Model # 18275

Internet #100035980

Store SKU #284425

Store SO SKU #1000058280

DAP Dynaflex 230 10.1 oz. Premium Indoor/Outdoor Sealant


Dynaflex 230 10.1 oz. Premium Indoor/Outdoor Sealant

  • One-touch cycle automatically adjusts for optimal cleaning
  • Seals joints up to 2 in. wide
  • Backed by lifetime guarantee
$412 /each

Frequently Bought Together

Product Overview

DAP DYNAFLEX 230, a 100% waterproof window, door, siding and trim sealant, is a premium elastomeric sealant with silicone-like toughness to withstand the elements. It combines outstanding durability, adhesion and flexibility with easy tooling, paintability, low odor and water clean-up. Highly flexible to handle joint movement without cracking, crumbling or losing adhesion, it is ideal for sealing around window and door frames, siding, and trim both inside and out.

California residents: see   Proposition 65 information

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.




Warranty / Certifications

More Products With These Features


Customer Questions & Answers

If left unpainted does the white turn yellow?

If left unpainted when used in exterior application does this product remain white or does it yellow with age? thx,
Asked by: Anonymous
it sure can
Answered by: CaboBear
Date published: 2016-08-17

Is this product stain-able?

Asked by: CodyB
I know it is paintable. I would imagine it is stainable also.
Answered by: CaboBear
Date published: 2017-05-05

Your packaging says, "silicone tough". does that mean there is or is not silicone in the product?

Asked by: Dad
No, this is acrylic latex.
Answered by: CommunityAnswer
Date published: 2017-06-20

How long does this caulk need to dry?

I am needing to seal an egress window and want something that is quick drying; some of the products on the market take 7-10 days and this is too long to wait.
Asked by: peat14
In my exterior application, this product is not drying or skinning. I write this 4-days since the application. If you need something quick-dry, DAP 230 is not the product for you.
Answered by: MGS
Date published: 2017-06-01
  • y_2017, m_6, d_23, h_14CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_27
  • loc_, sid_100035980, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 95ms

Customer Reviews

Dynaflex 230 10.1 oz. Premium Indoor/Outdoor Sealant is rated 3.5 out of 5 by 43.
Rated 4 out of 5 by from I would buy again but . . . . I have read comments indicating Dynaflex 230 absorbs moisture after drying, does not dry within the time frame published by the manufacturer, and you cannot apply paint until well after the manufacturer's specified time. OK, maybe some validity to those comments, however, drying time is based upon ambient temperature and humidity, and the moisture content of the surfaces upon which the caulk is applied. If the moisture content of the surfaces is high, and if the temperature is low, and if the humidity is high, the product takes an extremely long time to dry. If the moisture of the surfaces is low, the humidity is low and the temperature is above 75, then the product dries per the manufacturer's specifications. One note of caution. If you use a colored caulk outdoors, and you do not plan to paint over the caulk, do not use this caulk. Even after days and days of drying, if the caulk is exposed to rain the caulk surface will turn whitish. If you apply this caulk under low humidity, warm or high temperature conditions, and the surfaces are pretty dry, and you plan to paint over this caulk, this caulk is great!
Date published: 2017-04-26
Rated 5 out of 5 by from I have been using this specific brand and product for multiple years now; for various application... I have been using this specific brand and product for multiple years now; for various applications and in various climatic environments without any issues. Yes I am sure there are reviews in which others will claim failures of the product and I will not dispute them (how could I). What I will say is that I have never encountered a situation when the product is installed according to the recommended application specs that I have experienced a failure of any kind. I use this in lieu of painters caulk which is cheap for a reason and find that it out performs at only a nominal cost increase. It remains flexible and paints well.
Date published: 2017-04-26
Rated 1 out of 5 by from Not good for exterior use in Colorado Big disappointment. Used Dynaflex prior to exterior painting with various gaps and backer rod where applicable. Waited a few days for product to dry. Product did not appear to be cracking after cure time, but within a few DAYS of applying latex paint it began to crack. Regardless of application almost all of it has cracked, especially on the joints of lap siding which it was recommended to be used on. Would not recommend product for exterior use. At least not in Colorado. Only thing worse than paint prep is re-doing the work so soon. Will try Big Stretch and avoid this product in the future.
Date published: 2016-09-20
Rated 1 out of 5 by from 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.
Date published: 2016-01-21
Rated 5 out of 5 by from I have been using this for years inside and outside my house. It is totally awesome. I agree wi... I have been using this for years inside and outside my house. It is totally awesome. I agree with the previous poster that most negative reviews are from those missing the instructions on the bottle of clear DAP. I always use white and it is dried and ready to paint within 4 hours, probably less. I use this all over my house and it has never failed me.
Date published: 2017-02-16
Rated 5 out of 5 by from Good Stuff I have used about 12 tubes of this stuff to seal up my 54 year old house. It works really well. I have used mostly the gray color as my house is painted gray. I think alot of the bad reviews are based off of people who did not read the instructions. There is a BIG DIFFERENCE between the colored stuff and the clear. The CLEAR TAKES A LONG TIME TO CURE. It states right on the tube, the colored stuff is ready for paint in less than 4 hours, but the clear is 7 DAYS. I have a bunch of tubes left and plan on using this exclusively on my house.
Date published: 2016-10-14
Rated 4 out of 5 by from All purpose sealant that works I've been using this product for a general purpose sealant for at least 5 years and have been very pleased with its performance against the weather conditions in Florida. I would recommend this product anytime for general construction
Date published: 2017-03-13
Rated 4 out of 5 by from Boat Cauking I used this product to seal the transom on a 14ft. aluminum boat transom . It worked great.
Date published: 2017-02-09
  • y_2017, m_6, d_22, h_21
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_43
  • loc_, sid_100035980, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 109ms