Designed with an ultra-dry spray package to deliver a dry mist spray. This spray will not penetrate into moving mold parts, including ejector pin holes, slides cams, etc. this special feature prevents marking of plastic parts when molds are put back in service where normally a conventional rust preventive may leach out of mold crevices and reject parts. Protects up to two years under normal conditions. Mold Shield Md is best used on hot molds before condensation has occurred. Apply evenly to all surfaces requiring protection- spray distances: 8 to 10 inches. For long term protection, apply two coat, allowing a short drying time between coats.