Abstract: A liquid composition is disclosed which is useful in the fabrication of concrete articles. The composition may be used to coat molds or forms into which freshly mixed concrete is poured, or it may be used as an additive to the concrete. Formed of a diesel fuel oil and rosin, the mixture is found to result in speeding up of the curing of the freshly poured concrete, water proofing of concrete, fireproofing concrete and acting as a rust inhibitor. Additionally, the mixture enables the reduction in thickness of cast sections without sacrificing strength. Also, the mixture enables freshly made concrete to be used for bonding to old concrete to obtain a very strong bond.

Abstract: A liquid composition is disclosed which is useful in the fabrication of concrete articles. The composition may be used to coat molds or forms into which freshly mixed concrete is poured, or it may be used as an additive to the concrete. Formed of a petroleum oil fraction; e.g. diesel fuel oil, and a resinous material; e.g. rosin, the mixture is found to result in speeding up of the curing of the freshly poured concrete in addition to several other benefits.