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The 3M 7100009688 is a two-part, non-sag, toughened MMA-based structural acrylic adhesive sold under the Scotch-Weld DP8405NS designation. It ships in a 45 mL cartridge and mixes at a 10:1 ratio. Work life is 5 minutes, with handling strength typically achieved in approximately 14 minutes. The green color aids visual confirmation of a complete mix. This adhesive is designed for structural bonding applications requiring impact resistance and strong adhesion to a range of substrates, including plastics and metals. It is installed by manufacturing technicians, maintenance professionals, and trade workers performing structural assembly or repair tasks.
The DP8405NS is suited for bonding plastics and metals, including substrates with slightly oily surfaces where thorough cleaning may not be fully practical. Its non-sag formulation is appropriate for vertical and overhead applications where the adhesive must hold position during the cure window. Typical applications include structural panel bonding, bracket attachment, and repair work in HVAC, electrical enclosure, and general industrial assembly environments.
Requires a 3M Scotch-Weld EPX Plus II Applicator, compatible mix nozzles, and a plunger for dispensing — these items are not included. Designed for use with the 45 mL dual-cartridge format at a 10:1 mix ratio.
Dispensing must be performed using the specified EPX Plus II Applicator with appropriate mix nozzles to ensure the correct 10:1 ratio is achieved. Surfaces should be clean and dry whenever possible; however, the adhesive is formulated to tolerate light oil contamination on metal. Work within the 5-minute open time and avoid disturbing the bond joint until handling strength is reached at approximately 14 minutes. Follow applicable safety data sheet guidelines for ventilation and personal protective equipment when working with MMA-based adhesives.
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