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Old 10-15-2005, 10:14 AM
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Seam sealer staying tacky :(

I don't really know what happened, but maybe some of you with more experince have a suggestion.

I applied some urethane paintable seam sealer (cartridge tube) on the seams, starting with the front inner fenders. My welder said to smooth the seams with acetone or thinner.

I did that, and found a lot of the sealer remained tacky a day later (supposed to dry in one hour)
The next seam sealer I layed down without any thinner, just carefully smoothing with a putty knife. It seemed to dry more normally.

The confusing part is that some of the seam sealer I smoothed with the thinner was dry to the touch.

Anyway I recoated the sry seam sealer and surrounding metal with a second coat of zero rust. The zero rust coated dry seam sealer areas are all tacky again. Since some of the original seam sealer is still tacky days later, I don't want to recoat it at all, until I know what's happening.

Anyone have this happen? Suggestions?

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Old 10-15-2005, 03:53 PM
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The seam sealer needs to go over primer preferrably epoxy or scuffed urethane surfacer. What brand sealer are you using? I use 3M UltraproMSP and it cures good and is primeable/paintable while still wet, very toolable as well----you can duplicate any brushed or smoothed factory seam with this stuff. Bob
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Old 10-15-2005, 07:11 PM
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This is the Seam Sealer that I used. I also uploaded some new photos to the gallery, of what I am doing so far.

I am in limbo right now. I don't want to go forward until this is resolved. I could try a heat gun maybe?
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Old 10-15-2005, 07:36 PM
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At the shop I work at, we use Crest products. If you use thinner to make them more brushable or easier to smooth, it will take considerably longer for them to set up, as they want to trap in the solvant.
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Old 10-16-2005, 12:36 AM
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Thanks I am going to try and be patient I have not used any solvents since the wheel wells.

I might ramp up the heat and see what happends
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