Mortar Repair is a water- resistant acrylic formula that remains relatively flexible. It is textured and colored to give the appearance of masonry mortar. The product has minimal shrinkage, excellent adhesion and is non-flammable. The unique square opening is ideal for filling 3/8 in. mortar joints. Repairs damaged mortar joints Sanded acrylic formula Blends with surrounding mortar Ready-to-use formula Covers approx. 12 lineal feet Recommended to repair block joints Gray Finish Lift your mortar with fine strength by using this Quikrete Mortar Repair Sealant.