Sika Retarder® N is used to retard the setting time of the concrete to allow concreting under conditions of high ambient temperatures and placing of mass concrete. It is designed to be used for pumped, prestressed and structural concrete.

• Minimises the risk of cold joints.
• After the initial retardation, the rate of hardening proceeds at a rate equivalent to, or greater than, un-retarded normal concrete.
• Delivery of concrete can be made over long distances from the premix concrete plant