Kemper Systems now offers GreatSeal  PE-150, a high-performance, single-component, multi-purpose joint sealant designed for long-lasting weathertight seals.Ideal for sealing joints in roofing, walls and masonry, as well as gaps around penetrations, flashings, windows and doors, it adheres on damp surfaces. Based on a polyether sealant, GreatSeal PE-150 contains no solvents and very low VOCs. The multi-purpose indoor/outdoor sealant exhibits a service range of 200 degrees Fahrenheit to minus 40 degrees Fahrenheit, movement capability of +/- 25 percent and zero shrinkage. It can be applied in cold weather, and in most cases, without a primer. It bonds aggressively to most building materials including wood, vinyl, glass, fiberglass, foam insulation, asphalt, modified bitumen, EPDM, PVC, PIB rubber, Kynar coatings as well as painted, galvanized and anodized metals.