Looks terrific, but Interlux say for above the waterline. "Use Toplac anywhere above the true waterline when long lasting performance and ease of application are desired." <A HREF="http://www.yachtpaint.com/usa//product_guide/finishes_undercoats/US_toplac.asp?ComponentID=9851&SourcePageID=6660#1" target="_blank">http://www.yachtpaint.com/usa//product_guide/finishes_undercoats/US_toplac.asp?ComponentID=9851&...</A>