasting glass beads to give it more body & resist sandblasting maybe a bit more so recoated everything plus the very limited exposed sheet metal behind the front tires.

Where the most 'live' noise was coming in at the wheel tubs were the outer clamshells, they hissed like a hose nozzle stream sprayed into a metal bucket at 65mph - the sound damper vinyl sheet applied there quenched it nicely. Invest in NOICO or similar for the doors and wheel tubs!


The forums software isn't letting me link my previously uploaded photos except as links.. On the scissor cuts required to fill in the inner wheel tubs spoke pattern it was one-half paper quickee template then flip it reverse to get other half & repeat for opposite wheel tub. EZ peasey, saved $'s and left bare sheetmetal to attach built-ins to.

http://www.promasterforum.com/forum/attachment.php?attachmentid=12041.jpg
http://www.promasterforum.com/forum/attachment.php?attachmentid=12033.jpg
 

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Discussion Starter #3 (Edited)
I went for the cheapest bedliner I could find - Herculiner 1 Quart Black for $30 - and loaded it with hollow fiberglass filler beads for insulation, I mean almost 2:3 volume ratio of filler to paint - and got a quart to almost stretch to cover the undersides of both rear wheel houses. Huge improvement on quieting sand/pebble/gravel impacts AND it blacked out the white background above/behind the rear tires... The second quart got loaded with sand-blasting glass beads to give it more body & resist sandblasting maybe a bit more so recoated everything plus the very limited exposed sheet metal behind the front tires.

Where the most 'live' noise was coming in at the wheel tubs were the outer clamshells, they hissed like a hose nozzle stream sprayed into a metal bucket at 65mph - the sound damper vinyl sheet applied there quenched it nicely. Invest in NOICO or similar for the doors and wheel tubs!

https://www.youtube.com/watch?v=cHaWIHrNZNU

The forums software isn't letting me link my previously uploaded photos except as links.. On the scissor cuts required to fill in the inner wheel tubs spoke pattern it was one-half paper quickee template then flip it reverse to get other half & repeat for opposite wheel tub. EZ peasey, saved $'s and left bare sheetmetal to attach built-ins to.

http://www.promasterforum.com/forum/attachment.php?attachmentid=12041.jpg
http://www.promasterforum.com/forum/attachment.php?attachmentid=12033.jpg
So your saying the bedliner rolled on the underside of the wheel tubs had little or no effect and you had to resort to the NOICO type sound deadening sheets?

Dont remember the brand(Rustoleum) but Walmart had 1gal can of bedliner for around $45.

Still trying to figure out the sound deadening aspect before covering everything up with insulation, Still a bit cold outside in the north metro to be out working on the van.
 

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Still trying to figure out the sound deadening aspect before covering everything up with insulation, Still a bit cold outside in the north metro to be out working on the van.
If you insulate with Thinsulate(TM) then that will be your noise solution also. There is no need for additional noise control products. Thinsulate is an acoustic AND thermal insulator. It also kills panel resonance when adhered to or touching the surface that is vibrating.

Demonstration of resonance reduction: https://youtu.be/cy7088RtB8E

We do like spraying the outside of the metal wheel tubs with Rustoleum bed liner spray. For looks, protection and to reduce noise caused by gravel, water, slush,etc. Lots of coats built up over time works well. Don't shake the spray can to vigorously because the pickup tube tends to fall off. If that happens return the can for another or hold it upside down while spraying. It is great for blacking out paint and chrome.

All the best,
Hein
DIYvan.com
 
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