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Hard-On™ Permanent hard coating for truck frames and equipment.

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Your Price: $84.50
Part Number: wwho
Feature: 115

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Looking for a permanent 1-time hard shell coating for your truck frame or equipment?  Hard-On by woolwax™ is what you need. Originally developed as a chip guard for trailer trucks this formula is perfect for any long term applications.  Hard-On is water based , so it has almost no smell. Dries to the touch in about 1 hour, and after 72 hours it is fully cured.  

Hard-On by woolwax™ is an excellent solution for high wash areas such as wheel wells.


Spray Guns-  Hard-On by woolwax™ is a relatively low viscosity water-based coating and can be applied with almost any undercoating gun. 

Woolwax Hard-On is a high performance, permanent 1-time hard shell coating. NOT rubber. For those people that want a "1 time"  application, as opposed to an annual maintenance products, Hard-On is a great choice.  If you decide to go with Hard-On permanent coating, you will also need a cavity wax for the enclosed protected areas. We highly recommend Creep N' Crawl Cavity wax. This can be found at the the link here:  Creep N' Crawl

Hard-On can easily be sprayed or painted on the surface.

Please read instructions carefully


·        This coating dries to a pure black. This is NOT a rubber coating. This dries to a very hard coating.

·        Drying time is 60 minutes to the touch, and 72 hours to be fully cured.

·        Expected life expectancy is 5-10 years depending on vehicle use.

·        Do not apply a soft non-drying coating (woolwax) on top of this product, as it may cause it to soften.   If after several years it needs touch-up, use the Hard-On product on top of the original coating.  

·        Do not apply over a soft coating (woolwax, FF, oil, etc.)

·        The surface does not need to be pristine. Hard-On™ is developed to be applied on used, slightly rusted, oily, or imperfect surfaces.

·        This product can freeze. Always store above 50 degrees.

·        Ideal temperature to apply is 50-90 degrees F.

·        Recommended dry thickness: 6 mils.  Coverage: 60+/- sf /gallon

·        Do not thin Hard-On. Must be applied at full strength.

·        This coating is not intended to be removed (be certain that you want a permanent coating).

·        Wipe off any overspray immediately with damp cloth before it begins to dry.

·        Keep unused product securely closed to keep air out.  

·        In addition to corrosion preventive, Hard-On is also a chip guard.

·        Incredible durable protection from salt, rust, moisture, and road debris.

·        Acts as a sound and vibration deadener.

·        Ideal product for very long-term vehicle protection as well as trailers, RV’s, school buses, motor homes, truck box trailers, delivery trucks, and more. 

** Hard-On by woolwax™ is not high-heat resistant. Typically undercoating formulas primary function is as a corrosion inhibiting agent. Developing a coating that is also high-heat resistant is not an option due to the cost being to high to sell to the majority of undercoating users. It is very costly to make it high-heat resistant.

     Hard-On by woolwax™ will burn off at 140° F and should not be applied to tailpipes, mufflers, engine blocks, etc. A typical heat resistant coating will tolerate 800 - 1000°F.

     If you are not sure that you want a permanent (cannot be removed) coating, please contact us for more information.  Once applied, there are no do-overs.  Please consider this carefully. 


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