4354 Thinner 4 is a slow-drying thinner for use with MG Chemicals’ urethane and acrylic conformal products. This thinner has excellent solvent strength, making it a good oil and grease remover. It has very low water solubility, so it is unlikely to absorb water and create a blush. Its drying rate is slow enough to promote excellent leveling, yet fast enough to accommodate a reasonable assembly line speed, making it a good choice for spray application.