You gotta try this stuff!!! 

AMSOIL Heavy-Duty Metal Protector (AMH) has been reformulated to provide improved performance as a corrosion inhibitor.

Call 800579-0580 to get your can on order!

MPHD is an easy-to-use, spray-on product that effectively protects metal surfaces that are exposed to the damaging effects of salt, moisture or chemical corrosion. It is ideal for steel, iron, aluminum, brass, copper and other metal surfaces exposed to water, dirt or road salt.

  • Protects metal from the effects of water, salt and humidity
  • Excellent long-term protection against corrosion
  • Displaces water and prolongs equipment life
  • Leaves a dry, long-lasting, wax-like film
  • Resists dirt
  • Sprays into hard-to-reach places

Quick-Drying, Long-Lasting Formula

The new Heavy-Duty Metal Protector formula provides a dry time of two hours, and a total cure is reached at 12 hours. Depending on the application, how it’s used and the operating environment, protection can last up to several years.

What About Lubrication?

MPHD still provides some lubricating properties, but its primary focus is corrosion protection. We know many customers use MPHD as a chain lube. We recommend converting them to AMSOIL Chain Lube (ACL).


Automotive and trailer undercoat, spare tire carriers, battery terminals, tailgate hinges, handheld tools, snow plows, mower decks and blades, snowblowers, skid-steer attachments, farm machinery, fork lifts, metal gates/ fences and much more.

Price Adjustment

With the improved performance of the formula, pricing has increased. Even with the price adjustment, both wholesale and suggested retail prices are very competitive in the corrosion inhibitor market.

Data Bulletin

The updated AMSOIL HeavyDuty Metal Protector data bulletin (G1136) covers the product’s features and benefits.


We tested MPHD’s corrosion-prevention properties on both aluminum and steel. The three aluminum pieces in the upper left were treated with MPHD on their lower halves, while the three aluminum pieces in the upper right were untreated. The three steel pieces in the lower left were treated with MPHD on their lower halves, while the three steel pieces in the lower right were untreated. Following treatment, the pieces were placed in a 5 percent saltwater bath for one hour, removed and allowed to dry for 23 hours. This process was repeated for two weeks. As seen in the pictures, the portions treated with MPHD show no signs of corrosion.

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