Re: Cistern lining
You want to use a material that cures, not one that dries. A curing plaster or cement is waterproof; a drying "plaster" (i.e., premix drywall joint compound) will dissolve in water.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.