JS500 is a leach and seal process applied onto a conventional zinc plated
and passivated coating. This increases the corrosion resistance up to 500 hours, several times that of an unsealed passivate. JS500 is therefore a very
cost effective way of achieving a higher level of corrosion resistance.

JS500 can be applied to a trivalent passivate giving the benefit of achieving
a high level of corrosion resistance while meeting the End of Life Vehicle
directive which bans the use of hexavalent coating systems.

One of the largest users of JS500 is the automotive industry who have
included it in many of their specifications.

These include:

To ensure that this coating system is delivered to a consistently high quality only approved applicators
are accredited by the manufactures of JS500. E.C. Williams is one of these registered appllicators.

An ultra violet tracer is included in the coating to enable the end user to verify its conformance.

An optional integral lubricant can be added within the JS500 coating. The purpose of this is to decrease
the coefficient of friction on the coated parts thus controlling the tension obtainable within a given torque without the need for a conventional liquid lubricant.