Prima Smooth is a single skin, 0.6 mm thick, 316L stainless steel connecting flue pipe for use with wood and multi-fuel appliances with continuous operating temperatures up to 600°C, that can be painted with high temperature paint, as an alternative to vitreous enamel. There is no requirement to apply sealant to the joints, except between the connecting flue pipe and the appliance which should be securely caulked and sealed using ceramic fibre rope and fire cement. Manufactured by an BS EN ISO 9001 registered company. Approved to BS EN 1856-2.