 Should I seal my work first? In many cases, you don't need to use a sealant before applying art resin. However, there are some situations where it does make a lot of sense. For example, if you're resigning over paper, you would want to use a sealant to prevent the resin from absorbing into the paper, causing some darkness and some wet-looking spots. Secondly, if you are working over loose material, such as chalk pastel or glitter, a sealant would tack down that material so that when you pour the resin over top, it doesn't float away with the liquid resin. And lastly, if you're using organic material like wood or inkjet prints, anything that has the opportunity to degas into the art resin, you would want to presale that first to avoid having a bubble issue. So do a test before you start, and if in doubt, it never hurts to use a presale first.