Radcon® Formula #7 is a sodium silicate impregnation sealant used to make concrete watertight, sealing large cracks and pores. The sodium silicate reacts with calcium ions in the concrete to form a calcium silicate hydrate gel. The reaction will harden the surface of the concrete, preventing the ingress of water. Radcon® Formula #7 is modified so it won’t dry out, providing autogenous healing capabilities of hairline cracking and long lasting durability backed up by a 100 year warranty. Radcon® Formula #7 is spray applied to cured concrete, followed by a 3 day watering process that allows the formula to penetrate the surface of the concrete. There are no maintenance requirements to provide continuously watertight protection for the life of the concrete. Applications include all structural concrete, car parks, rooftops, bridge decks, potable water holding vessels, and commercial and residential bathrooms. It is certified by various international standards safe for use with potable water vessels.