Owatrol Marine Oil

Limited Special Offer - Free Delivery on Owatrol Products!

At A Glance...

  • Deeply penetrating rust inhibitor
  • Pushes out moisture and air from within, stabilising rust and preventing it from returning
  • Paint conditioner which improves paint flow and eliminates brush marks
  • Improves adhesion of oil-based paints and prevents peeling
  • Improves coverage and uniformity of paint,up to 25% more
  • Eases application of finishes in difficult conditions
  • Sale
  • Regular price £15.27
Shipping calculated at checkout.


Marine Oil is deeply saturating, versatile air-drying oil. It can be simply used alone, added to oil-based paint as a conditioner, for wood impregnation or to aid adhesion of finishes.

For use as a rust inhibitor

When using as a rust inhibitor, Marine Oil penetrates deep into the surface pushing out any excess moisture or air. Doing this to rusted metal will stabilise it and stop any further rust from forming. Marine Oil’s unique formula creates a strong yet flexible finish that will not peel or flake.

If you are wanting to use Marine Oil on brand new metal surfaces, we would instead recommend you use anti-corrosive primer AP60.

For use as a paint conditioner

If being used as a paint conditioner and being added to any alkyd or oil-based coating, Marine Oil will improve the paint flow making it easier to work with, increasing the wet edge time and offering greater adhesion of the paint. Other damaging thinners will not be able to maintain the colour, appearance or overall quality that Marine Oil does.

N.B – If you are using a water-based paint but wish to gain the same effect, please instead use Owatrol Floetrol. Floetrol paint conditioner is formulated to be used in any water-based paint, whereas Marine Oil is to be used in any oil-based paint.

For use in wood impregnation

When being used for wood impregnation, Marine Oil deeply saturates into dry wood, protecting it from the damaging effects of moisture. Doing this will help prevent paint from peeling from the wood and also protect any latches or hinges from corrosion.

For advanced adhesion

Marine Oil will leave a bonding film the surface, maintaining the natural look yet allowing for enhanced adhesion. This makes it suitable for use as a foundation for finishing coats or primers. Marine Oil offers premium adhesion to surfaces such as aluminium, galvanised steel, wood, zinc and more! Application of Marine Oil creates a base for which paint can be directly applied to even firm rust and is also heat resistant to 175°C

Ideal Uses for Marine Oil

  • Preventing further damage in heavily rusted surfaces on hulls and tanks
  • Priming galvanised metals eliminating the need for weathering or pickling
  • Improving the flow of paint and its work-ability
  • Preventing paint from peeling from wooden surfaces
  • Protecting steel structures such as railings, engine parts, pipes, stairs etc
  • Assuring better adhesion of finishes
  • Surface Preparation

    Surface preparation when using Marine Oil as a rust inhibitor

    First, surfaces must be clean, dry and free from oil, grease and other surface contaminants. Remove all scale; loose and flaking rust and old paint back to a sound surface and edge and feather in any sharp edges. Surfaces exposed to chemicals (acids, alkali or salt deposits) should be washed using copious amounts of water or steam cleaned. Severely contaminated surfaces should be cleaned using an appropriate solvent.

    Do not remove firm rust or clean the metal back to a bright finish.

    Surface preparation when using Marine Oil as a paint conditioner

    First prepare the surface as per the instructions on your paint can. In addition, if not asked to, ensure that you remove all loose and flaking material and treat any organic growth with fungicidal solution or a mix of 1 part water to 1 part chlorine bleach (allow bleach solution to sit for 15 minutes), rinse thoroughly and allow to dry.

    Applying Marine Oil as a Rust Inhibitor

    Using Marine Oil on new clean steel

    First prime new steel with a mix of 1 part Marine Oil to 3 parts primer. Then follow with normal paint system adding Marine Oil to subsequent coats as directed under ‘Mixing instructions’ below.

    Using Marine Oil on lightly rusted surfaces

    First prime the surface with a mix of 1 part Marine Oil to 2 parts primer. Then follow with normal paint system adding Marine Oil to subsequent coats as directed under ‘Mixing instructions’ below.

    Using Marine Oil on new unpainted rusty steel

    First prime the surface with a mix of 1 part Marine Oil to 1 part Primer. Then follow with normal paint system adding Marine Oil to subsequent coats as directed under ‘Mixing instructions’ below.

    Using Marine Oil on old, severely rusted or previously coated surfaces

    First, apply wet on wet applications of Marine Oil to all exposed rust until fully saturated and allow it to dry. Saturation is indicated by a uniform glossy appearance to the surface when Marine Oil is dry. Before Marine Oil has hardened, check the surfaces and remove rust scale and old paint loosened by the above. If needed, touch up these areas. Allow to dry. Next, apply a mix of 1 part Marine Oil to 2 parts primer and allow to dry. Then follow with normal paint system adding Marine Oil to subsequent coats as directed under ‘Mixing instructions’ below.

    Note: Marine Oil will not lift well-bonded paint.

    Applying Marine Oil as a Paint Conditioner

    First, apply paint in normal the manner. If the paint is sticky, drags, sets up to fast or does not level properly add Marine Oil (stirring in well) until the paint works smoothly, easily and evenly. Allow the brush, roller or sprayer to be your guide.

    Using Marine Oil as a Paint Conditioner for wood surfaces in sound condition

    First prime any bare wood with a mix of 1 part Marine Oil to 2 parts primer and allow to dry. Follow with normal paint system adding Marine Oil as in ‘Mixing Instructions’ below.

    Using Marine Oil as a Paint Conditioner on damaged, soft or punky wood surfaces

    First apply 2 to 4 liberal applications of Marine Oil wet on wet, as fast as the wood will absorb it. Do not allow Marine Oil to dry between applications. When the wood cannot absorb any more wipe up any excess and allow to dry overnight (12 hrs). Follow with normal paint system adding Marine Oil as in ‘Mixing Instructions’ below to ease application and aid adhesion.

    Mixing instructions

    Topcoat: As required – normally 5 %-20 % by volume.
    Undercoat: up to 30 % by volume.
    Primer: up to 50 % by volume.

    The above is meant as a guide only. Conditions of application, the porosity of surface etc. will dictate the amount of Owatrol Oil to be mixed into the paint.

    Clean Up

    Clean all tools and equipment with white spirits while still wet. If allowed to dry, remove with paint stripper. Store and maintain equipment as directed by the manufacturer.

    NOTE: Any rags, steel wool etc soaked in Marine Oil may spontaneously catch fire if improperly discarded. Rags, steel wool etc must be saturated with water after use or placed in a sealed, water-filled metal container, before disposing with household waste.


    Do not mix or overcoat Marine Oil with paints containing hot solvents i.e. Xylene, 2 part coatings, chlorinated rubber etc. – for these type of paints use Owatrol CIP instead. Do not use Marine Oil as a paint conditioner in water-based paints, for this purpose use Floetrol instead – Owatrol’s water-based paint conditioner.

    Things to Remember

    • Cover everything you do not wish to paint.
    • Apply between + 5°C and + 35°C.
    • Do not apply in direct sunlight or on to hot surfaces.
    • Test for compatibility when adding Marine Oil to paint.