Factory Finish Adherence test on Metal Roof

This is an adherence test carried out on a metal roof that had been cleaned in advance of Liquasil's Metalseal 20 being applied. A sub-contractor insisted that they had removed all the unsuitable substrate that could be removed with a 4000psi jet wash fitted with a turbo lance (which strips just about everything). We take nothing for granted, so went and conducted our own post-cleaning adherence tests. Result = re-do the cleaning.