What is the best caulking? - Fiberglass RV
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Old 08-29-2020, 06:44 PM   #1
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Name: Sonny
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What is the best caulking?

I need to caulk around the top of my belly band. Ive read that silicone is not a good option. Any suggestions? Thanks, Sonny
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Old 08-29-2020, 07:02 PM   #2
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Why are you caulking the belly band?
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Old 08-29-2020, 07:36 PM   #3
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I removed the band and filled the seam with flexible sealant. It was leaking bad. Now I'm putting the band back on and I want to seal along the top edge of it. Just to be sure.
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Old 08-29-2020, 07:58 PM   #4
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Got it. So, you're talking the metal band, not the vinyl insert.
Have a read of this thread on the Escape forum. Discusses caulks and uses.
https://www.escapeforum.org/forums/f...nce-16903.html
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Old 08-30-2020, 10:47 AM   #5
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Thanks appreciate it
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Old 08-30-2020, 10:55 AM   #6
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Old 08-30-2020, 01:24 PM   #7
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If you want a permanent seal that will resist UV, use "3M - #5200" marine caulk.
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Old 08-30-2020, 03:43 PM   #8
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Lexel is good.
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Old 11-17-2020, 06:25 AM   #9
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I used Dicor 501LSW Self-Leveling Lap Sealant. This stuff is great for sealing your RV's roof seams and penetrations. It sticks like crazy and flows into all the nooks and crannies. Beware: If you get it on yourself you have to mechanically remove it, if you get it on your clothes, you'll never get it off. Get plenty: I used 1-2 tubes per roof vent and 2-3 per full-width seam, so a full dozen was just the right amount for a 31' RV's three roof vents, two sanitary vents, two seams, and other various roof penetrations. Don't bother with silicone or any other sealant - they won't stick to your roof and they will leak in a couple of months. You can consult!
https://vogeltalksrving.com/best-rv-caulks/#more-1819
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Old 11-17-2020, 10:40 AM   #10
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I have used Geocell ProFlex RV with good success. I wet a small piece of paper towel with mineral spirits. You apply a small bead about 3-4 feet long then wet my finger from the paper towel with mineral spirits and lightly work it with my finger. Looks great when finished. You can get in different colors and clear. I sealed my belly band with the black stuff.
Good video:

I have used lLexel but it seems to skim over instantly and does not work well. It's good for sealing in areas that won't be seen.

Dicor is also good stuff.

Only use 3M 5200 if you don't want to take something apart latter. Use 3m 4200 for that. Watch some utube videos.
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Old 11-17-2020, 12:02 PM   #11
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Caulk

I have to agree .... use marine caulk, which was recommended to me by the manufacturer. Also from what I understand, it is more flexible, which is probably better suited to the movement.
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