Moistop Sealant and Liquid Flashing is designed for installing windows and doors and sealing through-wall penetrations. Fortifiber says the one-part, low-VOC, moisture-curing polymer is compatible with most building materials, can fill joints up to 1⁄2 inch wide, and is smooth enough to take paint. Available in 10.1- and 30-ounce cartridges and 20-ounce sausage packs, it can be applied in temperatures from 40°F to 110°F degrees, has a tack time of less than 1 hour, and cures in 24 hours. It’s covered by a 15-year warranty (materials and labor). A 10.1-ounce cartridge is available online for about $9. Fortifiber Building Systems Group,