Can the Earlex Sprayer spray the Original Black Waterproof Sealant? The Earlex is not heavy duty enough to spray the Original Black Liquid Rubber Waterproof Sealant. It has the consistency of a pudding. If you want to spray it, you'll need something heavy duty that can spray about 3000 psi like this Lemmer HP-9500. Related articles How come it feels tacky? Is it cured? How long does Liquid Rubber Waterproof Sealant take to cure? Use in Concrete Cistern for Bathing? Can any of your products be used to cover a pond lining? What should I use to clean up? Comments 0 comments Please sign in to leave a comment.