Ruscoe #2 Self-Leveling Sealant is recommended for sealing openings greater than 1/8-inch. It can be used as an effective sealant against water, chemicals, air and dirt on wood or metal doors and windows, metal buildings, mobile home
roofs and bodies, truck trailer roofs and bodies, HVAC ducting, concrete, ceramic, brick, metal, stone, masonry, marble and glass. Ruscoe #2 Self-Leveling Sealant is recommended for sealing horizontal seams only: it is self leveling