SB 2115 Heritage Restoration Cleaner is a safer alternative to the use of traditional restoration cleaners. The buffered acid in SB 2115 substantially reduces the possibility of discoloration or burning of the masonry surface. SB 2115 Heritage Restoration Cleaner has been used to remove light to moderate atmospheric soiling and is a satisfactory cleaner for some heavily soiled surfaces. SB 2115 should not be used on concrete, marble or limestone masonry. When properly tested, SB 2115 is a safer alternative to ha