Cold weather foam yield: how much should you allow?

Use the stated litres as a reference, then check the conditions behind your order.

Cold weather can reduce foam yield. Sika Boom ARCTIC’s data sheet lists 65 L (±5 L) per 750 mL can, depending on temperature and humidity, and says lower temperatures decrease yield. It doesn’t give a percentage loss or a yield at each winter temperature, so you can’t calculate an exact winter can count from that figure alone.

Don’t budget every can at 70 litres

Sika advertises yield up to 70 L for ARCTIC, depending on temperature and humidity. Its technical-data entry gives 65 L (±5 L). Those figures describe the same product; neither promises 70 L on a cold installation.

Nor does the ±5 L figure give you a winter allowance. The sheet doesn’t connect that range to particular temperatures or humidity levels. Don’t treat 60 L as a guaranteed minimum for your job.

A cold-weather rating still comes with can-temperature requirements

Working at −20°C? ARCTIC’s stated application range is −25°C to 30°C, but Sika also requires the product to be preconditioned to at least 5°C. Check both requirements before starting.

Check where you’ll store the cans, too. They need to stand upright in a dry spot, out of direct sunlight, at 5°C to 30°C. Below 5°C or above 30°C, Sika says shelf life gets shorter.

Applying below −25°C? The −40°C to 80°C service-temperature range doesn’t allow that. That range covers the foam once it’s in service.

Turn the yield figure into a job estimate

Before you order, measure the gaps and record their lengths, widths and depths. Include changes in gap size rather than working from one convenient measurement.

Then give Cranco or Sika the product name, gap measurements, expected application temperature and planned can conditioning. Ask what quantity allowance they recommend for those conditions. The supplied sheet supports a temperature-dependent yield, but no fixed winter percentage.

On a repeat job, check the coverage you actually get from the first can on comparable work under the planned conditions, then use it to adjust how much you still need. Write down any extra allowance separately. Don’t call it a manufacturer rating.

Keep yield and curing time separate

Before you schedule follow-on work around the listed 24-hour cure time, get Sika to clarify the cold-weather timing. The sheet’s limitations say lower temperatures decrease both yield and curing time. No curing schedule by temperature is given, though.

Start with the [Sika Boom ARCTIC product details](/sikaboom_arctic/) to check whether it fits your job. Buying for frame installation? Browse [window and door foam](/window-door-foam/) as well. When you ask how much to buy, have your gap measurements and expected temperatures ready.