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Sunday, 15 September 2019
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Raw materials & technologies

High-build polyaspartic urethane makes one-coat protection possible

Friday, 19 July 2013

The versatilely applicable product replaces the two-coat application over a zinc-rich primer and offers high abrasion and corrosion resistance.

The high-build polyaspartic urethane is suitable for e.g. bridges 

Source: Zhenya Kovalyov / Fotolia

The high-build polyaspartic urethane is suitable for e.g. bridges 

Source: Zhenya Kovalyov / Fotolia

Sherwin-Williams has introduced a high-build, one-coat polyaspartic urethane designed to accelerate return to service on bridges and other infrastructure projects. "Envirolastic 980 PA” is a spray-applied, aliphatic polyaspartic polyurea that can be applied as an aliphatic abrasion-resistant topcoat for polyurea and epoxy or alone over properly prepared concrete, steel or wood.

High-build urethane replaces two-coat application

The high-build formulation eliminates the need for a two-coat application over a zinc-rich primer, the company says.

"The protective coatings industry is always challenged to keep not only its own deadlines on steel bridge and other civil infrastructure projects, but also to assure that the entire chain meets or exceeds finish product expectations,” says Dee McNeill, of Sherwin-Williams Protective & Marine Coatings.

Curing in low or humid temperatures

The product offers abrasion and corrosion resistance and high-gloss retention. Up to 228,6 microns dry film thickness is possible in one pass, the company says. The product can cure in low or humid temperatures and dries to touch in 30 minutes. When applied at 25 °C, the substrate can be returned to service in two hours.

Versatile applications

Applications include bridge coatings, industrial equipment, rail cars and processing area floors and walls. The coating is also suitable for use on sports facilities and other structures.

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