YELLOTOOLS surface testing pen, perfect for advanced vehicle wrapping professionals.
 
This pen is the ideal test prior to any vehicle wrapping and PPF paint protection film application, this pen gives a good indication to the installer of the surface being wrapped.
 
Simply draw a line on the required surface, if the ink pools like droplets and runs off cleaning is
required and a retest is needed before installation. If the ink holds together in a consistent run with no droplets then the surface is ready for installation.