By box unit

PAK Detector is a spray paint that makes identifying the presence of tar in road surfaces easy by detecting the PAH (polycyclic aromatic hydrocarbons) compounds. Road and highway maintenance requires work to be carried out to the various road surface layers.

More details

Data sheet

PackagingBox of 12 cans
Volume500 ml
Product typeTechnical product
Application domainRoads, earthworks, pipes, construction..., Security, Worksite security
Application surfaceConcrete, Bitumens, Gravels


More info

Certain asphalts containing tar and those laid back in the ‘80s and ’90s contain compounds that are today prohibited as they can cause health problems for those who handle or are in contact with them.

It is therefore important to know whether these are present when maintenance has to be carried out, in order to isolate them from other waste. This identification can be carried out by detecting the PAH strongly present in the tar.




Properties of the Pak Spray

  • PAK Detector is a white marking paint that contains a specific solvent to dissolve the PAH, causing a color change to yellow.
  • The PAK Spray can allow you to identify the presence of PAH in tar at levels of 100 ppm and above.
  • It does not provide an official measurement but merely an indication of the presence of tar in the asphalt.
  • Drying time: approximately 15 min.
  • Temperature range: -10°C to 50°C.


Specifications of the Tar Detector


Composition of the Pak Sray

Binder: acrylic.
Pigments: mineral and organic.
Solvents: specific to dissolve the PAH.
Propellant: specific blend of isobutane and propane.


Recommendations for use

  • Use head down.
  • BEFORE use: shake thoriughly.
  • AFTER use: purge head up.
  • Spray a thin layer onto the surface to be treated. Leave to dry. If PAH are present, the white surface will become yellow/brown. In the event of doubt, using a UV lamp will reveal the presence of PAH through a yellow-green colouration.


Health and safety

Safety data sheets are available free of charge on the internet:
CLP labelling with two pictograms.

picto inflammablepicto dangereux