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Open Roads Forum  >  Do It Yourself Modifications and Upgrades (DIY)

 > What is the best type of caulk to use to seal exterior

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hl007

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Posted: 10/11/10 11:01am Link  |  Print  |  Notify Moderator

I need some help in finding out what type of caulk to use to seal the outside of my travel trailer. The caulk that is there now is begining to crack and I would like to seal those areas, especially above the doors and all joints. What is the best for this purpose. Thanks.

hemlox

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Posted: 10/11/10 11:08am Link  |  Print  |  Notify Moderator

I believe Dicor Lap Sealant is what you want to use. Any RV Dealer should have it. Use self leveling on the roof, non leveling on side seams. Hope this helps.


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RoyB

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Posted: 10/11/10 11:26am Link  |  Print  |  Notify Moderator

DITTO on the DICOR RV stuff. What you get from Lowes/Walmart will not do well sitting in the sun. The ultra-vilot rays wil eat it up in no time... (my experience anyway)


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campin'nut

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Posted: 10/11/10 01:30pm Link  |  Print  |  Notify Moderator

hl007 wrote:

I need some help in finding out what type of caulk to use to seal the outside of my travel trailer. The caulk that is there now is begining to crack and I would like to seal those areas, especially above the doors and all joints. What is the best for this purpose. Thanks.


We're dealing with the same thing right now - if you're talking about areas on fiberglass sides. Ours is where the caulk on the topside of trim-work between the siding and skirting began to discolor/yellow and crack. My DH just picked up a Premium Waterproof Silicone by GE which states it is Sun/Freeze Proof and won't crack or crumble. I believe he said the original stuff was some sort of dap that started out pliable but after time, dried out and cracked. There seems to be several types of sealants used, like Butyl which stays soft (and is what they used around our door frame on the exterior), and Dicor for the rubber roof. Hope this helps. JW

LarryJM

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Posted: 10/11/10 05:47pm Link  |  Print  |  Notify Moderator

Unless you want to go to the trouble of doing what I did and use the 3M Marine 4000 UV caulk which from my research is about the best you can use, the locally available Proflex is about the best you can do based on what I have read.

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Chuck&Gail

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Posted: 10/11/10 06:40pm Link  |  Print  |  Notify Moderator

IMHO you can't beat Eternabond. Should NEVER need to be redone, unlike "normal" caulk.


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mapguy

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Posted: 10/13/10 11:05am Link  |  Print  |  Notify Moderator

LarryJM wrote:

Unless you want to go to the trouble of doing what I did and use the 3M Marine 4000 UV caulk which from my research is about the best you can use, the locally available Proflex is about the best you can do based on what I have read.

Larry


Stay away form silicones -these products are very difficult to touch-up in the future without complete removal.

Hands down the 3m 4000 UV is the longest lasting product IME. It is available in white or black -squeeze tube, normal caulk tube and baloney caulk bag sizes.

Edit -a believer in using eternabond too for roof to front/rear cap transitions plus other places mentioned.

pauldub

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Posted: 10/13/10 02:10pm Link  |  Print  |  Notify Moderator

Avoid silicone. Polyurethane is good.

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Posted: 10/13/10 11:01pm Link  |  Print  |  Notify Moderator

The best caulk for sealing joints and seams isn't a caulk at all. Eternabond. Put it on once, and roof maintenance is one less thing you will have to worry about. But if caulk is the way you want to go, Dicor Lap Sealant.


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Posted: 10/13/10 11:18pm Link  |  Print  |  Notify Moderator

What is the best way to remove the existing caulk?

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