SpecPlug Fast-Setting Hydraulic-Cement Mortar

SpecPlug is a fast-setting hydraulic-cement mortar that instantly stops water flow through holes and cracks in concrete and masonry

SpecPlug is a single-component, add-water mortar that expands as it sets to form a strong, watertight bond without shrinking or oxidizing. It's suitable for both vertical and underwater applications and is certified to NSF/ANSI Standard 61 for potable water contact.

Key Features & Benefits

• Single-component — just add water
• Sets in approximately 3-5 minutes, rapidly stopping flowing water
• Expands to form a strong, watertight bond to the substrate
• Suitable for vertical and underwater applications
• Certified to NSF/ANSI Standard 61 for potable water contact
• A faster-setting formula is available as Super SpecPlug

Application Instructions

• Enlarge cracks to at least 3/4" in width and depth, cut square or undercut
• Remove all grease, wax, oil, contaminants, curing compounds, and weak or deteriorated concrete
• Saturate the repair area with water
• Mix to a putty-like consistency, aiming for a 20-21% water-to-product ratio by weight
• Mix only what can be placed within 2 minutes
• For vertical or moving-water applications, hold firmly in place until set (about 3 minutes)
• Use hot water/warm material in cold conditions and cold water in hot conditions to manage set time
• Keep damp for at least 30 minutes; wet curing for up to 2 days achieves optimal strength

Technical Data Summary

• Shelf Life: 18 months in unopened containers, stored between 45°F and 90°F

Packaging

Available in 10 lb and 50 lb pails.

Supporting Documents

Safety Data Sheet (SDS)

Technical Data Sheet (TDS)