Ultra Construction corr Bond is used as an epoxy bonding agent which is used for new to old concrete. Like I said before, this polymer bonding agent can be used within 20 days. If our joint is 28 days old then we use polymer bonding agent SBR but if the joint is older than 28 days then for old to new concrete whether it is 10 years old or 20 years old, we recommend ultra corr Bond. Ultra corr bond is an epoxy based product and it is composed of two components. After cleaning the surface carefully, mix part A in part B and apply with the help of brush on the specific area. After applying on the joints if there is winter season then let it be in the take free position for 1 hour and then add concrete on it and if it's summer then give it 15 to 20 minutes until it maintains that free position. If it's the summer season then you can add concrete after applying corr bond for 15 to 20 minutes. Ultra corr bond eliminates concrete joints completely and it's one of our best products.