As experienced cold-weather contractors know, applying self-adhered flashing membranes in low temperatures is tough. While many flashing adhesives perform well in moderate to high temperatures, few are designed to handle the cold.
Consider SBS-modified bitumen flashing. These traditional membranes are made from rubberized asphalt and use a rubber-based adhesive. These membranes are cost-effective, but their rubber-based adhesives don’t perform as well in the cold, particularly when temperatures drop below 40 °F (4 °C).
Butyl-based flashing membranes offer much better cold-weather workability than modified bitumen membranes. They are more flexible in the cold, and many will adhere down into the 20 °F (6.6 °C) range.
Fortunately for today’s builders, there is a newer type of flashing membrane adhesive that will stick in sub-freezing temperatures – the proprietary block copolymer, featured on Henry® FortiFlash® 365 Waterproof Flashing Membrane.
The adhesive on our FortiFlash 365 is formulated from an advanced block copolymer that will adhere in temperatures as low as 0 °F (-18 °C). The adhesive is strong enough to keep the flashing in place on a range of exterior surfaces without the use of metal fasteners (FortiFlash 365 membrane actually self-seal around fasteners or nails).
FortiFlash 365 also features a metallized facer that resists UV rays for a full year. So it can be left exposed long after a wintertime application. And as its “365” name suggests, FortiFlash 365 can be installed year-round, adhering equally well in temperatures as high as 150 °F (66 °C).
Part of our Fortifiber® 1-2-3 Moisture Control System, FortiFlash 365 is truly an all-weather, all-temperature flashing that you can count on in the cold, and stick with all year long.
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