SikaBoom AS-PRO Polyurethane Foam
Sika Boom AS-PRO is a one-component, low expansion, CFC-free polyurethane foam.
SikaBoom AS-PRO Polyurethane Foam is a polyurethane foam from Sika. Sika lists it for installation of window and door frames, filling gaps and voids, sealing out dust, noise and draft. Sika gives the application temperature as -12 to 30 °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.
SikaBoom AS-PRO is Sika's one-component, low-expansion, CFC-free polyurethane foam for window and door frames. It guns between -12 and 30 °C, is tack free in 6 minutes give or take 2 at a 1 cm bead, can be cut after 20 to 45 minutes, and cures in 24 hours.
One 750 mL can yields about 40 litres, it is UL 723 classified under ASTM E84 and CAN/ULC-S102-10, and its VOC content is under 2.0 g/L. Cranco carries Sika at Concord, Barrie and Mississauga. Call the branch to confirm the colour and size in stock, and the price.

FEATURES AND BENEFITS
- May be applied year around at temperatures between -12 °C and 30 °C.
- Low expansion helps prevent bowing or warping of window frames and other elements.
- Environmentally Friendly: CFC and HCFC-free.
- Low VOC, less than 2.0 g/L (LEED - SCAQMD, Rule 1168).
- UL 723 Classified (ASTM E84), CAN/ULC-S102-10.
What is SikaBoom AS-PRO used for?
Installing window and door frames, filling gaps and voids, sealing out dust, noise and draft, filling penetrations in walls, and air sealing and insulating. Sika's reason for the low expansion is that it keeps a window frame from bowing or warping as the foam rises.
How cold can you apply SikaBoom AS-PRO?
Down to -12 °C, and up to 30 °C, which is what the all-season name refers to. Cured, it holds from -40 to 80 °C. Sika says lower temperatures cut both the yield and the curing time, so a cold can gives fewer litres than the 40 on the sheet.
How fast does SikaBoom AS-PRO cure?
Tack free in 6 minutes plus or minus 2 at a 1 cm bead by ASTM 1622, cuttable after 20 to 45 minutes, and cured at 24 hours. A wider bead takes longer than the 1 cm Sika tests at.
Can you paint SikaBoom AS-PRO?
Sika's only sentence about paint is a limitation: paint or coat the cured foam for best results in outdoor applications, because cured foam discolours under ultraviolet light. Paint is a protective coat on this product, and Sika publishes no paintability specification for it.
How much does one can of SikaBoom AS-PRO fill?
About 40 litres, plus or minus 5, from a 750 mL can, and Sika ships 12 cans to a case. Yield moves with temperature and humidity, and a cold can gives less.
Is SikaBoom AS-PRO fire rated?
It is UL 723 classified under ASTM E84 and CAN/ULC-S102-10, with a flame spread of 10 and smoke developed of 15 under UL file R38677. That is a surface-burning classification. For a residential fireblock listing, Hilti's CF-AS CJP carries one and this foam does not.
How long does SikaBoom AS-PRO keep?
Fifteen months from production in the original sealed can, stored upright and dry, out of direct sun, between 5 and 30 °C. Sika says storage above 30 °C or below 5 °C shortens that.
Where can you buy SikaBoom AS-PRO?
At Cranco's counters in Concord, Barrie and Mississauga. The addresses, phone numbers and hours are further down this page.
Limitations from Sika
Storage above 30°C and below 5°C shortens shelf life. Lower temperatures decrease yield and curing time. Paint or coat cured foam for best results in outdoor applications. Cured foam will discolour if exposed to ultraviolet light.
Branches
Call the branch to confirm what it has in stock today, and the price.
Data sheet
- Sika Boom AS-PRO data sheet Sika Canada, PDF, December 2018