ASTM D4541-02 pdf free.Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers. ASTM D4541 covers a procedure for evaluating the pull-off strength (commonly referred to as adhesion) of a coating system from metal substrates. Pull-off strength of coatings from concrete is described in Test Method D7234. This test offers two test protocols. Protocol 1 (test to fracture)...