What we recommend is:
- Clean surface, Acetone works as a good final cleaner.
- Bridge joints and seams with Liquid Rubber Seam Tape.
- Build your thickness with Liquid Rubber Waterproof Sealant. Final coverage is approx 15 sq ft per G
- Allow to cure 5-7 days after final coating to cure fully.
- If you have the ability to cycle (fill and drain) a couple times, that helps as well.