Brew Floors Crack Repair Putty is a 2 part (1:1 mix ratio) epoxy putty that you mix together to fill all types of cracks, including vertical surfaces. Goes on like ‘spackle’, but five times stronger than concrete, and has 4 times the bonding power to concrete vs. mortar type crack repairs. Can fill cracks up to 3/16″ deep and several inches wide without the use of aggregate. Simply scoop out equal parts, mix on a piece of cardboard until evenly mixed, then apply with putty knife or trowel. Can be painted over IMMEDIATELY, even if not cured! Coverage is 500 lineal feet of 1/8″ x 1/8″ size cracks for the qt size kit, 2,000 lineal feet for the 2 gal kit. Less coverage for larger cracks. Gray color only. You can paint epoxy right over it!