The full name is Isofan Marine SKY Clear UHS ESS&RE: a bit long, but as we know, when dealing with a product catalog as broad as Stoppani’s, the terms inevitably stack up. However, there is a simpler way to uniquely identify this new polyurethane finish: it is in fact the first bio-based clear coat developed by Lechler for the Stoppani brand.
The Isofan Marine range includes around 1500 solid colors and 800 metallic colors; within it, you can also find the ESS&RE line, which features Lechler products made with raw materials from renewable sources. It is therefore a selection of marine coating products designed for shipyards and boat owners who want to minimize the environmental impact of recreational boating, in line with the sector’s ecological transition. All of this—as will be seen below—without compromising either the technical performance or the aesthetic appearance of the proposed coating systems.

Isofan Marine SKY Clear is the latest addition to this green line: the two-component ultra-high solid (UHS) polyurethane clear coat features a bio-based content of 30% (according to the ASTM D6866 standard); a portion that is anything but given for a clear, marine-grade product required to withstand harsh sea conditions.
The sustainability of SKY Clear does not stop with the choice of bio-based components. What sets it apart from other clear topcoats is also a low VOC content (volatile organic compounds, carbon-based chemicals that evaporate into the air). Table in hand, the VOC content of the new Stoppani marine finish is only 420 g/l, whereas in the case of the Standard Clear, that value is equal to 540 g/l.
Choosing Isofan Marine SKY Clear therefore means reducing carbon dioxide emissions by up to 30%, thanks in part to the combined use of the dedicated hardener from the ESS&RE line, which is also largely bio-based (up to 44% of the raw materials used).

After all, we are still talking about a yachting finish: beyond sustainability, there are several other aspects to examine, starting with aesthetic appearance. The applied film looks full with high gloss, a wet-look effect, and excellent clarity of the reflected image.
Special attention must also be paid to the application methods. SKY Clear must be applied as a topcoat over properly dried ISOFAN basecoats, with an application that the manufacturer describes as simple and versatile. This makes it a suitable solution even for large surfaces, with fast curing.
With this new addition to the ESS&RE line, Lechler demonstrates once again how it is possible to achieve a high level of sustainability in the yachting sector without compromising results.

Isofan Marine SKY Clear is a two-component high solid polyurethane clear topcoat, formulated by Lechler to offer the yachting sector a clear and sustainable solution.
This polyurethane clear coat by Stoppani features a 30% bio-based content and low VOC content, reducing harmful emissions into the atmosphere.
SKY Clear can be applied as a topcoat over the basecoats of the ISM5 ISOFAN MARINE 2K BASECOAT and ISM6 ISOFAN MARINE 2K BASECOAT PROF series, respecting the drying times specified by Stoppani.
The topcoat with Sky Clear must be applied by pneumatic spray, using a conventional, HVLP, or airmix spray gun.
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Originally published by Yachting News.