Rated 4.1 out of 5 by 22
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 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 5.0 out of 5.0 by Mike Best caulk I have ever used
Dynaflex 230 adheres very well to a variety of surfaces including vinyl, aluminum siding and masonry. It is easy to work and takes paint well. I used it on several exterior windows and doors I installed last year and the caulk today looks like the day i applied it - very flexible with very good bonding characteristics. I highly recomend the product.
June 12, 2015
Rated 5.0 out of 5.0 by Doresoom Good Stuff
Works great, easy to apply, economical... what's not to like?
I use this for all the trim in my house. Recently I installed a laminate floor in my guest bedroom, and this caulked worked great to seal the prefinished quarter round and the existing baseboards. It matches the trim perfectly and makes it look like one piece! I also used it for filling in the nail holes as well.
Clean up is easy, since it's water based. Just keep a damp paper towel with you as you work. You don't need any special tools for smoothing it out either. Just a wet fingertip!
January 8, 2015
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 5.0 out of 5.0 by PatsPOV best caulk
I've used other cheaper caulk, big mistake. Get this stuff works great, sticks well, doesn't crack or dry out. Even better if you paint over it.
It doesn't like constant exposure to water so I don't use it where it could be wet for a long time. In places like that I use 100% silicon but then you can't paint over it and it's even messier to clean up.
In any case, don't get the cheap caulk, and if you have someone working for you, don't let them use it either.
September 27, 2012
Rated 5.0 out of 5.0 by AIRbyDzn DAP dynaflex 230
This is not just a caulk - this is a sealant. When cured you would think it had silicone in it, but it doesn't, so it doesn't smell bad. Easy cleanup. 50 yr warranty. Great product!
July 1, 2010
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