Elcometer 135C Bresle Test Patches measure the level of soluble salts on uncoated surfaces in accordance with ISO 8502-6.Unlike traditional patches, the Elcometer 135C Bresle Test Patches are easy to peel off after test, leaving no foam on the substrate, so there is no need to scrape or reblast the residue prior to coating. They are available with a Certificate of Cleanliness & Test Area in accordance with ISO 8502-6. Their foam walls are 19 percent thicker than those of traditional patches, making it much easier to insert the needle. They offer a water-tight seal thanks to the quality of adhesive used, and they are available in packs of 25 and 100 www.elcometer.com