Chem Link NovaLink® SL F1239ST 68 oz Stone Self Leveling Joint Sealant Pouch 4 per Case. NovaLink SL is a self-leveling, moisture curing sealant, designed for application on horizontal joints in concrete construction such as driveways, sidewalks, plaza decks, balconies, stairwells, parking structures, roof decks and surrounding fountains and swimming pools. NovaLink SL cures rapidly to a solid rubber seal that can accommodate 25% joint movement. Its unique polyether cure chemistry allows NovaLink SL to be installed on damp concrete or in damp weather conditions without "outgassing" or forming CO2 bubbles, as urethane sealants often do. Its excellent self leveling properties and smooth finish allow NovaLink SL to be installed without tooling. The elimination of masking tape and tooling results in a significant reduction in labor. NovaLink SL is solvent free and will not shrink. Its excellent adhesion to clean masonry or concrete allows it to be installed without a primer in most joints smaller than 1/2 Inch wide.