Not for use on skin.
This water based polyurethane coating can be used as a stretch coating for most plastics, synthetic rubber, latex, flexible polyurethane foams, and polyurethane elastomers. When brushed or sprayed, FrightProps Secret Blood Formula will air dry quickly to form a soft, stretchy elastomeric coating.
Yes, this product works well on latex masks, dries completely, and has stretch to it.
No, you need to use a silicone based product with a silicone mask. A product such as Smooth-On Psycho Paint® works well.