D-70 - Met-L-Chek Developer, 10.5 oz Spray Can

D-70 finds wide use in weld inspection in ship building and weld repairs. It is used in heat exchanger inspection in what is called the through leak method where penetrant is applied to one side and the D-70 to the other. After a prescribed penetration time the developer coating is inspected for penetrant indications which highlight a through leak.