Rated 3.8 out of 5 by 26
Rated 5.0 out of 5.0 by sd Very Good caulk, I used on my wooden boat sealing planks
I have an old carvel wood hull with mahogany planks. The OEM linseed oil white putty was badly cracked. I wanted to keep out the rain getting between the planks. So I removed the old putty. I primed with zinsser bulls eye primer the wood. Then I filled the seams with the caulk and smoothed it down with my finger. It shrinks some but that is good as I like seeing the plank edges on the hull. Then I painted white acrylic gloss Behr on top. It holds up, no cracks and no leaks since 2014. And you can sand it wet and dry to smooth the surface.
couple pics. and link to album https://photos.google.com/album/AF1QipM_ikHu-OwBivAYqVMNCBAor2mAiPa6uDp7fQcD
February 18, 2016
Rated 1.0 out of 5.0 by CaulkMan ABSORBS MOISTURE
NEVER BUY THIS!!!!!!!!!!!!!!!!!This is horrible caulk. Takes a super long time to dry clear and as soon as it is exposed to rain it will turn white again and swell up from absorbing moisture. Strange why it is advertised to be a waterproof caulk yet absorbs moisture after it is fully cured. This definitely isn't my definition of waterproof! I use several thousand tubes of caulk a year and never had other caulk behave this way. Contacted DAP and they denied anything was wrong with the caulk after testing the samples sent to them. See picture of caulk samples that was exposed to a few days of rain after it was completely clear.
January 21, 2016
Rated 1.0 out of 5.0 by JackOh Doesn't last! Cracks!
I used this to seal wanscoting in our 1/2 bathroom. It started cracking in less than a year. Premium indoor/outdoor sealant? I don't think so.
January 28, 2016
Rated 5.0 out of 5.0 by BvilleBound Great 'final layer' sealant for foam board insulation panels
In addition to all of the typical applications for DAP 230, it is an excellent 'final layer' sealant for XPS and polyiso foam board insulation panels. It does not dissolve the foam and remains flexible as assemblies expand and contract each day.
We recently 'wrapped' the outside of a house in Massachusetts with 2" Foamular XPS panels, for example. We sealed all of the joints and edges first with the 'Windows and Doors' version of Great Stuff, which remains flexible. Then we covered all of the joints and edges with a generous layer of DAP 230, to make sure all of the air leaks were well sealed. A couple of photos are attached.
I hope this is helpful.
September 26, 2015
Rated 1.0 out of 5.0 by posser It grows mildew
This would be a great product except it loves to grow mildew. Its a shame because that is the only major drawback but it is a big drawback. Give it a couple of years and you will see your siding and window sills turn filthy grey wherever they have been caulked.
March 10, 2016
Rated 1.0 out of 5.0 by gutterman beware of this caulk
the calk is easy to use, but does not perform well on exterior use . Can result in expensive damage when used on gutters, siding and trim. When I used it to seal gutters as specified on cartridge not only failed but turned into a liquid and stained the outside of the gutters. I do not think this caulk should come in contact with water.
January 4, 2016
Rated 1.0 out of 5.0 by Richard dynaflex 230 failer
put Dap Dynaflex 230 caulk on 5 days before it rained.I made sure it was clean and dry.It had started to go clear. How ever I have no control with the in October weather.after it rain last night I opened my metal cellar door and saw it had leaked through everywhere i had caulked inside and out.Also no more clear but turn back to white.As a premium product put down in warm and dry metal to concrete it should not have failed.Now how do I correct this?
October 24, 2015
Rated 1.0 out of 5.0 by frustr8ted Does NOT hold up!
This was used on both the inside and outside of our windows by a contractor. We ended up with leaking windows and 1k+ in damages due to dry rot in under 2 years. When we removed it it was still tacky and was originally applied in the summer. I don't recommend using this, period.
August 21, 2015