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Date:         Wed, 3 Jan 2007 23:28:15 -0800
Reply-To:     Nathaniel Poole <npoole@TELUS.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Nathaniel Poole <npoole@TELUS.NET>
Subject:      Re: Kool Patch
In-Reply-To:  <4bf.813a7b4.32cdfe4c@aol.com>
Content-type: text/plain; charset="US-ASCII"

Professional preservationists almost never apply any kind of impermeable coating to a surface they want to preserve - for this very reason. ANY imperfection or break in the surface allows in moisture where it is then trapped. Painful experience has shown such coatings invariably do more harm than good. Which is why they'll never spray the sphinx with liquid plastic, no matter how much it erodes away :)

Nathaniel

On 1/3/07 10:53 PM, "JordanVw@AOL.COM" <JordanVw@AOL.COM> wrote:

> In a message dated 1/3/07 2:24:57 PM Eastern Standard Time, > mikes@FLATSURFACE.COM writes: > > >> VW used some sort of undercoating material during manufacture, then >> painted over the top. Anyone _know_ what that was > > seam sealer is sprayed on some areas of the underbody, if thats the rubbery > stuff your referring to. > > ask for the kool patch - tar, asphalt, same thing.. > smear it on the underside of your van, and your van will rot out faster. > > i live in the salt belt. they used to have places here that specialized in > undercoating cars.. Ziebart was one.. they all went out of business.. > people discovered cars that were undercoated after they had been on the road > for a > few years rot out faster than those that havent been aftermarket undercoated.. > > you spray on undercoating on a car thats been on the road for 15+ years, you > will never have a virgin surface for the undercoating to stick to... you spray > it over dirt, grease, 15+ years of road grime.. since it doesnt adhere to > that, it creates pockets behind the undercoating that trap dirt, water and > salt.. > > how do i know this? from experience.. i did the same thing.. to a van about > 10 yrs ago.. before i junked it, i poked around on all the rust holes, the > undercoating came off in layers with dirt trapped under it... > > some of the most solid vehicles i've seen are ones that have never been > undercoated..with factory paint still in the wheelwells.. > > > chris


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