Marine & Hull Shield

Substrates Protected

Problems Solved


Data Sheet & MSDS


  • All Under Water Non-ferrous Metals Underwater running gear:
    • Propellers,
    • Rudders
    • Shafts
    • Struts
    • Trim Tabs
    • Brightwork
  • All Ferrous Metal Hulls
  • Painted Steel Hulls
  • Concrete
  • Concrete Ponds
  • Pipes
  • Tanks
  • Holding Ponds

Superior resistance to:

  • Corrosion
  • Cavitation
  • Marine Growth
  • Reduces Drag
  • Environmental Damage
  • Grasses
  • Barnacles
  • Mussels

Marine & Hull Shield


Sentry Marine & Hull Shield is a thin 2 part, clear, and extremely smooth pesticide and heavy metal-free coating of quartz that inhibits the growth of most marine grasses, barnacles, and mussels from metal ship and boat hulls to provide better fuel economy and reduced cleanings.


Works on all ferrous metal hulls, and non-ferrous metal underwater running gear, such as propellers, rudders, shafts, struts and trim tabs. Sentry Marine & Hull Shield is also a very effective coating for concrete ponds, pipes, and tanks to help prevent liquid seepage through the pores of the concrete.


It can reduce the drag in moving liquids through pipe lines, thus reducing energy costs. It also inhibits the ability of most marine growth from attaching itself to the surfaces.


NOTE:  Not for use on wood hull boats.



Tough, durable, environmentally sound and free of carcinogens


In ASTM Taber Abrasive test D-3363 Sentry scored 39.11. It scored 70-75 on the Rockwell Scale and 7-7.5 on the Mohs Scale. A diamond is 100 on the Rockwell Scale and 10 on the Mohs.


With less than 100g/L VOCs it outperforms the most stringent air-quality controls in the US. Sentry also measures as being carcinogen free as defined by California Prop 65.


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Authorized Distributor Florida

Phone: 407-917-7722