Hardman Double Bubble Yellow Machinable Epoxy 5 Packs (#04002) Machineable Epoxy, 25 minute set time excellent for machineable tooling and/or body-patching adhesive Unique double packs are clean and easy to use, with very little left-over waste 3-year shelf life means epoxy will not harden on the shelf! No-shrink epoxy can be sanded, drilled, tapped, and excellent for gap-filling