VaproAirSeal™ an air and watertight single component sealant for interior seal of installed windows

  • Improves air and water tightness of fenestration systems; sealing the interior window frame to the window rough opening flashing.
  • Air and watertight - bonds to VaproShield materials without primers (or priming).
  • Wide Range Temperature application:  -40° to 140°F (-40° to 60°C).
  • Permanently Flexible - allowing for +/- 50% joint movement.
  • Paintable – in two (2) hours
  • Emits very low VOCs – contains no solvents.
  • Compatibility - Compatible with all VaproShield membranes and accessories. 


Typical VaproAirSeal Applications

VaproAirSeal 1

VaproAirSeal 2


pdf Product Data Sheet (PDF) (714 KB)

VaproAir Seal Product Data Sheet 050119 Page 1

pdf SDS (PDF) (423 KB)

2018.11.19 VaproAirSeal SDS Page 1


VS 170 VaproLiqui Flash Interior Air Seal 101316

Testing Data


Service Temperature -40°F (-40°C) - 140°F (60°C)
Skin Time Less than 20 min. @ 77°F (25°C)/50% RH
Tack Free Time < 60 minutes @ 25 °C (77 °F)/ 50% RH
Cure Rate ¼” (6.35 mm) 48 hours
VOC < 23 g/L
Elongation @ Break 200-250%
UV Rating No discoloration or change in appearance after 2500 hours of UV
Lap Shear 0.62 MPa (90 psi)
Tensile Strength 1.03-1.38 MPa (150-200 psi)


Durometer Hardness, Shore A ASTM C661 Standard Test Method for Evaluating Degree of Cracking of Exterior Paints 35 +/- 5
Tensile Strength ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension 1.03-1.38 MPa (150-200 psi)
Elongation at Break ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension 200-250%
Lap Shear ASTM C961 Standard Test Method for Lap Shear Strength of Sealants 0.62 MPa (90 psi)
Low / High Temp Flexibility   minus 68 °C (-90 °F) / 218 °C (425 °F)


Related Products

WrapFlashing is simply the field membrane pre-cut into rolls of different sizes helping to save labor and reduce waste. WrapFlashing is used to cover membrane laps, flash around windows, rough openings and penetrations.

vaproflashingSA revealflashingSA vaproflashing revealflashing
WrapFlashing SA Self-Adhered
Roll Sizes: 11 ¾ or 19 2/3” x 164’
More information
RevealFlashing SA Self-Adhered
Roll Size: 11 ¾” x 102’ 
More information
Roll Sizes: 11 ¾ or 19 2/3” x 164’ 
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Roll Sizes: 6 ½” or 11 ¾” x 164’ 
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Choose Your Rough Opening Materials:

VS Flashing LiquiFlash
VS Flashing SSflashing
Vapro-SS Flashing
VS Flashing VaproBond