Mapelastic SRS is a seamless rubber membrane formulated for sewage and manhole rehabilitation environments. The product is ideal for waterproofing and protecting concrete subject to hydrogen sulfide gas corrosion by completely bridging and sealing cracks. Spray-applied by trained installers, LEED-compliant Mapelastic SRS is solvent-free and odorless, making it suitable for confined areas. Mapei. 800-426-2734.