ASTM D4400

ASTM D4400 – Standard Test Method for Sag Resistance of Paints Using a Multinotch Applicator

Description:

Significance and Use

4.1 Evaluation of sag resistance is essential in quality control for both producers and purchasers of coatings. Practical application tests are poor in reproducibility, while viscometric methods, for example Test Methods D2196, are time-consuming and lack the convincing aspect of actual sagging. This method provides simple and rapid tests, whereby sag resistance is demonstrated by a visible sag pattern, and is rated objectively in terms of numerical values that correlate with brushout test observations.

Scope

1.1 This test method covers the laboratory determination of the sag resistance of aqueous and nonaqueous liquid coatings at any level of sag resistance.

FIG. 1 Diagram of the Medium Range Anti-Sag Meter

FIG. 2 Medium Range Anti-Sag Meter

1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

Note 1: Because the only manufacturer of the applicator know to the committee manufactures to inch-pound units, inch-pound units will be regarded as the standard when referring to the applicator.