Speedball Screen Filler is designed to block areas of the fabric in the screen frame that should not let paint through when you screen print. Apply Screen Filler after painting your subject with Drawing Fluid. Allow your Drawing Fluid to dry for at least 20 minutes before applying Screen Filler. Shake the jar or mix the contents with a small stick, then pour the product onto your frame. Use a squeegee to spread the product over the entire frame. Allow the product to dry before making your print.