Solvent Rub Resistance Tester

The BGD 521 Solvent Rub Resistance Tester is designed in accordance with ASTM D 4752 and NCCA 11-18 (Test Method for Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent Rub). The Solvent Rub Test is typically conducted using methyl ethyl ketone (MEK) as the solvent. The MEK resistance, or degree of cure, is applicable to both paint topcoats and primers. ASTM D4752 entails rubbing the surface of a baked film with cheesecloth soaked in MEK until the film fails or breaks through. The type of cheesecloth, stroke distance, stroke rate, and approximate applied pressure of the rub are specified. The rubs are counted as a double rub, where one rub forward and one rub backward constitute a double rub.