SpecChem > Products > Repair Mortars > Pro Plug 45

Pro Plug 45

Rapid setting cement based hydraulic cement

Pro Plug 45 is a hydraulic cement that sets three times faster than standard quick-set plugs, achieving an instant set in just 45 seconds. This rapid set allows Pro Plug 45 to bond both mechanically and chemically to saturated surfaces, ideal for:

  • Stopping streaming leaks in concrete and masonry
  • Anchoring bolts and rods
  • Sealing cracks as well as floor and wall junctions
  • Non-metallic and non-rusting
  • Fast-setting and expands as it sets
  • Waterproof and resistant to hydrostatic pressure
  • Easy to mix and use
  • Chloride and metal-free mortar that can be shaped to the desired contour

Tech Sheet
Safety Sheet


Substrate Preparation: Undercut or widen holes and cracks to at least 0.75 inches to allow for material embedment. Remove all loose dirt and aggregate. Ensure surfaces are saturated surface dry (SSD) before application.

Mixing: Combine Pro Plug 45 with clean, potable water to achieve a putty-like consistency. The recommended mixing ratio is 3 parts powder to 1 part water. Mix only small quantities due to the rapid setting time.

Application Method:

  • Stopping Water: Start at the top of the crack, applying Pro Plug 45 firmly with a trowel or by hand, maintaining pressure for about 3 minutes to prevent the material from washing out under water pressure.
  • Sealing Cracks and Floor/Wall Junctions: Push Pro Plug 45 into the crack or hole to form a cove at the junction.
  • Anchoring Bolts or Rods: Drill or chisel a hole with at least ½ inch of space around the bolt or rod. Place the bolt, fill around it with Pro Plug 45 using a pointed trowel, and support the bolt until the material sets and is stable.

Application Notes

  • Review complete technical datasheets for detailed application guidelines.
  • Apply immediately after mixing and do not use in moving cracks or as a surface coating.
  • Pre-wet substrate and maintain it moist for at least 15 minutes after application.


  • Available in 50 lb pails

Shelf Life

  • 12 months when stored properly in a cool, dry place, sealed away from direct sunlight.

Test Data

  • Compressive Strength (ASTM C109):
    • 4 hours: 2000 psi
    • 1 day: 4000 psi
    • 28 days: 5500 psi