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Old 10-11-2012, 06:31 PM  
RickMerlander
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Default Which is the best exterior latex caulk?

I am caulking cedar siding in Hawaii. Direct sun exposure. I want to use the longest lasting latex caulk available. Locally my choices seem to be DAP Alex Plus or Dynaflex or Acrylic One from Glidden. Any opinions as to which will hold up the best? Their is little difference in price. Thanks.



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Old 10-11-2012, 07:49 PM  
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Welcome to the forum Rick!

Out of those three I would vote for the 55yr elastomeric by Glidden. If you have big gaps that will contract and expand I would go with Big Stretch.

I would also never caulk the laps.



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Old 10-11-2012, 10:41 PM  
RickMerlander
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Welcome to the forum Rick!

Out of those three I would vote for the 55yr elastomeric by Glidden. If you have big gaps that will contract and expand I would go with Big Stretch.

I would also never caulk the laps.

Thanks for the advice on the caulks. Why not caulk the laps - because the lumber may warp and open up the joint? If so, is this as much a problem with cedar, which is what I am using? Or? Thanks.
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Old 10-13-2012, 06:01 AM  
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Why not caulk the laps - because the lumber may warp and open up the joint? .
Because the laps are technically a vent that allows the siding to breathe. I'm not sure if it will be that big of an issue in your climate, but in northern climates it is.
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Old 10-13-2012, 06:55 AM  
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Just a follow up. Check out this company if your lapps are already caulked/painted. http://www.wedgevent.com/

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Old 10-14-2012, 12:32 AM  
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Just a follow up. Check out this company if your lapps are already caulked/painted. http://www.wedgevent.com/
Will do. Thanks a lot for the tip and the link.


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