Where the Tar Was

PT
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1964 Aloha & 1962 Holiday House

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Where the Tar Was Jun 12, 2020 7:27:42 GMT -8

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Post by PT on Jun 12, 2020 7:27:42 GMT -8

Hey all -

I'm looking for ideas on how to treat the overlap areas on my new skins that the factory originally sealed with what looks like tar. This was in addition to the Jrail/putty combo that they also used.

I've heard the horror stories about Butyl - but I've also read that it provides a better seal than regular putty? I was thinking I might use 1/16 butyl tape in place of the old tar at the skin overlaps and regular 3/16 putty with the Jrail.

Thoughts?

Indecision may or may not be my problem - Jimmy Buffett

WhitneyK Active Member Posts: 492 Likes: 169 '67 Shasta Compact Currently Offline	Where the Tar Was Jun 12, 2020 9:40:24 GMT -8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by WhitneyK on Jun 12, 2020 9:40:24 GMT -8 My BeeLine Wasp roof overlap / seam was done from the factory this way as well. They used aluminum skin front and rear and used galvanized tin on the center section of the roof.
	Experience teaches you to recognize a mistake when you've made it again. '12 Weakender TD (homebilt)(44 States +BC & around 45k miles) '67 Shasta Compact '67 Bee Line Wasp

vikx
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Where the Tar Was Jun 12, 2020 10:39:00 GMT -8

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Post by vikx on Jun 12, 2020 10:39:00 GMT -8

I don't think today's tar is as good yesterday's tar. If it worked for 50 years...

That said, some sort of sticky boat goop may help seal the overlap. It looks like it was about 3"? I'd put the goop at the inside seam and place 1/8 butyl at the outside. It will ooze, so maybe set the putty back 1/8 inch or so.

You can also do a trial with different thicknesses of butyl to see which you like best. 1/16 may work better for flat seams. My Hanson had a small bend where the metal overlapped, so the butyl oozed into a slightly larger gap right at the joint.

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Post by PT on Jun 12, 2020 7:27:42 GMT -8

Post by WhitneyK on Jun 12, 2020 9:40:24 GMT -8

Post by vikx on Jun 12, 2020 10:39:00 GMT -8