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Date:         Mon, 2 Jan 2017 10:04:13 -0800
Reply-To:     Edward V Barger <edvbarger@MAC.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Edward V Barger <edvbarger@MAC.COM>
Subject:      Re: instilling pop top hinges
Comments: To: Alistair Bell <albell@SHAW.CA>
In-Reply-To:  <995AF2D9-877E-41C2-B3F4-75E07BB35350@shaw.ca>
Content-type: text/plain; charset=utf-8

Is this butyl caulking tape the same as mastic ?

http://www.westmarine.com/buy/incom--butyl-caulking-tape--P015730286?recordNum=18

There is a West marine near by long way to a RV place from Venice beach

ed

Edward V Barger edvbarger@mac.com 310 922 6251

> On Dec 30, 2016, at 8:47 PM, Alistair Bell <albell@SHAW.CA> wrote: > > Sure there are great sealers, silicone, polyu , what ever. But I still prefer the mastic ( and VW specifies mastic for this application) for its ease of use and for the fact that you can repositions the fasteners without breaking the mastic seal. > > I mean, I could have used 3m 5200 sealant adhesive on all the fastener penetrations on both the Fiberglas and the steel roof. But I would have a fight getting the fasteners back out later. > > When you install the hinges in the roof of the van you have to align the roof. That means some movement of the hinges and the bolts, and a good bit of trial and error to get things right. > > The mastic doesn't set up like other sealants and allows this adjustment. > > Oh and btw, the westy roof is not a simple chopped mat lay up. I believe it's injection moulded Fiberglas. > > Alistair > > > >> On Dec 30, 2016, at 7:30 PM, Don Hanson <dhanson928@gmail.com> wrote: >> >> Well, if it's made for RVs, it's probably adequate.. >> Fiberglass, especially chopper matt layups like Westie tops will degrade with water absorption over time. Good silicone filling all holes, all the way thru, that is smart for boats If you anticipate removing the fasteners at a future time, otherwise we use a permanent polysulfide marine adhesive for everything that penetrates... >> Our Vanagons are RVs.. 😋 >> >> On Dec 30, 2016 5:57 PM, "Alistair Bell" <albell@shaw.ca> wrote: >> I honestly don't think , our I should say I haven't found, that silicone caulk works as well or is as easy to use as dum dum for this use. Apart from being less work to apply, the mastic is tolerant of repositioning of the fasteners at any time. >> >> Alistair >> >>> On Dec 30, 2016, at 5:48 PM, Don Hanson <dhanson928@GMAIL.COM> wrote: >>> >>> ---------- Forwarded message ---------- >>> From: "Don Hanson" <dhanson928@gmail.com> >>> Date: Dec 30, 2016 5:47 PM >>> Subject: Re: instilling pop top hinges >>> To: "Alistair Bell" <albell@shaw.ca> >>> Cc: "vanagon@GERRY.VANAGON.COM" <vanagon@gerry.vanagon.com> >>> >>> silicone the whole bolt, just spread some silicone out about 1/8" deep, on >>> a scrap, then roll the length of the thresds through the silicone. Push >>> the bolt through the hole and cinch it up... Standard fiberglass >>> boatbuilding proceedure. Let the extra dry around the hole and bolt heads >>> and the nut, then peel it off the gelcoat or paint...or clean up with a wet >>> cloth as you install, but that's normally a pain and necessary only on a >>> porous surface. >>> >>>> On Dec 30, 2016 5:28 PM, "Alistair Bell" <albell@shaw.ca> wrote: >>>> >>>> I prefer mastic sealer. Sometimes called dum-dum. You get a roll of it for >>>> about 10 bucks at a rv supply store. >>>> >>>> It's easier to use than silicone, and I think seals better over time. >>>> >>>> Alistair >>>> >>>>> On Dec 30, 2016, at 4:03 PM, Edward V Barger <edvbarger@MAC.COM> wrote: >>>>> >>>>> Putting the 87 back together >>>>> >>>>> Thinking I should put silicone sealer on the inside of the heads of the >>>> carnage bolts that secure the hinges to the pop top to prevent water >>>> seeping in >>>>> Is this standard practice is there a better way ? >>>>> >>>>> ed >>>>> >>>>> >>>>> Edward V Barger >>>>> edvbarger@mac.com >>>>> 310 922 6251 >>>> >> >>


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