Marine Nano Shop Liquid Crystal Armour Pro — same marine ceramic family as DIY, tighter flash window. For a detailer, or a boat owner on a confident second coat. Not the first-coat bottle. Clear 9H nano-crystalline coating. TiO2 and SiO2 in a low-VOC carrier, made to move into gelcoat pores. Gelcoat, paint, glass, vinyl, metal, plastic. 12–18 months when maintained. 1-year limited guarantee. If you want maximum build and already know Pro, that is Pro HD. If this is your first hull, start with DIY or a Marine Nano Shop kit. DIY vs Pro vs Pro HD DIY Pro Pro HD Who Boat owner, first coat Detailer, or a confident second coat Highest-build, less flexible, max longevity Feel Most forgiving flash Tighter window Tightest window — best in shade; two-person on big panels Durability (maintained) 12–18 months 12–18 months 18–24 months Start here unless you coat boats for a living you want HD you have already used Pro A 20 ft hull wants a Marine Nano Shop kit, not three extra bottles and a guess. 50 ml is a cowling, tender, or jet ski — not a center-console. You will also need A polisher, primer, prep, and towels. Restoration kits on this site pack the stack. Extra machines: Marine Detail Supply. Shade. Tighter window than DIY — do not coat in sun. 24 hours of dry weather after the coat. Wash care and the 1-year limited guarantee: Marine Nano Shop handbook. Ships from Fort Myers, Florida. See our shipping policy. Questions: 844-522-6266. New to the Coat path? See our guide at Coat — and when you need them, Restore · Maintain.