WS 1825 S Crack 4 Black Magnetic Particles for NDT Crack Detection: is a spray to be applied on ferritic welded parts to find a discontinuity in the magnetic field and thus find the crack in the part.

WS 1826 S Crack 5 Contrast Lacquer for NDT Crack Detection: is a contrast lacquer that is applied on a dark surface turning it into white so that there is a higher contrast when applying the product WS 1825 S Crack 4 Black Magnetic Particles