Selektope trial on antifouling ingredient’s hard fouling prevention power successful

Sarah Carter
Sarah Carter

30 January 2018


A twenty-four-month trial of a hull coating containing the bio-repellent active agent Selektope on a 46,067dwt chemical and products carrier has confirmed the antifouling ingredient’s hard fouling prevention power. Selektope is an organic, non-metal compound that works to prevent barnacle fouling by temporarily activating the swimming behaviour of barnacle cyprid larvae, making it impossible for them to settle on the hull. It is characterised by high efficacy at extremely low concentrations (0.1% w/w), is ultra-low leaching and offers paint manufacturers the flexibility to boost copper-based paint formulations or replace copper completely. In 2015, the vertical sides and flat bottom of Laurin Maritime’s vessel Calypso were fully coated with an antifouling coating containing Selektope® during its first five-year drydock. The vessel has spent two years in active operation across a wide range of trade routes, with more than 50% of operating time spent in biofouling hotspots with > 25oC (up to 32oC) temperatures. Laurin Maritime’s technical director Bertil Andersson says: “The vessel has now operated for two years since last dry dock, and we can conclude that the fouling of the hull (read added hull resistance) remains at a very low level and the trend continues being flat.” I-Tech CEO Philip Chaabane says: “This independent analysis of performance data and the underwater hull inspection provide convincing long-term performance results from a full-vessel application of a Selektope®-containing hull coating for a vessel with significant exposure to severe fouling conditions. The fact that the hull fouling trend continues to be flat means that our general outlook on the continuous performance of the Selektope®-containing coating is very positive. This delivers the proof required that our unique antifouling ingredient can offer ship operators guaranteed hard fouling prevention performance for any vessel activity and trading patterns.” With multiple major coatings suppliers now turning to Selektope® to enhance their products, I-Tech AB is urging ship owners to check whether the ingredient is available in all antifoulings being considered as part of the coatings selection process.