The natural degradation of the colour due to weathering, UV exposure, and possibly mechanical stresses (pedestrian or car traffic), will cause a gradual whitening of the marking, until it disappears completely after several months To erase these markings more quickly, one can use a tracer whose colour is close to the support (or surface) like our grey or black PROMARKER. If the user wishes to apply a marking for a short period (a few weeks or only 1 or 2 months), we recommend the use of our temporary construction site markers: Tempo Marker, Tempo TP (+ Mercalin TS).