Recommend Rhino 1380 be used between 65° – 85°F (product and ambient temperatures). Use below 45°F requires special hardener selection, consult with Rhino sales personnel for low temperature recommendations. Remove all surface contaminates such as water, dirt, rust, and petroleum products. Mold surfaces must be waxed or otherwise “released” prior to epoxy application. All Rhino curing agents are compatible with Rhino 1380 so proportion resin and hardener in accordance with the selected Rhino hardener. Mix resin and hardener for 3 – 5 minutes being certain to scrape the bottom and sides of the mixing container. Mix no material than may be applied before the expiration of the pot life.