Model # 18275

Internet # 100035980

Store SKU # 284425

Dynaflex 230 10.1 oz. Premium Indoor/Outdoor Sealant



Model # 18275

Internet # 100035980

Store SKU # 284425

Store SO SKU # 1000058280

The DAP Dynaflex 230 10.1 oz. Premium Indoor/Outdoor Sealant in white combines durability and permanent flexibility with the paint ability and low odor of a latex sealant. It is ideal for sealing air leaks in windows and doors.

California residents: see  Proposition 65 information

  • Acrylic latex formulation is durable and permanently flexible
  • Blocks drafts and keeps out moisture and pests
  • Paintable to match any surface
  • Mold and mildew resistant
  • Crack proof
  • Cleans easily with water
  • Exceeds ASTM C 920, Class 25
  • Meets ASTM C 920, Class 25 and TT-S-00230C, Class A Specs
  • Subject to or will include a recycling fee in the following states: CA, OR

Info & Guides

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Individual size (oz.) 
Caulk Form 
Standard Tube 
Caulk Type 
Coverage (linear ft.) 
Cure time (hours) 
Dry color family 
Dry to touch (min.) 
Fire and high heat resistant 
Longevity (years) 
Moisture Resistant 
Mold and mildew resistant 
Paint Product Type 
Permanently flexible 
Professional Paint Supplies & Values 
Pro Supplies 
Warranty / Certifications
Certifications and Listings 
ASTM Compliant 
Manufacturer Warranty 
50 Year Satisfaction Guarantee 


Paint Product Type: Sealants
Caulk Type: Latex
Price: $0 - $10
Brand: DAP
Review Rating: 3 & Up


Rated 4.1 out of 5 by 22 reviewers.
Rated 5.0 out of 5.0 by 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. Mark September 26, 2015
Rated 1.0 out of 5.0 by 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 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 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 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 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 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 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
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