AVAILABLE IN MORE THAN 140 INDUSTRY COLORS IN STOCK.                                                             LOW VOC, URETHANE ACRYLIC SEALANT AND ADHESIVE

High Performance, One Component, Urethane Acrylic Emulsion Sealant and Adhesive. Non-Hazardous, Non-Flammable, and Mildew Resistant.

DUO-SIL® is a special formulation of urethane and acrylic emulsion formulated for the professional applicator which can be used as an adhesive or caulking compound for commercial and residential construction. Our pre-formulated colors have been created to work with leading vinyl siding manufacturers.  View our 140 colors in stock and our color cross reference spreadsheet to make color matching a snap on the job.


Application Standards

DUO-SIL® Urethane Acrylic Sealant meets or exceeds the Standard Specifications for Latex Sealants ASTM C-834-00, type C, Grade O°C.

Basic Uses

DUO-SIL® acrylic urethane sealant is a specially formulated high performance acrylic and urethane emulsion sealant that can be used as a sealant and adhesive for bonding most common building substances. Use to fill butt joints in vinyl cement and aluminum siding, windows, doors, brick, moldings, counter tops, and most areas where a sealant is needed. DUO-SIL® is paintable and will not degrade Polystyrene beadboard.  DUO-SIL® as an adhesive has superior bond to most building substrates. It adheres to wood, metal, concrete, gypsum board, vinyl board, cove base, molding, foam board and more.



  • Paintable with oil or latex paints after curing (48 hours)
  • Easy to apply (tooling not recommended)
  • Water clean up
  • Flexible and will not crack or fade
  • Excellent adhesion to most common building substrates
  • Low VOC formulation

Typical Properties

Application Temperature
40ºF - 100º
Approx. 30%
Skinning Time
15 Minutes @ 70°F
Cure Time
1 - 2 Weeks
Hardness Shore A
Temperature Resistance
-30°F to 170°F
Specific Gravity
With most paints
Application Temperature
40°F to 90°F
Uncured Sealant with Water
Shelf Life
12 months
Cool, dry, frost free conditions
Please contact Siroflex® Inc. Greenville, SC prior to writing specifications on this product.


Available in 10.1 fl. oz. (299 ml) plastic cartridges with with 4” screw on nozzle. There are 12 cartridges per case, and 140 cases per pallet.  DUO-SIL® white is available in 10.1 oz, 1-piece tube cartridges and 20 oz. sausage packs.



Available in white, clear and over 140 colors.


  • DO NOT apply below 35° F or when rain or freezing temperatures may occur within 24 hours. Apply when sealant and surface temperatures are between 45° F and 90° F.
  • Not recommended for log homes.
  • Not recommended for prolonged immersion in standing water.
  • Keep from freezing – store at room temperature.

Clean up

Clean up with soap and water.


Available through your local Siroflex® Inc. distributor located strategically throughout the U.S.  Call 1-800-359-6398 or email cservice@siroflexinc.com to find your local distributor.

Notice to Purchaser

Siroflex® Inc. warrants its products to conform to Siroflex® Inc. published specifications. The user shall determine the suitability of the product to their particular application. the foregoing warranty is in lieu of all other warranties expressed or implied, including those of the merchantability or fitness for any purpose not expressly set forth herein. Manufacturer’s and seller’s liability for damage hereunder shall not exceed the purchase value of the goods used. IN NO EVENT SHALL MANUFACTURER OR SELLER BE RESPONSIBLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR IN CONNECTION WITH THE USE OF THIS PRODUCT BY BUYER, BUYER’S USER, OR ANY OTHER PERSON. Notification of claim must be sent in writing to Siroflex® Inc. The notice should contain a statement as to how the product failed to meet our warranty, the proof of purchase and the amount of refund claimed.


Keep out of reach of children.
Do not take internally. Contains propylene glycol and mineral spirits.  For more information please refer to the DUO-SIL® SDS.