Ideal for use under brick, stone, stucco, EIFS, and other siding, USG’s new Securock UltraLight Glass-Mat Sheathing is up to 20% lighter than similar products on the market, the maker says. The 5/8-inch sheathing features a re-engineered high-strength, lightweight gypsum core and a coated fiberglass facer mat and back to maximize coverage of air and water barrier systems. The low-VOC material achieved a perfect score on ASTM D3273 tests for mold. Check for pricing and availability from local dealers as Securock UltraLight Glass-Mat Sheathing rolls out regionally this spring.