My name is Jeroen van der Knijff. Since 1998 I have been active in the Dutch maritime sector, with a special interest in repairing damage to polyester vessels, plastic, and composite objects.
SPECIALIZATION AND EXPERIENCE
Since 1998, I have increasingly specialized in damage repair, initially mainly on-site and later also in my own workshop for larger projects. My expertise includes fiberglass, carbon fiber and composite materials. In the early years of my career, I learned about building carbon sandwich constructions and using vacuum and infusion techniques. Among other things, I have worked in the high-end windsurfing industry and with Nacra Sailing on the foiling Nacra17, the current Olympic catamaran.
From 2002 to around 2021, I worked intensively with the importer of Corsair Marine Benelux (Jan de Boer Catamarans), gaining extensive experience with models such as the F24, F27, F28, and F31. During this period, I assembled dozens of new boats and repaired countless damages, both structurally and cosmetically.
Over the past 10 years, I have further specialized in gelcoat repairs — the outer layer of a boat that is difficult to repair and colour match, but can in most cases be invisibly restored thanks to my experience.
A NEW CHAPTER IN SPAIN
In 2026, I started a new chapter in the Valencia region of Spain. The expertise built up over decades in the Netherlands is now fully available here — not only for boats and marine applications, but also for swimming pool repair. Cracked concrete, leaking skimmers, damaged gelcoat or waterproofing issues: the same materials, the same techniques, the same quality.
With Fiberfix.es, I am ready to help customers throughout the Valencia region and beyond with all their fiberglass, composite and pool repair needs.
Jeroen van der Knijff
+34 6 624 08 317 (SPAIN)
+31 6 512 84 735 (NETHERLANDS)
FIBERFIXES@GMAIL.COM
POLYESTERHERSTEL@GMAIL.COM