Hardcast recommends Foil-Grip butyl tape for use with galvanized steel duct, duct board, or flex duct. Hardcast Foil-Grip™ 1402 3 in. x 100 ft. Silver Aluminum Premium Grade Duct Tape / $ 24.92 HP Products 4 Mil Large Size Disposable Nitrile Glove (Box of 100) / $ 9.88 Product Details Hardcast AFG-1402 Duct Tape Foil Grip 3 Inch x 100 Feet Silver Aluminum Foil 17MIL 35 to 110 Degrees Fahrenheit Hardcast Foil-Grip™ 1402 2 in. DT-5300 is a mineral-compound-impregnated fiber tape that works in conjunction with the RTA-50. These adhesive are applied to either the metal or insulation surface and are differentiated by their dry times. DT-5300 is a part of the industry standard two part system for low, medium and high pressure duct systems. for pricing and availability. Silver Aluminum Premium Grade Duct Tape Thin foil tape works but tears easily. Foil-Grip 1404-181-BFX is a UL 181B-FX listed pressures sensitive rolled mastic sealant. The answer is in the article on this page: butyl duct tape. I don't use the term "hardcast" asbestos for the material in your photo - I use the term asbestos paper ductwrap or seam wrap because the material is a thin (perhaps 1/8" or less) asbestos paper product, typically applied wet or dampened to allow installation around bends and to adhere to the metal duct surface. Part #: HAR304100 138. This Item: Hardcast Foil-Grip™ 1402 2 in. x 100 ft. Silver Aluminum Premium Grade Duct Tape. You don’t need to press it into place to activate the mastic adhesion, which comes in hand for hard to reach areas or for flex ducting that won’t handle the pressure from a squeegee. Nashua’s foil mastic sealant tape is tougher, stronger, and feels like it’s going to make a permanent seal, even if the ductwork flexes. Hardcast manufacturers water, spray applied and solvent based adhesives used for attaching fiberglass insulation to metal ductwork. Read what I wrote: "Foil-Grip 1402 consists of 12 mils of butyl adhesive (similar to the adhesive used in some flexible window flashings) with a 2-mil aluminum-foil top layer. Silver Aluminum General Purpose Rolled Duct Sealing Tape Starting at $24.43 Hardcast Foil-Grip™ 1402 3 in. Foil Tape 3381 General Purpose HVAC Tape 1.88-in x 150-ft. Model #3381. Regular “duct tape” is typically a sticky mess that doesn’t seal well, and degrades. Hardcast Foil-Grip 1402 Mastic Duct Sealant 2" x 100' Foil-grip 1402 is a pressure sensitive, 40-year cycle, duct joint and general purpose rolled sealant It provides an instant water resistant grip to most surfaces including sheet metal, duct board, flex board, PVC coated duct, and duct wrap vapor Barriers Compare; Find My Store. The Foil-Grip 1404-181-BFX has superior tack for instant grab strength to galvanized metal, flex duct, PVC coated pipe, and PVC coated ductwork for an immediate airtight bond. For those with flexible duct, the best flex duct tape is the Hardcast Rolled mastic foil. This roll is a mastic-tape hybrid that has instant adhesion. It’s “peel and stick”, so …