tpcm5000
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Yellowstone 1966
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Post by tpcm5000 on Jun 11, 2020 11:22:08 GMT -8
As I remove the skins on my Yellowstone I see I have two layers of butyl at the seams. It looks like they put butyl in between the overlap seam, and then of course between the jrail and the camper. The jrail butyl is completely dried out but the butyl in the seam is more tar-like. I assume it is still butyly and simply did not dry out but is there some other product they used back then on the seam to seal it? Should I do the same, for example add butly between the seam and staple, then add butly on the jrail before attaching? Larry may have answered this in one of his videos but I cannot find it now. Is butyl on the jrail only sufficient?  doublebutly by Tom Myers, on Flickr |
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Post by danrhodes on Jun 11, 2020 16:29:34 GMT -8
Some folks do that and if your camper was made for it, do what they did. I tried and my overhang was too small and I made a big mess, so shot a little butyl caulking in there for good measure (don't do that).
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nccamper
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1962 Forester- 1959 Shasta
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Post by nccamper on Jun 11, 2020 19:01:30 GMT -8
I've tried the double approach too without good results. Too thick. I dab a little (very little) gutter seal on staples and at key overlap areas before putting on the putty and jrail.
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Post by ramblingamblinman on Jun 12, 2020 18:18:15 GMT -8
As I remove the skins on my Yellowstone I see I have two layers of butyl at the seams. It looks like they put butyl in between the overlap seam, and then of course between the jrail and the camper. The jrail butyl is completely dried out but the butyl in the seam is more tar-like. I assume it is still butyly and simply did not dry out but is there some other product they used back then on the seam to seal it? doublebutly by Tom Myers, on Flickr Our '63 Holiday Rambler had a similar construction. On the wood framing was a black, tar like butyl tape. Very sticky and hard to remove. The roof and skins did not have overlap or fold-over. This sealed that seam. Then there was traditional putty tape under the edge molding. I call it edge molding because it was a little different shape than traditional J-rail. We built it back the same way. I found both types of butyl on Amazon. One mistake I made was using a single layer of the grey putty under the edge molding on the vertical surfaces. I had spots between the ribs that didn't seal. Had to pull it apart (again!!!) And redo it with little pieces in the low spots between the ribs to get a good seal. |
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Post by vikx on Jun 13, 2020 20:01:04 GMT -8
I haven't been able to make the putty under the flap work either. It is just too bulky. Under J rail, I use RV putty tape (they call it butyl but it is a mixture; it is not pure butyl) after gutter sealing the divots and staples. No leaks so far.
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