Red Devil Inc 646 Concrete Mortar Repair Caulk 10.1 Oz

Product Description

The RED DEVIL INC 646 is a gray, 10.1 oz concrete and mortar repair caulk designed for patching and sealing cracks in masonry surfaces. It delivers a textured finish that blends with surrounding mortar for a cleaner, more uniform appearance after repair. The formula cleans up with water, making it a practical choice for field use. This product is applied by trade professionals and skilled DIYers working on concrete flatwork, brick, stone, and block structures requiring surface restoration.

This caulk is suited for residential and light commercial masonry repair applications. Typical uses include patching cracks in concrete steps, sidewalks, driveways, and retaining walls, as well as repointing or repairing mortar joints between brick, stone, and cinder block. The gray color and textured surface profile make it well-matched to standard portland-based mortar and concrete finishes commonly found in existing construction.

Key Features

• 10.1 oz cartridge — standard size for use with a caulking gun
• Gray color with textured finish that blends with existing mortar and concrete
• Suitable for patching cracks in steps, sidewalks, and masonry joints
• Compatible with brick, stone, and cinder block substrates
• Water cleanup — no solvent required

Compatibility

Designed for use on common masonry substrates including concrete, brick, stone, and cinder block. Intended for patching cracks in steps and sidewalks and repairing mortar joints in exterior masonry assemblies.

Installation Notes

Surface preparation is critical — remove loose material, dust, and debris from the crack or joint before application. Apply using a standard caulking gun and smooth the bead to match the surrounding texture before the product skins over. Follow all applicable building codes and manufacturer cure time guidance before exposing the repair to foot traffic or moisture. Clean tools and hands with water immediately after use.

Technical Specifications

• Net Volume: 10.1 oz
• Color: Gray
• Finish: Textured
• Cleanup: Water
• Package Weight: 13.7 pounds
• Unit of Measure: Each
• Package Quantity: 12

Standard Information

• Brand: RED DEVIL INC
• Manufacturer Part Number: 646