The SuperSeal Plus™ joint connection is available in both single-wall and dual-wall duct construction with outer diameters up to 36 inches. The product incorporates a rolling gasket connection that requires no adhesive on the gasket ring. The SuperSeal Plus joints utilize a chemical-resistant O-ring seal to meet the Sheet Metal and Air Conditioning Contractors' National Association's leakage class 3, at ± 10 inches water gauge. It has a mechanically formed symmetrical extrusion used to lock the spiral seams and eliminate seam slippage, the company states.

SEMCO Inc., 1800 East Pointe Dr., Columbia, MO 65201; 573-443-1481; 573-443-6921 (fax); dapsales@semcoinc.com; www.semcoinc.com.

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