0711d_EH_NN_NationalGypsum_5.jpg(300)National Gypsum. GoldBond High Strength Lite gypsum board is 25% lighter than the company’s traditional 1/2-inch high-strength panels. The product is certified to the Platinum level of UL Environment’s ISR 100 standard and also is Greenguard certified. 800.628.4662. www.nationalgypsum.com.