MolyBoost is an additive for outdoor furnaces that enhances the corrosion protection properties of 1650XL Inhibitor Plus. MolyBoost is added at a rate of 1 oz. per 10 gallons of system water. 1650XL Inhibitor Plus must be used on all central boiler furnaces. Molyboost must be used in conjunction with the 1650XL inhibitor plus on all stainless steel furnace models. Molyboost can be added with inhibitor plus for added protection on all other non stainless steel models.