Anti-Sag Meter

Coat­ings applied on non-hor­i­zon­tal sur­faces will sag due to grav­ity. Sag resis­tance is a fac­tor of the com­po­si­tion and vis­cos­ity of the coat­ing, as well as the applied thick­ness. The Anti-Sag meter allows quan­ti­fi­ca­tion of the sag­ging prop­er­ties of coat­ings.

• Quick test of the sag­ging of coat­ings on non-hor­i­zon­tal sur­faces
• Avai­l­able in most coat­ing thick­ness ranges

The appli­ca­tor is a U-shaped draw­down bar with a series of 1/4 inch (6.4 mm) wide notches of vary­ing clear­ances, spaced 1/16 inch (1.6 mm) apart. It is 5 inches (127 mm) wide and pro­duces a total film width of 3 3/8 inches (86 mm). When a draw­down is made, a series of par­al­lel stripes of dif­fer­ent wet film thick­ness will be formed. This panel is placed on a ver­ti­cal sur­face with the stripes hor­i­zon­tal and the thick­est stripe low­est. As the film stripes sag down­ward, some of the uncoated 1/16 inch (1.6 mm) spaces may become entirely cov­ered. The clear­ance of the gap that pro­duces the thick­est film stripe, not sag­ging com­pletely to the stripe below, is the anti-sag index of the coat­ing.

For more infor­ma­tions on test charts,
please see page 151.