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Internet # 100035980

Model # 18275

Store SKU # 284425

Store SO SKU #1000058280

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Dynaflex 230 10.1 oz. White Premium Elastomeric Exterior/Interior Window, Door and Trim Sealant

$6.48
Buy 12 or more $5.83
  • Long lasting, all-purpose acrylic latex plus silicone sealant
  • Seals joints up to 1 in. wide in windows, doors and siding
  • Interior and exterior, 100% paintable and crack resistant
  • View More Details

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Product Details

About This Product

DAP Dynaflex 230 is a premium elastomeric latex sealant with silicone-like toughness. This DAP sealant combines outstanding durability, adhesion and flexibility with easy tooling, paintability, low odor and water clean-up. It is highly flexible to handle joint movement caused by variations in temperature and humidity without cracking making it an excellent choice for outdoor use. Provides a long-lasting, durable seal that is 100% waterproof and weatherproof. Ideal for caulking and sealing air leaks around windows, doors, siding, trim and baseboards to improve the energy efficiency of a home and reduce utility costs. Cured sealant is mold and mildew resistant. Meets ASTM Specification C920, Class 25. VOC compliant. Interior/exterior use. DAP caulk and sealants provide durable performance for a variety of projects.

Highlights

  • Step-by-Step How to Caulk like a Professional
  • DAP Dynaflex 230 sealant is Silicone tough with superior flexibility and crackproof performance; use for windows, doors, siding, trim, baseboards and more
  • Dynaflex 230 is a premium elastomeric latex paintable sealant that creates a 100% waterproof sealant that provides a weatherproof seal
  • White sealant seals joints up to 2" wide and performs like silicone providing a highly flexible sealant that handles joint movement without cracking
  • Premium elastomeric latex sealant is low in odor and cleans up with water
  • Adheres to a wide range of building materials indoors or outdoors, such as wood, MDF, PVC, polystyrene, and composite trimboard; meets ASTM Specification C920, Class 25
  • May be painted in 2 hours, if desired and covers 55 linear feet at a 3/16 in. bead size
  • Cured sealant is mold and mildew resistant, keeping the caulk looking clean and fresh
  • Fully cures in 24 hours
  • Best Caulks and Sealants for Your Home Improvement Projects
  • How to use a caulk gun
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 100035980

Model # 18275

Store SKU # 284425

Store SO SKU #1000058280

Additional Resources

Shop All DAP

Specifications

Individual size (oz.): 10.1 oz

Dimensions

Individual size (oz.)

10.1 oz

Details

Caulk and Sealant Application

Window & Door

Caulk and Sealant Type

Siliconized Latex

Color/Finish

White

Dry Color Family

White

Dry to Touch (min.)

30 min

Features

Elastomeric, Moisture Resistant, Mold and Mildew Resistant, Permanently Flexible

Interior/Exterior

Exterior, Interior

Number of Tubes Included

1

Professional Paint Supplies & Values

Pro Supplies

Returnable

90-Day

Sealant Form

Standard Tube

Transparency

Solid

Warranty / Certifications

Manufacturer Warranty

See Product Package

Questions & Answers

Is this caulk polyurethane?
ByJul 10, 2026
1 Answer | 
Answer This Question

Thank you for posting your inquiry on DAP DYNAFLEX 230. DYNAFLEX 230 is an acrylic-latex formula and is not formulated to contain polyurethane. Should you have any additional questions or require additional application guidance, please feel free to contact DAP’s Technical Customer Service Department at 888-327-8477.

By|Jul 13, 2026


    Can unopened DYNAFLEX230 still be used years later?
    ByJul 8, 2026
    1 Answer | 
    Answer This Question

    Thank you for posting your feedback on DAP DYNAFLEX 230. DYNAFLEX 230 has a 12 month shelf life from the Date of Manufacture (when unopened/stored properly). DAP does not recommend its use after this timeframe has elapsed. Should you have additional questions or require additional assistance, please feel free to reach out to DAP’s Technical Customer Service Department at 888-327-8477.

    By|Jul 9, 2026


      How high of temperature can this product be used for
      ByJul 2, 2026
      1 Answer | 
      Answer This Question

      Thank you for posting your inquiry on DAP DYNAFLEX 230. As indicated on the product package label and supporting product literature: “Typical Cured Performance Properties - Service Temperature Range: -30ºF to 180ºF.” Should you have any additional questions or require further assistance, please contact DAP’s Technical Customer Service Department at 888-327-8477.

      By|Jul 6, 2026


        How high of temperature can this product be used for
        ByJul 2, 2026
        1 Answer | 
        Answer This Question

        Thank you for posting your inquiry on DAP DYNAFLEX 230. As indicated on the product package label and supporting product literature: “Typical Cured Performance Properties - Service Temperature Range: -30ºF to 180ºF.” Should you have any additional questions or require further assistance, please contact DAP’s Technical Customer Service Department at 888-327-8477.

        By|Jul 6, 2026


          Will this product adhere to an area where vinyl siding butts against asphalt?
          ByJun 15, 2026
          1 Answer | 
          Answer This Question

          Thank you for posting your feedback on DAP DYNAFLEX 230. DAP DYNAFLEX 230 is designed, tested, labeled and marketed for use as a trim and molding sealant, it is not designed, tested, labeled, marketed or recommended for use in driveway applications. Should you have any additional questions, please feel free to reach out to DAP’s Technical Customer Service Department at 888-327-8477.

          By|Jun 17, 2026


            Can this product be used for filing cracks and checks in log home logs?
            ByJun 10, 2026
            1 Answer | 
            Answer This Question

            Thank you for posting your inquiry on DAP DYNAFLEX 230. DAP DYNAFLEX 230 is designed, tested, labeled, and marketed for use as a window, door, siding, trim, and molding sealant. It is not designed, tested, labeled, marketed, or recommended for use as a log home (chinking) sealant. Should you have any additional questions or require further assistance, please contact DAP’s Technical Customer Service Department at 888-327-8477.

            By|Jun 10, 2026


              Will this sealant, once dry, be able to keep a seal when always kept submerged in water?
              ByJun 3, 2026
              1 Answer | 
              Answer This Question

              Thank you for posting your inquiry on DAP DYNAFLEX 230. As indicated on the product package label and supporting product literature: "Not for continuous underwater use or filling surface defects." Should you have any additional questions or require further assistance, please feel free to contact DAP’s Technical Customer Service Department at 888-327-8477.

              By|Jun 9, 2026

                (1)

                Is it paintable
                ByJun 3, 2026
                1 Answer | 
                Answer This Question

                Thank you for posting your inquiry on DAP DYNAFLEX 240. As indicated on the product package label and supporting product literature: "Paintable" and "Allow sealant to dry clear (approximately 7-14 days) before painting with latex or oil-based paints.". Should you have any additional questions or require further assistance, please contact DAP’s Technical Customer Service Department at 888-327-8477.

                By|Jun 9, 2026

                  (1)

                  Viewing 1-8 of 331

                  Customer Reviews

                  4.5 out of 5

                  • 4.5 out of 3,307 reviews
                  • 76% recommend this product
                  Filter by:
                  Showing 1-10 of 3,307 reviews
                  Applied smoothly as a white sealant but turned clear within a day a promised. Filled the areas easily and clean up was a breeze. You can see how clear it is in the picture around the light.
                  by
                  DAP Dynaflex 230 Premium Elastomeric Exterior/Interior Window, Door and Trim Sealant is our go-to for sealing between countertop materials and adjacent surfaces. It cures quickly for paint and holds up well over the years.
                  by
                  DAP Dynaflex 230 was easy to work with and didn't have too strong of a smell. Smoothed out easier than other caulking products I have used. I would recommend starting with a smaller bead, it fills in easily and can be messy to clean up if too much gets put down.
                  by
                  This caulk was wonderful to seal around the new door and frame that I purchased at Home Depot. It fits right into the caulk gun to make it easier to apply the caulk.
                  by
                  DAP Dynaflex 230 white premium/exterior window, door and trim sealant is a great product. I use it on all of my projects. It is durable and easy to clean and it is easy to work with. I recommend this product.
                  by
                  Easy to apply and to work. Like that this caulk maintains flexibility after curing. Haven't had problems with it cracking after it is cured.
                  by
                  Used as replacement caulk for deck 3 season enclosure restaining deck wood. Used same 8-10 years ago and it held up good. Did get mold on it from being on north side of house. Always have a tube around as a go to. Just wish manufacturer would come up with a resealable tip design that works.
                  by
                  This product is proving to be very good for my particular situation. We are filling in cracks on a some old barn siding to mitigate water leakage, prevent insect and other pests from entering via cracks and seal against drafts. Very pleased with this product so far and Im plan to purchase more of it.
                  by
                  Great caulk, easy to apply. Used for the first time, hope it won’t crack as the other one.
                  by
                  • Verified Purchase
                  Good Product!
                  This caulk is great! It applies nicely and is easy to wipe away and clean up afterwards. I used it to seal around a door and it worked well. It does seem to change colors a bit after drying, but I’m still happy with it.
                  by
                    • Recommended
                    Showing 1-10 of 3,307 reviews