A rapid room-temperature curing, two-part epoxy adhesive commonly used for filling pinholes in composites prior to painting. Can also be used for bonding metals, wood, and a variety of plastics.
We developed 3M™ Scotch-Weld™ Epoxy Adhesive EC-3501 B/A as a two-part epoxy adhesive that rapidly cures at room temperature to form a tough bond. Our thixotropic adhesive is an ideal solution for filling pinholes in composites before painting. It is also effective on metals and many plastics. It can be dispensed in duo-pak cartridges for use with the 3M™ EPX™ Applicator System for minimal waste and professional results. The mix ratio is 1:1 and the adhesive provides a 5-10 minute work life. The adhesive reaches handling strength in 90-120 minutes and is fully cured in 8 hours (at 72°F /22°C).