ROADWARE 10 MINUTE CONCRETE MENDER™
|Buildings marked for demolition in Christchurch, New Zealand.
Recently, our Roadware distributor in New Zealand requested a list of best practices for using Roadware 10 Minute Concrete Mender™. Contractors in Christchurch are using Concrete Mender to repair many meters of cracks following recent earthquakes.
Keep cartridges in original foil bag and store in
an upright position.
Store on a cool dry place between 10-28 degrees
C (50 – 80 F). If cartridges are allowed to freeze below – 10 C (14 F) some material separation
can occur. Return material to 25 C (75 F)
and shake or mix to re-blend before use.
Handle with care. Punctures to the bag can cause
moisture contamination. Rough handling can cause cartridge cracking and
Ship in upright orientation in original shipping
Read and follow illustrated instructions.
Use gloves and safety glasses. Concrete Mender is very thin and can
splash back if applied erratically.
Make sure the flow-restrictor and mixer seat
Use a new flow-restrictor and mixer every time.
Small cracks less than 2mm should be cut open to
5mm for best results. The 5mm cut
will form a, “well” for the product to accumulate as it soaks down into the
crack and will reduce material spreading on the surface away from the repair
Once material is flowing from the mixer, keep the
tip pointed down. Use the thumb
release on the gun to stop the flow.
Discharge the material from the cartridge
firmly. Working too slowly can
cause poor mixing.
Always apply a coating of Concrete Mender into the crack or spall before adding sand. This will give you better penetration and bonding.
When applying with sand, make sure the sand and
repair area are completely saturated with Concrete Mender.
10. Use a shop vacuum or compressed air to remove as much dust and contaminates from the
11. If you suspect there is water on the bottom of the crack that you cannot remove, repair the bottom half first and allow it to cure (turn grey) before repairing the top half.
12. When working at below 0 degrees C, use a propane torch or similar method to remove any surface frost from the concrete before applying the material. Keep Concrete Mender and sand at room temperature before use.
13. Needle tip mixers are great for better control and pinpoint application. They also can easily clog up when left filled with mixed product. Do not try and force a mixer or tip to clear by adding more force to the gun. You can blow out the rear seals and cause a mess. Get a new mixer or tip and start over.
|Concrete Mender™ is injected into cracked walls in Christchurch, New Zealand.