Tremco ExoAir Flex
ExoAir® Flex is a single-component, high performance, gun-grade polyurethane flexible foam that performs as a thermal barrier.
Tremco ExoAir Flex is a polyurethane foam from Tremco. Tremco lists it for thermal and sound barrier used in the perimeters around windows and doors. Tremco gives the application temperature as 27 to 95 °F (-3 to 35 °C), which the product and the surface both have to meet on the day. Cranco carries it, and which counter has it on the day changes, so ask at the counter.
ExoAir Flex is Tremco's single-component, gun-grade, closed-cell polyurethane foam for the perimeters around windows and doors, where it works as a thermal and sound barrier. Tremco rates it at plus or minus 15% movement, a movement accommodation factor of 30%, which no other foam Cranco carries publishes.
It goes on between 27 and 95 °F, is tack free in 10 to 14 minutes, holds from -40 to 194 °F once cured, and carries a flame spread index of 5 and a smoke developed index of 5 under ASTM E84. Cranco carries Tremco at Concord, Barrie and Mississauga. Call the branch to confirm the colour and size in stock, and the price.

FEATURES AND BENEFITS
- Single-component polyurethane foam with a(H)CFC-free propellant.
- High yield versus existing polyurethane foams.
- Low water absorption.
- Quick tack-free time.
- Excellent properties at low ambient temperatures.
What is Tremco ExoAir Flex used for?
The perimeters around windows and doors, as a thermal and sound barrier. Tremco's product description adds that the foam protects against thermal expansion and contraction, which is what the movement range is for.
How much movement does ExoAir Flex take?
Plus or minus 15%, a movement accommodation factor of 30%, which Tremco calls an industry leading range for a foam. No other foam Cranco carries publishes a movement figure at all.
How cold can you apply ExoAir Flex?
Tremco's recommended range is 27 to 95 °F, which is -3 to 35 °C, and its storage section repeats the floor: do not install ExoAir Flex Foam when ambient or surface temperatures are below 27 °F. Cured, the foam holds from -40 to 194 °F.
How fast does ExoAir Flex cure?
Tack free in 10 to 14 minutes at 73 °F and 50% relative humidity under FEICA 1014, and a 1 inch bead is cuttable after 45 minutes under FEICA 1005.
Is ExoAir Flex fire rated?
Its ASTM E84 results are a flame spread index of 5 and a smoke developed index of 5. That is a surface-burning classification. Hilti's CF-AS CJP reports 0 on both under the same test, and it carries a residential fireblock listing that this foam does not.
How much does one can of ExoAir Flex fill?
Tremco's theoretical yield under FEICA 1003 is 31.28 litres, 1.1 cubic feet. It packs the foam in 12 to 26 ounce cans and makes it in white only.
Where should you not use ExoAir Flex?
Tremco says to use it only in well-ventilated areas and to protect it from direct exposure to ultraviolet light and driving rain. Store it cool and dry, away from open flame, and inside the temperature the limitations below name.
Where can you buy Tremco ExoAir Flex?
At Cranco's counters in Concord, Barrie and Mississauga. The addresses, phone numbers and hours are further down this page.
Limitations from Tremco
Use only in well-ventilated areas. Protect from direct exposure to UV and driving rain.
Branches
Call the branch to confirm what it has in stock today, and the price.
Documents
- Tremco ExoAir Flex data sheet Tremco data sheet, PDF
- TremGlaze colour chart Tremco, PDF, the TremGlaze sealant range. ExoAir Flex is made in white only.