This International Standard describes test methods for evaluating the sag resistance (resistance to sagging) ofpaints, varnishes and similar coating materials (coatings) when applied to a substrate and held in a verticalposition.
Evaluation of the sag resistance can be carried out after the coating has been applied as follows:
a) using a sag index applicator on a horizontally placed test panel which is afterwards put into a verticalposition, or
b) using a spray gun for application on a substrate in a vertical position.
NOTE Brush or roller application can also be used provided that an even coating is applied.
This International Standard is applicable to liquid coatings only.