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Airseal® 11 is a premium water-based duct sealant providing commercial-grade strength for the toughest applications.

Product Type: Solventless & High Solids Coating, Waterborne Sealant

Application Area: AC Ducts, HVAC Ducts

Application Method: Brush

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Features & Benefits

Features
  • Exceptional flexibility and adhesion High Solids Formula
  • Formulated Indoor and outdoor use
  • Seals High Pressure HVAC Duct Systems
  • Has excellent mold and mildew resistance
  • has smooth texture
  • Freeze/Thaw stable

Applications & Uses

Application Area
Application Method
Pressure Rating

Maximum 16" water column pressure.

Coverage Rate

Approximately 100 sq. feet per gallon at 16 mils. wet film thickness

Clean Up

Use soap and warm water.

Recommended Uses

AIRSEAL 11 is a UL 181 A-M & B-M listed premium quality, high solids, high velocity duct sealant used to pressure seal all types of HVAC duct systems.

Application Instructions

Apply to clean, dry surfaces, free from oils, dirt, and foreign matter. Spread at a minimum 16 mils. wet film thickness with a brush, or pump into well fitted joints. Seal all joints, seams, and penetrations in the ductwork to ensure an airtight system. Dries to touch in one (1) hour. Prior to pressure testing, allow 12 - 24 hours dry time depending on temperature, humidity, and application thickness. Do not apply on outdoor surfaces within 5 hours of possibility of rain or freezing temperatures.

Application Instructions (UL 181 A-M & B-M)

Materials must be applied in strict accordance with the following instructions in order to meet the requirements of UL 181. Allow 48 hours dry time minimum for UL 181 applications.


UL 181 A-M Duct Board:

  1. Fold grooved duct board to form the module, making certain that both ends are flush and the shiplaps are properly sealed.
  2. Staple the duct board flap on 2” centers using outward clinching staples.
  3. Spread mastic base coat onto the surface at a minimum rate of 10 mils. wet film thickness, 3” wide over stapled joint.
  4. Embed fiberglass scrim tape (5 mils thick, 20 x 10 plain weave) into base coat.
  5. Finish with a top coat of mastic, applied at 10 mils. minimum wet film thickness.

UL 181 B-M Flexible Duct/Metal Duct:

  1. Coat around the collar fitting with mastic at 20 mils. wet film thickness, 3” wide.
  2. Pull back jacket and insulation from the inner core. Slide 2” of the inner core over the mastic and collar. Secure with a mechanical fastener.
  3. Pull the jacket and insulation back over core. Secure jacket in accordance with Flexible duct installation instructions.

Properties

Technical Data
ValueUnitsTest Method / Conditions
Solid Content73.0%
Weight (Per Gallon)11.1 - 11.7lbs
Flame Spread (Class 1 Smoke and Flame Rating)5.0UL 723, ASTM E-84, NFPA 90A, 90B and 225
Smoke (Class 1 Smoke and Flame Rating)0.0UL 723, ASTM E-84, NFPA 90A, 90B and 225

Regulatory & Compliance

Regulatory and Compliance
  • Leed EQ Credit 4.1
  • Exceeds all SMACNA Pressure and Sealing Classes.

Packaging & Availability

Packaging
  • 10.5 oz. tubes
  • 1 gal./case
  • 2 gal. pail
  • 5 gal. pail
  • 55/53 gal. drum

Storage & Handling

Shelf Life

18 months in unopened containers

Temperature Limits
  • Storage and Application: 35ºF - 110ºF
  • Service: -40ºF - 200ºF
  • Protect From Freezing. If frozen, completely thaw prior to use. (Passes 5 Freeze-Thaw Cycles).