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Old 07-14-2017, 04:25 PM   #1
LEV ZEPPELIN
 
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2004 19' International CCD
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Sikaflex primer 429 before caulking???

Anyone use this? Suppose to dry in a few minutes and then use Sikaflex caulk for roof. I am going to use Sikaflex 1a but was trying to decide how best to prep before caulking for a good bond.

Your thoughts appreciated.

Jonathan
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Old 07-15-2017, 12:28 PM   #2
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I seem to recall lewster mentioning the sikaflex primer in another post. But I just use carburetor cleaner to prep the surface and clean off old polyurethane. Works great.
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Old 07-16-2017, 01:57 PM   #3
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Thanks Greatley.

So when you use the carburetor cleaner, is that just something that preps the surface of the old remaining caulk or does it actually dissolve and remove the old caulk?

If it is just a prep, how long does it take to dry before you can apply the Sikaflex caulk. The guy at the store that was trying to sell me the 429 said that it takes that stuff to dry about ten minutes.

The reason I ask is my trailer is about 45 minutes away from me and I'd like to do everything on the same visit.

Advice?

JL
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Old 07-16-2017, 02:13 PM   #4
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Both. Use lots of carb cleaner and scrubbing with a rag and a 3m wheel to get old caulk off. Give it a good spray and a wipe clean to prep the surface. Dries within a few seconds. Doesn't contain alcohol so it won't interfere with polyurethane curing.
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