RECAST PLUG: Rapid-Setting Hydraulic Cement Mortar

RECAST PLUG is a durable, fast-setting hydraulic cement mortar that stops flowing water through holes and cracks in concrete and masonry surfaces. RECAST PLUG will not shrink or oxidize.

For Use In:

  • Concrete cracks and holes to stop the flow of water
  • Basement and masonry cracks
  • Below-grade foundations
  • Floor and wall joints
  • Manholes
  • Sewer pipes
  • Swimming pools
  • Tunnels


  • Single component; just add water and use
  • Expands as it sets, bonds strongly to concrete and makes watertight repairs
  • Sets in approximately 3–5 minutes, stops flowing water fast
  • Concrete gray color


  • For best results, enlarge crack to a width and depth of 3/4″ (19 mm); cut square or undercut.
  • Do not cut in a “V” shape.
  • Clean the substrate of all grease, wax, oil, contaminants, and curing compounds.
  • Remove all weak, contaminated, or deteriorated concrete.
  • Saturate the surface with water. RECAST PLUG will cure in the presence of running water.)

Add a small amount of clean water to RECAST PLUG and mix to a putty consistency. Use an approximate ratio of 20%-21% water to product (by weight). Mix only enough material that can be placed in 2 minutes: approximately 9.5 pints water to 50 lbs of product.

Apply a scrub coat of the properly mixed repair mortar by scrubbing a thin layer into the pre-dampened substrate with a stiff brush. Place the repair mortar immediately before the bond coat dries.

For vertical and moving-water applications, hold product firmly in place until it reaches final set, in approximately 3 minutes.

Temperatures below 60° F (16° C) may delay set. Use hot water and warm material to speed setting time. In temperatures above 80° F (27° C) protect the material from hot sun and use cold water to slow setting time.

RECAST PLUG cures and continues to gain strength as long as it remains damp. Keep the material damp for a minimum of 30 minutes. The product obtains optimal strength when wet cured for up to 2 days.



50 lb (22.7 kg) pails

  • One 50 lb (22.7 kg) pail yields approximately 0.43 cubic feet
  • One pound (0.45 kg) will fill 15.6 cubic inches


The data shown is typical for controlled laboratory conditions. Reasonable variation from these results can be expected due to variation in type and quantity of cement, and sand gradation of the mortar mix. When testing the field mixed material, other factors such as variations in mixing, water content, temperature and curing conditions should be considered.