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Dynaflex Ultra 10.1 oz. White Advanced Exterior Window, Door, and Siding Sealant (12-Pack)

Includes 12 tubes ($8.78 /tube)
$105.36 /case
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  • Paintable latex flex sealant for exterior and interior use
  • Weatherproof with a lifetime resistance to mold, mildew and algae
  • Maintains flexibility and adhesion and rain ready in 1 hour
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Product Details

DAP DYNAFLEX ultra Advanced Exterior Sealant powered by WeatherMax Technology resists UV fading, chalking, crumbling, cracking and dirt build up so the sealant stays looking clean and new. Permanently flexible with strong adhesion for a long-lasting, weatherproof seal that stands up to the elements and provides All Weather Protection. Easy application with one hour rain and paint ready times for better productivity. Provides lifetime, mold, mildew and algae resistance.

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Specifications

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Questions & Answers

154Questions
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Q:Is this better than the Dnaflex 230?
by|Jan 14, 2023
1 Answer
Answer This Question

A:  Thank you for posting your inquiry. DAP DYNAFLEX ULTRA is a completely new formulation with several significant performance improvements (when compared to DYNAFLEX 230), most notably, DYNAFLEX ULTRA is 1-hour rain & paint ready (DYNAFLEX 230 is rain ready in 24 hours and paint ready in 2 - 4 hours). DYNAFLEX ULTRA Meets ASTM C920, Class 35 and AAMA 802.3 Type 1, AAMA 803.3 Type 1 and AAMA 808.3 Type 1 (DYNAFLEX 230 Meets only ASTM Specification C920, Class 25). Should you have any additional questions, please feel free to contact DAP’s Technical Customer Service Department at 888-327-8477.

by|Jan 17, 2023
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    Q:I used a previously opened bottle (60 days old) to seal one side of a door, and a freshly opened bottle to seal the other side. The freshly opened bottle was dry within 1 hour but the previously opened bottle is still liquid/gummy after 24 hours. Why?
    by|Jan 8, 2023
    1 Answer
    Answer This Question

    A:  Thank you for posting your inquiry on DAP Dynaflex Ultra Advanced Window Door Trim and Siding Sealant. Because you did not provide any background regarding your project (application conditions, surface preparation, bead size and or depth or surface materials), it is difficult to provide a more detailed response or project specific guidance. At your convenience, please contact DAP’s Technical Customer Service Department at 888-327-8477 so that we can obtain some additional information from you and so that we can provide some additional application guidance.

    by|Jan 9, 2023
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      Q:Can this be applied on wet wood to seal a leak?
      by|Jan 6, 2023
      1 Answer
      Answer This Question

      A:  Thank you for posting your inquiry on DAP Dynaflex Ultra. Per product label and supporting product literature: Surface Preparation: Surface must be clean, dry, structurally sound and free of all old caulk, dirt and other foreign material. Should you have any additional questions or require further assistance, please free to contact DAP’s Technical Customer Service Department at 888-327-8477.

      by|Jan 6, 2023
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        Q:Why does this bubble up 24 hours later, it was installed smooth.
        by|Jan 4, 2023
        1 Answer
        Answer This Question

        A:  Thank you for posting your inquiry. Based on your commentary, it typically indicates that the surface was not properly prepared (a bond-breaker was present: dust, wax, grease, oil, moisture, etc.) Because you did not provide any details regarding your experience, it is difficult to provide you with a more detailed reply or product usage guidance. Should you require additional assistance, please contact DAP’s Technical Customer Service Department at 888-327-8477.

        by|Jan 4, 2023
          Showing 1-4 of 154
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          Customer Reviews

          4.5 out of 5
          (3,110)
          • 4.5
            out of 3,110 reviews
          • 80%recommend this product
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          Showing 1-10 of 3,110 reviews
          Worst silicon ever
          I've used all kinds of silicones over the years when a product says tact time 30 minutes I expect it at maybe 70°. The tax time on this was beyond three days when I applied it it was 70° for nearly 6 hours more than enough time for it to tack up good 48 hours later and it was still as wet as I put it on it did not start packing until at least 72 hours later. And the mess that it made is ridiculous I will never purchase this product ever again.
          by
          Response from DAPProductExpertJan 10, 2023
          Thank you for posting your feedback. We are sorry to see your low star review on DAP Dynaflex Ultra Premium Window Door Trim and Siding Sealant. This product is not a silicone as stated in your commentary. In addition, you appear to be comparing an acrylic-latex/water-based formula (DYNAFLEX ULTRA) to a chemically cured/neutral curing silicone formula. These products are fundamentally very different in both chemistry as well as performance characteristics. The comparable DAP formula would be DAP SILICONE MAX Premium All Purpose 100% Silicone Sealant. DYNAFLEX ULTRA is an acrylic-latex (water-based) formula and as such, the sole drying mechanism is the evaporation of water. Dry time can be significantly impacted by cool or humid/damp application conditions and/or by thick (deep) applications of the sealant. As indicated on the product package label and supporting product literature: "Apply in temperatures above 40°F. Do not apply when freezing temperatures are forecasted within 24 hours. Cooler temperatures and higher humidity will slow down dry time.", "Rain Ready and Paintable in one hour (depending on joint depth, temperature and humidity)" and Full Dry Through (Time): 24 Hours." Product applied outside of these recommendations will not perform as designed. Should you have any additional questions or require further assistance, please contact DAP’s Technical Customer Service Department at 888-327-8477. DAP
            I saw that this was popular with a majority of...
            I saw that this was popular with a majority of positive reviews. Unfortunately disappointed. I needed a clear silicone for a cold frame with polyurethane double wall windows. I bought a few tubes “clearly” marked CLEAR but it is WHITE. Why would DAP advertise as clear? It also has been two days, no rain, but the caulk is still not totally dry. I’ve had much better luck with other DAP caulks. I cannot recommend it.
            by
            Response from DAPProductExpertJan 9, 2023
            Thank you for posting your feedback. We are sorry to see your low star review on DAP Dynaflex Ultra Premium Window Door and Siding Sealant. Per product package label and supporting product literature: Sealant applies white and dries clear in 7-14 days (depending on joint depth, temperature and humidity). Additionally, DAP Dynaflex Ultra is not a silicone, nor is it designed, tested, or recommended for glazing applications. DAP offers specialty window glazing compounds for this type of application. The use of any other product for glazing application would constitute an off-label use (misapplication). Should you have any additional questions or wish to discuss this further, please free to contact DAP’s Technical Customer Service Department at 888-327-8477. DAP
            • Verified Purchase
            Does not last
            I worked extremely hard preparing to paint my house 2 years ago. I caulked every single seam on the exterior of my house. Now the expensive paint that I used has come off of the caulk and the caulk is shrinking and peeling away. In most places it doesn't even look like I applied caulk to my house. I am now going to have to go back and recaulk the entire house and repaint.
            by
            Response from DAPProductExpertOct 11, 2022
            Thank you for posting your feedback, we’re sorry to see your low star review on DAP DYNAFLEX ULTRA. We are not clear as to your commentary indicating: “the expensive paint that I used has come off of the caulk”, as you appear to be describing/your photographs appear to depict a performance issue with the paint that was used. In applications where low flexibility paints are applied over more flexible materials (such as caulking compounds), cracking may result when the paint is not able to flex to the same degree as the underlying sealant. Likewise, “shrinking” is not possible once the product is fully cured. Because you did not provide any details regarding your application surfaces, application conditions, application technique or the paints/coating you applied, it is difficult to provide you with a more detailed response or product usage guidance in this format. Should you wish to provide this information, so we can better address your concerns, please feel free to contact DAP’s Technical Customer Service Department at 888-327-8477. DAP
              1 found this review helpful
              Used in a composite deck
              Excellent adhesion, fast curing and expansion, I know its not good for deck joints but I used it on a composite deck that has a very low expansion ratio and worked marvelous, yet to see durability under humidity (summer) and frozen temperatures (winter) but so far its working great
              by
              • Verified Purchase
              • Recommended
              13 found this review helpful
              Dry White Paste Straight From Store
              I'll never know if it's good because it was already dry and opaque in the tube and barely flowed out afger cutting the tip. Supposed to be clear, but this batch came out as a pasty white almost crumbly clay.
              by
              Response from DAPProductExpertApr 4, 2022
              Thank you for posting your feedback, we're sorry to see your low star review on DAP DYNAFLEX ULTRA (CLEAR). As you have described multiple issues; accordingly, we have responded to them in order. With respect your commentary indicating: “already dry and opaque in the tube”. As indicated on the DAP DYNAFLEX ULTRA (CLEAR) product package label and supporting product literature, under label section: “FOR BEST RESULTS: SEALANT APPLIES WHITE & DRIES CLEAR IN 7-14 DAYS” and again under label section: “INSTRUCTIONS: SEALANT APPLIES WHITE & DRIES CLEAR IN 7-14 DAYS DEPENDING ON JOINT DEPTH, TEMPERATURE & HUMIDITY." All of DAP's (CLEAR) acrylic-latex (water-based) sealants will function this way and are labeled accordingly with the information found above, regarding this color changing performance characteristic. None of DAP’s (CLEAR) acrylic-latex (water-based) sealants can be both opaque (white) and dry at the same time (no chemically/physically possible). With respect your commentary indicating: “barely flowed out afger cutting the tip”, cutting the plastic nozzle tip is only the first of a two-step operation to "open" the cartridge. As indicated on the product package label guidance: "2. Cut nozzle at a 45º angle to desired bead size. 3. Puncture inner foil seal.” Failure to puncture the inner foil seal (Step #3) will not permit the product the flow from the application tip as intended. Should you have any additional questions or require assistance, please contact DAP’s Technical Customer Service Department at 888-327-8477. If you would like to verify the age of the material, when calling in please be sure to have the package available, as we will need the production code printed on the package in order to determine the date of manufacture. DAP
                6 found this review helpful
                Should have believed the adverse reviews
                ‘1 Hour Paint Ready, 2 Hour Rain Ready.’ I applied this product in accordance with the instructions. I placed one section of caulk 2 days ago, it rained lightly today, and this caulk ran from the rain. I should have believed the reviewers.
                by
                Response from DAPProductExpertNov 19, 2021
                Thank you for posting your feedback, we're sorry to see your low star review on DAP DYNAFLEX ULTRA. DYNAFLEX ULTRA is a water-based/acrylic-latex formula, accordingly, the sole drying mechanism is the evaporation of water. Dry time can be significantly impacted by cool or humid application conditions or by thick (deep) applications of the sealant. As is the case with all water-based products, they must be applied within temperature range, to dry surfaces and should be applied when humidity is low to moderate. As indicated on the product package label and supporting product literature: “Do not apply when freezing temperatures are forecasted within 24 hours. Cooler temperatures and higher humidity will slow down dry time.” Application outside of these conditions will lead to long dry times and slow performance development. Because you did not provide any details regarding your application, such as application surfaces/conditions, bead size, temperature, humidity, or your application technique, it is difficult to provide you with a more detailed reply or any specific product usage guidance in this format. Should wish to provide these details, so that we can offer you more specific product usage guidance or to recommend a more appropriate product, please feel free to contact DAP’s Technical Customer Service Department at 888-327-8477. DAP
                  5 found this review helpful
                  It's the best thing out there!
                  It's better then sliced bread!
                  by
                  • Verified Purchase
                  • Recommended
                  6 found this review helpful
                  Washed away after 13 hrs
                  Used on metal to wood. Started at 2PM and was done by 8PM. 10AM next day it rained a bit. Now, over 13hrs later, I have black streaks on the wall. Caulk is wet(not just water} to the touch, As of I just applied it 30min ago. Is NOT rain ready in an hour!
                  by
                  Response from DAPProductExpertOct 4, 2021
                  Thank you for posting your feedback. We are sorry to see your low star review on DAP DYNAFLEX ULTRA. DYNAFLEX ULTRA is a water based (acrylic latex) formula, the sole drying mechanism is the evaporation of water. Dry time can be significantly impacted by cool or humid application conditions or by thick (deep) applications of the sealant. As indicated on the product package label and supporting product literature: "Apply in temperatures above 40°F. Do not apply when freezing temperatures are forecasted within 24 hours. Cooler temperatures and higher humidity will slow down dry time." and "Rain Ready and Paintable in one hour (depending on joint depth, temperature and humidity)". Product applied outside of these recommendation will not perform as designed. When more challenging applications are present, DAP would recommend that you consider our line of non-water based fast cure sealants, such as DAP 3.0 Window, Door, Trim & Siding High Performance Sealant. Fast cure sealants such as DAP 3.0 will be surface dry in approximately 30 minutes/through cured in ~24 hours, even in cooler and/or more humid application conditions. Without more details about your application conditions and project specifics, it is difficult to provide a more detailed reply. Should you have any questions or require further assistance, please contact DAP’s Technical Customer Service Department at 888-327-8477. DAP
                    3 found this review helpful
                    miserable failure
                    I caulked a penetration where HVAC lines left my house. The caulk came out white, I put most of the tube in. Everything was within the application specs on the side. It rained about four hours after I put the caulk on, it claims to be rain-fast in two hours. I came back the next day to screw the shroud back on, and saw the caulk had completely run, leaving huge gaps. It was still as wet as it came out of the tube. Even the left overs on the outside of the tube, which were in a dry basement, were still wet/tacky. I double checked I bought clear, it was still completely white. As you can see in the image, even after squeezing the caulk thin, it is white. Last time I save money and settle for a DAP product for $1 less.
                    by
                    Response from DAPProductExpertJun 4, 2021
                    Thank you for posting your feedback. We're sorry to see your low star review on DAP DYNAFLEX ULTRA (CLEAR). DYNAFLEX ULTRA is a water-based (acrylic-latex) formula, the sole drying mechanism is the evaporation of water. Dry time can be significantly impacted by cool or humid application conditions, moisture in the application surfaces, by thick (deep) applications or entrapped application (application into a cavity and/or between surfaces that water cannot pass through). Given your commentary indicating: “I caulked a penetration where HVAC lines left my house” and "I put most of the tube in", it would appear to indicate that the product was not applied in accordance with: “Joint size should not exceed 1" wide by 1/2" deep. For joints deeper than 1/2", use foam backer rod material.” With respect your commentary indicating: “I double checked I bought clear, it was still completely white.”, as indicated on the product package label guidance: "SEALANT APPLIES WHITE & DRIES CLEAR IN 7-14 DAYS. Cooler temperatures and higher humidity will slow down dry time.” Of note: full clarity cannot develop until all of the water contained in the product has evaporated. At your convenience, please contact DAP’s Technical Customer Service Department at 888-327-8477 so that we can obtain some additional information from you and to provide you with guidance on how to proceed. DAP
                      5 found this review helpful
                      Dynaflex never disappoints my projects
                      I purchased this product from Home Depot as I wanted to compare this improved version of Dynaflex against my usual go-to caulk/sealant, which is DAP Dynaflex 230. This particular project involved sealing the perimeter slab concrete flooring of my unfinished basement and the perimeter of the flooring slab in my attached garage. There were also some touch-up places that needed resealing on my vinyl siding where there are penetrations by pipes and electrical wiring. I think it's a big selling point for this product, to come in at least 10 different colors - which are color matched to various manufacturers colored building products. Normally, Dynaflex 230 would be my top pick - but the newer Ultra variety seems to claim it is better at standing up to the elements. Let's see what we found: PACKAGING: Standard 10.1oz caulk tube. There is no inner foil seal to pierce once you cut the end off of the tube. This is a plus if you want to run a very fine bead of the product. MADE IN / ASSEMBLED IN: This product is made in the USA (primarily in Maryland) with US and globally sourced materials. QUALITY: This product is of outstanding quality and has a lot of features that are desirable, especially for those using it on exterior projects. It resists UV fading (unlike most clear silicone sealants) and dirt build-up (unlike almost all silicone sealants), claims to be crack-proof, claims mold/mildew/algae resistance, is 1hr rain and paint ready, can be used on both interior and exterior projects (which is a plus and true due to the very low to no VOC release), adheres to a wide variety of substrates, and claims a 35% joint movement tolerance. MAINTENANCE: No special maintenance is required. Cured sealant handles light washing very well. TEST RESULTS: Overall, this is the quality I have come to expect from the Dynaflex line of products. When it comes to tooling the product, the Dynaflex 230 is far easier to tool than the Ultra. The 7-14 day cure time seems excessive for a water-based product, however it is true that it takes this long for it to fully harden and provide that 'hardened shell' feel. I've always taken exception to the 1hr paint-ready claim. Why would you want to paint a product after an hour that takes 7-14 days to cure? I'd rather wait until it's cured to paint it - if possible. The Ultra will not cover gaps as wide as the Dynaflex 230 will. This Ultra is not meant for gaps wider that 1/2 inch by 1/2 inch wide/deep. You'll need to use backer rod if you're caulking anything deeper. So both the 230 and the Ultra are great products. I must say, that for exterior applications - the Ultra is the better product. The 230 is a close second but certainly a better choice for use as a painter's caulk - which is what I primarily use it for.
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                      • Recommended
                      11 found this review helpful
                      Showing 1-10 of 3,110 reviews

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