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With the right membrane, you can flash when it’s freezing too

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.

Stick way below freezing with Henry

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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