Heatbath Corp. has expanded its line of rust preventative products with the introduction of Durawax, a multi-purpose synthetic wax emulsion that provides coverage over bare steel or conversion coatings including black oxide and phosphates. Durawax forms a hard, shiny dry film that enhances surface appearance and durability. Applied over black oxide at 50% by volume, it delivers more than 400 hr of corrosion protection when subject to 100% relative humidity. It can also be used as a dry film lubricant for torque reduction and other purposes. According to the company, it is an excellent emulsion for weatherproofing of military implements.