Sticks Too - Fastwood Epoxy Putty Working Life: 15 minutes @75 degrees F (24 degrees C) Shelf Stability: 1 year minimum @75 degrees F (24 degrees C) Temperature Limitations: 250 degrees F (121degrees C) Shore Hardness 75 after 90 minutes Tensile Strength: 6,000 psi  Shrinkage: Less than 1%