DuraVent FasNSeal Flex Rain Cap: finishes the liner top and holds it up
The DuraVent FasNSeal Flex Rain Cap is a cap that finishes the top of a chimney liner and supports it. Its cone shaped top directs condensate, the liquid that collects from exhaust, back into the vent. FasNSeal Flex is DuraVent’s flexible stainless steel liner that carries a high efficiency gas appliance’s exhaust up through an existing masonry chimney. The cap’s storm collar slides over the liner and rests on a separate top cover plate. A draw band tightens the collar around the liner.
Choose a 2, 3, 4, 5, 6, 7, 8, 10, or 12 inch size on this page. An experienced professional handles this work, sealing the top cover plate to the chimney with sealant that stays soft. At least 4 extra inches of liner remain above the plate for the cap to grip. Need the separate plate? See the DuraVent FasNSeal Flex Top Cover Plate. The DuraVent FasNSeal Flex Rain Cap ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.








Commercial projects may require custom parts and unique system designs. Duravent offers complete project assistance:








































