Length/ Type

Beam

Product Needed

 Skis, kayaks, boards, wind
 surfers, lures, etc.
    8’-10’ PWC
  13'-16’ Hull
  17’-23’ Hull
  23'-28’ Hull

n/a
3'
 5' - 6’
 6’ - 8’
 6' - 8’

1.5 oz. can covers approx. 20 sq. ft.
3.5 oz. can covers approx. 50 sq. ft.
7 oz. can covers approx. 100 sq. ft.
14 oz. can covers approx. 200 sq. ft.
14 oz. can + 7 oz. covers approx. 300 sq. ft.  

To more accurately estimate how many ounces are required you must know the square footage of the hull beneath the waterline. Multiplying the length by the beam will give you that figure for shallow draft vessels. For deep-V hulls, fixed keel sailboats and such, the additional underwater surface must also be taken into account. Also account for drives, trim tabs, paddles, and the like.