Replacement Sponge (New-Style Rectangle M-1 Sponge)

Completely updated, the 3rd edition includes instructions on the step-by-step use of 50 instruments and test kits for measuring ambient conditions (including electronic psychrometers), surface profile (including two digital depth micrometers and a new procedure for use of replica tape), SSPC visual guides, wet and dry film thickness, concrete testing, destructive coating thickness measurement, adhesion, holiday/pinhole detection and coating hardness. An updated list of surface cleanliness standards, an updated index of industry standards, and a new surface salt extraction and analysis procedure are also included.