mws Posted August 18, 2006 Share Posted August 18, 2006 So as I am shopping for shingles to re-roof the house, I see rolls of "mid ply" self adhesive roofing material. This stuff comes in a roll about 4 feet wide, 30 or 50 feet long, and looks EXACTLY like generic "Dynamat" material. And cost less $.50 per square foot if you want to compare to name brand... It is sold by roofing supply wholesalers to roofer and is used as a lower cost roofing material. This "mid ply" is laid first, and then another layer of rolled stuff is applied over the top of it. The mid ply is what we want. It cuts easily, and has a super aggressive adhesive on one side. Cut, peel, stick, heat, form, roll just like Dynamat. I added about 10 pounds worth to most of the inside vertical metal surfaces of the Pathy (doors, rear fenders, etc). Well worth the effort as it cuts road noise down about 1/2. And the doors close with a thud instead of a clang. The next time I have carpet out, I will add more to the floor and firewall. I used maybe 1/6 of the roll doing the inner walls, so one roll should do at least 2 cars. Link to comment Share on other sites More sharing options...
Filthy Luker Posted August 18, 2006 Share Posted August 18, 2006 Fantastic idea. I salute you good sir! Link to comment Share on other sites More sharing options...
tmorgan4 Posted August 19, 2006 Share Posted August 19, 2006 I did read about doing that somewhere. It's supposed to work well, with one of the down sides being it smells like tar in the summer. Link to comment Share on other sites More sharing options...
Precise1 Posted August 19, 2006 Share Posted August 19, 2006 Damn good idea mws, how much to do mine... B Link to comment Share on other sites More sharing options...
cdhicks99 Posted August 19, 2006 Share Posted August 19, 2006 Maybe worth a sticky? Link to comment Share on other sites More sharing options...
Precise1 Posted August 19, 2006 Share Posted August 19, 2006 Hmm, would that be under product reviews or how to ?? Doesn't quite fit in either, or both... B Link to comment Share on other sites More sharing options...
dagwoodzz Posted August 19, 2006 Share Posted August 19, 2006 with one of the down sides being it smells like tar in the summer. Sounds like a great idea. on the side of caution I wanna hear someone (preferably a NPORA dude) say they've done it and went the whole summer with no tar smell. MWS are you gonna be the lab rat? Link to comment Share on other sites More sharing options...
Extreme90path Posted August 19, 2006 Share Posted August 19, 2006 I would try it but I am already covered in dynamat... Link to comment Share on other sites More sharing options...
tmorgan4 Posted August 19, 2006 Share Posted August 19, 2006 This site has some good info on the subject if you feel like reading all 10 pages. http://www.sounddeadenershowdown.com/ Link to comment Share on other sites More sharing options...
GrimGreg Posted August 20, 2006 Share Posted August 20, 2006 Actually there was a thread over on AC about similar stuff about 1.5-2 years ago. About the only real difference in the end is the lack of a paper face on it that has a name brand. If a name matters to you. Link to comment Share on other sites More sharing options...
El Pathfindero Posted August 21, 2006 Share Posted August 21, 2006 The guys at my local stereo place actually told me to buy that stuff, they all run it in theri own rigs... Link to comment Share on other sites More sharing options...
mws Posted August 21, 2006 Author Share Posted August 21, 2006 I'm definitely up to my little guinea pig ears... The stuff I bought is "Certainteed Flintlastic SA Self Adhering SBS Modified Bitumen Mid Ply." The roll cover about one square - and weighs 68 lbs. Odor: I detected a couple mild whiffs of a mild tar like odor when I peeled the backer off after letting it lay in the sun to get hot. Have NOT smelled anything inside the car yet, but it has only been in the mid to upper 90's. Nowhere near as bad as a generic Dynamat stuff I bought about 10 years ago. It gave off a mild tar smell for about a year before it became odor free. The key to good application is to get the sheet metal very clean and then get the matting and the sheet metal very, very warm before you apply and then roll it firmly. Peel and stick it cold and just rub with your bare hand will NOT work on vertical services - it will fall off within a few hours. I clean with lacquer thinner, and then roll it with a 1" wooden roller with a handle. I think the roller was made for sealing edges on wallpaper? Get it well adhered with no bubbles and it will stay in place forever. Link to comment Share on other sites More sharing options...
RedPath88 Posted August 21, 2006 Share Posted August 21, 2006 Great find/idea Martin And just too note "Certainteed" is no off brand generic, it is simply not a brand known by most consumers, that's all Link to comment Share on other sites More sharing options...
mws Posted August 21, 2006 Author Share Posted August 21, 2006 Damn good idea mws, how much to do mine... B bring up some uhmwpe and we can make a weekend of it... You be forming skidplates, I be gutting and damping. Might have to tip a barley pop or two while we're at it... Link to comment Share on other sites More sharing options...
dagwoodzz Posted August 21, 2006 Share Posted August 21, 2006 (edited) Odor: I detected a couple mild whiffs of a mild tar like odor when I peeled the backer off after letting it lay in the sun to get hot. Have NOT smelled anything inside the car yet, but it has only been in the mid to upper 90's.Nowhere near as bad as a generic Dynamat stuff I bought about 10 years ago. It gave off a mild tar smell for about a year before it became odor free. Forgive me for being anal about the smell. Did a remod on the bathroom couple of years ago. I put roofing tar paper on the floor then luon (sp?) on top of that for the tile surface. granted floor of the house will probably never see 80deg f. no smell and never even thought twice about it. Edited August 21, 2006 by dagwoodzz Link to comment Share on other sites More sharing options...
GrimGreg Posted August 21, 2006 Share Posted August 21, 2006 I put roofing tar paper on the floor Tar paper (aka roofing felt) is a different animal all together. This stuff was originally sold as a freeze barrier to be run at the edge of the roof under tar paper. Tar paper doesn't adhear to the surface so moisture could backup/ build up under it. This stuff was made to stop that since it made complete contact and bonded with the roof sheathing. It is a rubber based material. Link to comment Share on other sites More sharing options...
Harbinger Posted August 21, 2006 Share Posted August 21, 2006 Sweet! Nice find Martin! Link to comment Share on other sites More sharing options...
mws Posted March 16, 2007 Author Share Posted March 16, 2007 Still ain't smelled a whiff of tar... Link to comment Share on other sites More sharing options...
muttmobile Posted March 17, 2007 Share Posted March 17, 2007 this stuff sounds great mws. i've always wondered is the spray on expanding insulating/foam stuff they sell at home depot would work. Link to comment Share on other sites More sharing options...
govols74n Posted March 18, 2007 Share Posted March 18, 2007 I would try it but I am already covered in dynamat... Rich brat. LMAO Link to comment Share on other sites More sharing options...
govols74n Posted March 18, 2007 Share Posted March 18, 2007 Still ain't smelled a whiff of tar... Still ain't summer. Link to comment Share on other sites More sharing options...
RedPath88 Posted March 18, 2007 Share Posted March 18, 2007 Still ain't summer. Look at the date of his original post Link to comment Share on other sites More sharing options...
govols74n Posted March 18, 2007 Share Posted March 18, 2007 Look at the date of his original post Just checking your research abilities........ Link to comment Share on other sites More sharing options...
GrimGreg Posted March 18, 2007 Share Posted March 18, 2007 i've always wondered is the spray on expanding insulating/foam stuff they sell at home depot would work. Work for? If you planned to use it like a dynomat type thing, no. If you plan to fill open areas with foam, yes. Link to comment Share on other sites More sharing options...
96SE Posted March 19, 2007 Share Posted March 19, 2007 ROFL I love sarcasm^ I'm still chuckling 20 mins later (probably lack of sleep) Link to comment Share on other sites More sharing options...
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