We're using a radiant heating system in concrete. This will be in our barn/shop that we'll live in while we build our home. We'd rather not install other flooring over the concrete -- not only to save money, but also to ensure it doesn't get damaged when it's a shop. Is the concrete too caustic to use as flooring? We'll be putting our rugs and furniture directly on it and I wouldn't want to ruin them due to ignorance. Perhaps a certain sealer? We were thinking of using a colored concrete.