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Fortis 519 is the ultimate uv stable polyurethane coating. A single pack, aliphatic (non-yellowing) polyurethane available in high gloss, satin or matt finish. Fortis 519 contains uv absorbers which give protection to anything below the coating that is not uv stable. It is moisture cured with extremely high solids (68%), achieving the strength of a two pack polyurethane. Fortis 519 has excellent flow and weathering properties with extremely high adhesion qualities to Concrete, Timber & Stone. It has long wet edge and low odour. Fortis 519 can be used in any application requiring a low maintenance, heavy duty, stain resistant concrete or timber floor coating. Polyurethane Flooring


  • UV Stable & contains UV absorbers
  • Aliphatic, non yellowing
  • 68% solids content
  • Extremely high adhesion
  • Pour straight from the can (no mixing)
  • More than 2 coats may be applied in 1 day
  • Available in 4ltr & 20ltr - Gloss, Matt or Satin finish
  • Low odour
  • Tyre & scuff resistant
  • Interior / Exterior




  • Never install a moisture cured polyurethane on days where the relative humidity exceeds 75%.
  • Always ensure that there is adequate ventilation to allow solvents to disperse.
  • If re-coat time exceeds 8-12 hours then sand prior to applying a subsequent coat.
  • Apply thin coats as per manufacturers recommendations.

When humidity levels exceed 75% proceed as follows:

  • Leave re-coating until the following day.
  • Throughly sand the 1st coat, then vacuum clean.
  • Wipe down the 1st coat with acetone and allow a short period to dry.
  • Wipe with a dry clean cloth & proceed with the 2nd coat.

Frequently Asked Questions

  • Question - Can Fortis 519 be used on timber?
  • Answer - Yes, Fortis 519 can be used on both concrete and timber.
  • Question - Can Fortis 519 be used over fibro cement sheeting?
  • Answer - Yes, as long as it is not pre-sealed and has some porosity to it.
  • Question - Will Fortis 519 stop other coatings underneath from yellowing?
  • Answer - Yes, Fortis 519 is UV stable and also contains UV absorbers.
  • Question - Can Fortis 519 be tinted?
  • Answer - Yes, Fortis 519 can be tinted using industrial solvent based tinters.
  • Question - Can more than one coat be applied in a day?
  • Answer - Yes, Fortis 519 can be re-coated within 4-6 hours, weather dependant.
  • Question - Do you need to sand in-between coats?
  • Answer - If a subsequent coat is applied within 8 hours then no sanding is required.
  • Question - If I miss the 8 hour re-coat window, what grit sandpaper do I use?
  • Answer - Let dry for a min of 16 hours and then use a 180 grit fine sandpaper.
  • Question - Is Fortis 519 AV Gas (aviation fuel) resistant?
  • Answer - It is resistant to a degree, however not recommended for this application.

* The above information is to be used as a guide only and Con-Treat accepts no responsibility for any consequence resulting from the advice contained herein or verbally.



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