Proton Pink Stencil Primer - 8 oz TubeProton Professional Tattoo Stencil Primer arose in Medellin (Colombia) by a group of artists trying to improve what already exists seeing that the tattoo templates were erased from their skin, resulting in Proton Professional Stencil Primer, the strongest Stencil ever created and tested in thousands of skins, with a unique formulation and a duration of more than 15 hours on the skin. Last 15 hours. GUARANTEED. It does not peel or expand the Stencil.