DAP DYNAFLEX 920 Premium Elastomeric Exterior Sealant

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    View "Full Pricing Table" below for details including case sizes and volume pricing.
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  • Size
    10.1 fl oz. (clay)
  • Price
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Before ordering, please read the "Product Description & Specs" tab content for more information about this item.

Product Description

The DAP DYNAFLEX 920 Premium Elastomeric Exterior Sealant is a solvent-based, high-performance elastomeric sealant designed for professional installation of siding and windows. It helps prevent air and water intrusions by providing a long-lasting elastomeric seal. Colors are available in a wide variety of shades and provide an aesthetically pleasing finish to any installation. Wet or damp surfaces, as well as extreme weather conditions, can be treated with this product. During the cure period, it will not wash out when exposed to rain. In addition to being crackproof, waterproof, and weatherproof, it is paintable and self-tooling. It meets ASTM C920, Class 25 requirements. Suitable for exterior use.

Features & Benefits

  • Conforms to ASTM C920, Class 25 requirements.
  • Adapts to surfaces that are damp or wet.
  • Works even at temperatures as low as 20° Fahrenheit.
  • Extremely flexible - does not crack under pressure.
  • Resistant to water and weather conditions.
  • Stable against UV rays for a long period of time.
  • MasterSpec Section 07900 Weatherproof Sealants.
  • Suitable for outdoor use.
Country of Origin: United States.

Application Instructions

  1. Cut nozzle tip to allow for a minimum ¼” bead size.
  2. Load cartridge into caulk gun. Apply pressure to burst foil seal inside spout.
  3. Fill gaps and cracks with sealant.
  4. Clean up excess wet sealant from surface and tools with mineral spirits. Scrape or cut away excess dried sealant. Do not use mineral spirits to clean hands or skin. Wash hands or skin with soap and water.
  5. Paintable after fully dried through (7 to 14 days), depending on temperature & humidity.


Technical Information

DAP DYNAFLEX 920 Premium Elastomeric Exterior Sealant
  • Paintable: Yes
  • Filler: Calcium carbonate
  • Odor: Strong solvent
  • Shelf Life: 24 months
  • Application Temperature Range : 20ºF to 120ºF
  • Paint Ready Time: 7-14 days
  • Mildew Resistance: Cured sealant is mold & mildew resistant
  • Country of Origin: United States
Note: Specifications are those given by manufacturers and are not tested for accuracy.

Download Datasheets

The following downloads are available for this product:

Download Safety Data SheetDownload Technical Data Sheet

DYNAFLEX 920 Standard sizes


10.1 fl oz. (clay)

DYNAFLEX 920/ 101

UPC = 070798895003

Single Item (1-11 Items)

1 - 4 Cases (12-59 Items)

5 - 9 Cases (60-119 Items)

10+ Cases (>= 120 Items)


a 16% discount

a 16% discount

a 17% discount





Question & Answers

User Reviews

Made in the USA
hot melt rubber (synthetic)
Offers the widest range of application flexibility available. Exhibits excellent processing performance whether manually or automatically applied. Has superior tensile strength, adhesion properties and holding force which ensures consistent, reliable seals. Hot melt adhesive will bond faster to a surface which is referred to as quick-grab or quick-stick. It typically has higher tack (will feel stickier to the touch), but is also softer. It has lower heat resistance, shear resistance, and sometimes UV resistance than an acrylic adhesive. NOTE: it is called hot melt because the adhesive is applied hot by the manufacturer and then hardens as it cools (you do not need to apply heat to the tape yourself).
natural rubber
Properties are similar to that of hot melt rubber, but natural rubber often holds where other adhesives won't (recycled fibers, dust, cold, heat and heavy loads). It provides good overall adhesion and moisture resistance.
Offer excellent performance, especially for applications in temperatures less than 40°F and greater then 120°F. It provides excellent clarity, has high shear strength, is usually more permanent/durable even when exposed to moisture, and it ages well over extended periods in fluorescent and sunlight. Since it remains clear for the life of the application and does not yellow over time it is ideal for applications such as sealing white cartons. While it has good initial adhesion it does take 24-48 hours to cure and to achieve its maximum bond strength (has gradual adhesion buildup). Another difference between hot melt rubber and acrylic adhesive is if you fold tape over making the two adhesive sides touch the acrylic adhesive will remain attached to the carrier (e.g. paper, film) while a hot melt adhesive will stick to itself and pull off of the carrier. It is the best choice for clarity, UV resistance and aging characteristics.
Is great for extreme temperature applications since silicone adhesive can work in continuous operating temperatures from -100°F to 500°F. They also exhibit good chemical resistance, retain electrical properties, and remove cleanly with little or no residue.
zinc oxide
Zinc oxide based adhesive formula is a skin-friendly adhesive which is commonly used on sports medicine tapes.
Thickness, AKA caliper or gauge, refers to the distance from one surface of a tape backing, or adhesive, to the other.
1 mil = 1/1000 of an inch
Examples: 1/16 inch = 62.5 mils; 1/32 inch = 31.25 mils
The cut level indicates how many grams of cutting load a glove can withstand from a sharp blade before being penetrated.
Lower gauge gloves are heavier - have thicker construction, fewer stiches knitted per inch and offer less dexterity.
Higher gauge gloves are lighter - have thinner/finer construction, more stitches knitted per inch and offer more dexterity.
Gloves offered typically runs from 7 to 18 (12 and 13 are in the middle of the scale).
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