After years of research, we have developed a revolutionary new formula that prevents graphite from smearing or staining: Our SAFEBUILD® L40 shielding paint is equally suitable for room and building shielding and for technical applications. SAFEBUILD® L40 is finely pigmented and forms a hard, abrasion-resistant film that does not graphitize or smear. Universal adhesion on almost all substrates. Up to 90 dB at 40 GHz. TÜV-SÜD certification in progress!