If you leave a boat in water the bottom will, over time, become a biological experiment. To limit the amount of growth bottom paint manufacturers use a variety of chemicals in their products. A common additive is Irgarol made by BASF. It was recently announced that BASF will no longer offer Irgarol.
- ‘Bottom Paint Makers face Irgarol Shortage’ – from Practical Sailer
- ‘Antifouling Companies Struggle with the Loss of Herbicide Irgarol’ – from TotalBoatShow Blog
I have applied to about 1/3rd of the Sage 17s built, at owner’s request, bottom paint. Of the paints used three are affected by Irgarol being ‘discontinued’:
Sea Hawk, produces Cukote, has offered this solution –
I can find no comment about this issue from Interlux; the manufacturer of VC17 and Micro Extra.
So … if you use a bottom paint that uses Irgarol you may consider making your your bottom paint purchase for the 2015 sailing season (and for the 2016 season) ASAP.