Product description fosroc concure a99 wb white is water based acrylic curing compound which conforms to as3799. It is ideal for curing concrete and cement renders where aftertrades such as painting with acrylic paints is likely typical applications application to freshly laid concrete including renders structural and mass concrete indoors and outdoors advantages water retention efficiency of 90%. Complies to as3799, 1998 water based and environmentally friendly eliminates the demand for damp hessian, Sand or polythene sheeting rapid film formation will not yellow in sunlight economical seals concrete surfaces accepts most after trade complies with as4020 2018 designed for application in contact with drinking water