This Foam Duct Sealant Kit from American Polywater is an essential solution for effectively sealing ducts and preventing air leaks. Offered in a bulk pack of six 8.5 oz kits, it ensures you have an ample supply for your projects. With a notable shelf life of 15 months, you can confidently stock up, knowing the sealant remains reliable and ready for use when you need it. This sealant is designed for seamless application, making it an ideal choice for both professional and DIY duct sealing needs.