Epoxy 220 adhesive. Similar to Epoxy 330, but is a transparent amber color and is slightly stronger. Sets in 1 hour; cures in 8-10 hours. One-year shelf life. Excellent for jewelry repair. High tensile strength. Resists thermal shock. Cures as quickly as 30 minutes under a heat lamp. Surfaces to be bonded are best cleaned with acetone. Each box contains two 0.5 ounce tubes of epoxy.