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Owatrol Prima Pro

Solvent based blocking primer for masking and blocking stains

Prima pro packaging
  • Masks and blocks unknown and heavy stains
  • Use on a wide variety of interior surfaces
  • Hide stains and marks from water, nicotine, food, drink, pens and pencils etc
  • Use on all smooth surfaces eliminating the need to sand
  • Apply to very lightly rusted surfaces as an anti-corrosion primer
  • Available in 5L

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Prima Pro is a solvent based blocking primer for the masking and blocking of unknown and heavy stains.

It can be used on a wide variety of internal surfaces, as well as external surfaces if sheltered by roofing.

Why should I use Prima Pro?

Prima pro is a premium primer for use on a wide range of surfaces such as plaster, cement, brick, wood, aluminium, plastic, PVC and more. It adheres to all smooth surfaces eliminating the need to sand.

Once applied, simply leave to dry before applying a finishing coat. Prima Pro will improve the performance of the finish which will make application easier.

You can also apply Prima Pro to very lightly rusted surfaces as an anti-corrosion primer.

Ideal uses for Prima Pro

  • Block stains from damage caused by water, fire, smoke and nicotine
  • Hide stains and marks from food, drink, pens and pencils
  • Use internally on a wide variety of surfaces
  • Use underneath a finish to allow for a smoother and easier application
  • Once applied, Prima Pro prevents staining of the finish coat

Always read the Prima Pro Product Information before using and follow the instructions carefully.

Surface Preparation

Surfaces must be clean, dry and free of all dust, grease, oil, wax, excessive chalky material and other surface contamination, which may affect adhesion.

Remove all loose and flaking material back to a sound surface by sanding and scraping. Wash surface with Soapclean or other suitable cleaning agent, not washing-up detergent.

Treat and remove any mould with a suitable mould killer. Remove as much of the stain as possible by washing, sanding scraping etc.

Prime porous surfaces with Prima Pro diluted 5% with white spirit.


  • Use as is – do not thin
  • Stir well before and during use
  • Apply 1 or 2 coats of Prima Pro depending on the severity of the stain
  • Allow to dry

Clean Up

Clean all tools and equipment with white spirits while still wet. If allowed to dry, remove with paint stripper.

Things to Remember

  • Cover and protect everything you do not wish to coat
  • Apply between 5°C (41°F) and 30°C (86°F) RH <65%
  • Do not apply to hot surfaces
  • Ensure room is well ventilated


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Coverage: 10m² (107ft²) per litre per coat
Tools: Brush, Roller or Airless Sprayer
Suitable for: Interior use or exterior use under roofing
Clean up: White Spirit
Drying Time: Dry in 1 hour
Re-coat with water-based finishes 24-48 hours or oil-based finishes 12 hours
Suitable Surfaces: Plaster, cement, brick, wood, aluminium, plastic, PVC, galvanised metal and more