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Model # 18275

Internet # 100035980

Store SKU # 284425

Dynaflex 230 10.1 oz. Premium Indoor/Outdoor Sealant

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$4.12 /each


Model # 18275

Internet # 100035980

Store SKU # 284425

Store SO SKU # 166706

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 


Rated 4.6 out of 5 by 18 reviewers.
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 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 3.0 out of 5.0 by Looking for Better I've used more than 10 tubes over a period of several years. It's relatively easy to work with. The main reason I'm looking for something else is that unpainted on the exterior it becomes very dirty looking. I've also had more cracking than I wish- perhaps other caulk would work no better, but I'm looking. July 14, 2014
Rated 4.0 out of 5.0 by works well holding up works well holding up can"t say for long term only up for 90 days. It works well so far November 16, 2013
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 5.0 out of 5.0 by top rated by a major magazine Dap 230 was just rated in Journal of Light Construction magazine, May 2013 in an article about caulks and sealants. They said it was "an economical caulk that performed better than most other conventional caulks". May 26, 2013
Rated 5.0 out of 5.0 by works well with doors and windows Easy to use. Looks great works well with doors and windows. Interior and also exterior. October 15, 2013
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Store Exclusive. This item is available for purchase in select stores only.