Stir the petrolatum into the solvent until it is partially dissolved and the remainder is in the form of a fine suspension. Store in a steel drum. Shake before removing a portion from the drum for transfer to a dip tank. This agent may be applied either by dipping or by spraying. It will give 6 months of protection for storage under normal conditions. If the treated article is wrapped in paper, the protection may be good for 2 years.