Mapeair VR (formerly known as Polychem VR) is a ready-to-use air-entraining agent in an aqueous solution of
neutralized vinsol resin. Mapeair VR meets or exceeds the requirements of ASTM C260, CRD 13 and AASHTO
M154.
Adding air to the concrete (air entrainment) allows the concrete to withstand freezing and thawing cycles as it provides room for the water present in concrete to expand without putting stresses on the concrete itself.