An ideal high performance, high build coating for any service or structure, marine or industrial, where water or corrosion resistance is required. Has excellent proven long-term service case histories for marine hull externals, above & below water, and as a lining for hydro penstocks, gates, and similar permanently immersed structures. Carboguard 640 is the barrier coating of choice under Sea~Barrier® 1000 and 3000 antifoulings.