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Composite Kayak Manufacturers Use Epoxy Bonding Gel-Coat Technology

  • Monday, 23rd November 2009
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  • Reading time: about 2 minutes

Hangzhou Epic Boat Co. and Nelo M.A.R. Kayaks are now using the latest polyester ‘epoxy bonding’ spray gelcoat technology from Scott Bader in their composite Kayaks.

This technology is now replacing a vinyl ester gelcoat for the hulls and decks of a variety of the company’s range of kayaks.

According to manufacturers, the result of using Crystic GC 253PA epoxy bonding gelcoat is a higher quality product with improved weathering performance and significant manufacturing productivity gains.

Previously, the vinyl ester gelcoat required both back surface preparation and a tiecoat to be applied prior to infusing the epoxy resin laminate structure; however, Crystic GC 253PA does not require either of these. Further time-savings are gained as the product is tack free in less than two hours.

A representative from Decatlo Desportos E Composites, the official composites distributor for Scott Bader in Portugal, commented on why Crystic GC 253PA was chosen by Nelo M.A.R. Kayaks, which is arguably the largest kayak manufacturer in the world: “The two most important aspects for Nelo were the outstanding adhesion to epoxy resin, which they see as ‘best in class’ and the consistent high quality of the Crystic gelcoat, with no noticeable colour variation between the epoxy bonding gelcoat batches supplied to them.”

Spray trials by both companies with Crystic GC 253PA have reportedly demonstrated it to be robust, sag resistant and easy to handle. All Crystic epoxy bonding gelcoats in the range are said to have significantly improved weathering performance compared with either a vinyl ester or epoxy gelcoat. As part of its rigorous R & D product development, Scott Bader independently tests all its gelcoats for 12 months under extreme UV resistance and durability test conditions in Florida, USA.

The Crystic Epoxy Bonding gel-coat range has brush, spray, low odour and fire retardant options. All are pre-accelerated, isophthalic gelcoats, which use a standard MEKP catalyst, designed for use in the wind energy, marine, building and transportation markets to provide a reliable, permanent bond with wet lay or prepreg epoxy resin systems.


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