Are your products Certified for Potable Water We do not have a Potable Water Certification. Related articles I hope to build a concrete reflection pool 60 feet long, 4 feet wide, 4" deep build the base first; then the walls. Can I use Liquid Rubber to render the pond reliably waterproof? What if I see blisters? Can I seam 2 pieces of epdm (rubber pond liner) with the Liquid Rubber Seam Tape? Comments 0 comments Article is closed for comments.