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Low Expansion Foam (Tremco ExoAir 'LEF')

Part Number

Sold by: Each       

Type: Can : 750 ml      

Only expands 7%. Perfect for windows and doors.

Tremco ExoAir LEF is a versatile one-component, UL classified, polyurethane foam in a straw grade or gun grade aerosol can designed for window and door and retro-fit installations. This low pressure product reduces air infiltration and prevents heat loss in a variety of applications.

Basic Uses:

Apply Tremco ExoAir Low Expansion Foam onto any clean surface to fill, insulate and seal around windows, door frame joints, beneath base plates, mud sills, T-joints, top plate penetrations, corner joints, exterior cracks, around utility panels, pipes, duct penetrations and much more.
It is specifically designed to be dispensed as a bead for filling cracks, crevices and to fill smaller cavities on flat or irregular surfaces.


Special ergonomically designed straw grade cap for easy, accurate application.
One component foam with a (H)CFC Free propellant.
Low Pressure Build.
High yield versus existing PU foams.
Low air infiltration.
Low water absorption.
Quick, tack free time.


750 ml gun grade cans, 12 cans per case.
Color is Light Green.

Low Pressure Polyurethane Foam Sealant Surface Preparation:
Surfaces should be dry, free from dust, debris, grease and mold release agents.
Surfaces not to be foamed should be protected.
Cleanup is possible with acetone before foam has fully cured.

Due to the size and/or nature of this product, we are not able to ship to the United States.

No returns on consumable supplies.

Calculated at checkout
Current Stock:
  • Buy 12 or above and pay only $14.92 each

Warranty Information

No returns on consumable supplies.

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