The performance of Unistrut’s Perma-Green III far exceeds that of conventional finishes.
And compared to competitive “high-performance” coatings, Perma-Green III provides superior resistance to chalking,
checking and fading and is far less vulnerable to common acidic atmospheres, solvents and alkalis. Just as important,
Perma-Green III is the result of an environmentally neutral process that virtually eliminates the toxic metals commonly
found in competitive paint-based finishes.
Unistrut Perma-Green III is a
factory applied, electro-deposition acrylic coating with superior rust protection and fade-resistance. The acrylic coating is
a proprietary formulation and is essentially “heavy-metal” free. The electrodeposition coating process provides
a smooth, hard, durable surface which is completely cured. This inhibits introduction of airborne contaminates which can
adversely affect sensitive manufacturing environments.
Before the electrodeposition acrylic coating is applied, Unistrut channel is thoroughly cleaned and coated with an
zinc phosphate conversion coating. Unistrut’s unique, custom-designed “prep” process consists of ten separate steps,
the most thorough in the industry. The cleaning, phosphating and electrodeposition coating processes are continuous and,
unlike “batch” processing, result in a uniform quality coating.
Production samples are tested on a continuous basis for corrosion resistance. Unistrut Perma-Green III exceeds 400 hours salt
spray (1/8" creep from scribe) when tested to ASTM B117. Unscribed samples exceed 600 hours salt spray. (6% red rust)