Bonds old concrete to new. Perfect for concrete patching, resurfacing, and leveling. Just add concrete bonding additive to any cementatious dry mix to maximize adhesion and durability. Suggested use on repairing cracks in steps, walks, driveways and patios, tuck pointing old mortar joints of brick and concrete, resurfacing and leveling of old concrete slabs and walls. Locks in moisture to allow super-strength curing of concrete, stops moisture suction into old concrete. Can be added to most dry mix repair products or used as a primer. Interior/exterior use. Color: Translucent.