Use in Concrete Cistern for Bathing?

Use the Geo-Textile or Liquid Rubber Seam Tape to bridge joints, cracks....

Then apply approx 3-4 heavy coats of Original Black Liquid Rubber Waterproof Sealant.

Final coverage is approx 15 sq ft per G.

You can re-coat when it's dry to touch.

After final coat, allow to cure 5-7 days.

Then fill, let sit for 24-48 hrs and wash out.