Corr/Guard II, for CAT II, III, and IV condensing gas appliances, eliminates the need for sealant at the joints. Connections are liquid-tight with the specially compounded SII Silicone Gasket, according to the manufacturer. Components are simply butted together and connected with a Vee band connector. No sealant is required. The product is in full compliance with UL 1738 and available in 6-inch – 24-inch diameters.
Metal-Fab Inc., 3025 May Ave., Wichita, KS 67201; (800) 825-2830;www.metal-fabcommercial.com.