Is Liquid Rubber Waterproof Sealant safe for drinking water? Currently we do not have a certification allowing this use. Related articles What should I use to clean up? Are your products Certified for Potable Water What temperature can I apply Liquid Rubber Foundation Sealant? What is Liquid Rubber Seam Tape used for? What if I don't want black as my final color? Comments 0 comments Please sign in to leave a comment.