Purchase this product online DUOTACK® 365 is a low rise, two component polyurethane adhesive. DUOTACK® 365 is used to adhere insulation and cover boards to approved substrates. For larger jobs, Mini Drums offer a more cost-effective and labor friendly way to apply the product. Packaged in 15 gallon drums (30 gallon total set), DUOTACK® 365 mini drums are used with special equipment to provide a quicker, easier and more consistent application.