ISO 2812-5: 2018 specifies a method for evaluating the resistance of coating materials (including single-layer and multi-layer coatings) under the influence of different liquids or pasty substances using a temperature layer oven. The method simulates real-world environmental conditions through layer temperature changes, tests the liquid resistance of coatings at different temperatures, and is particularly suitable for evaluating the protective effect of coatings on substrates. The new version of the standard has made technical revisions in terms of adding test terms, modifying equipment descriptions, and clarifying evaluation procedures to ensure the accuracy and conformity of test results. This standard is widely applicable to quality control and Product Research & Development in the Coatings industry.