When sandblasting painted concrete inside a building what precautions and equipment do you recommend?
Motion detectors are commercially available for a few dollars. They are setup to detect a large warm moving object, which includes humans, but also some other objects. .
2 part resin is a chemical reaction and does not dry via air. Most resin epoxy is ready to handle in 30 minutes with the insides continuing to harden for another 1-3 hours depending on how thick it is. If its been 24 hours and it has still not hardened, the problem is most likely your mix ratio. Check the mixture for air bubbles or white foam skin on it, this could be a tell tail sign of a bad mix.
An air duster helps epoxy resin dry faster, same with super glue Also, heat makes it longer to dry. I live in washington, and it dries in 3 min.
