The original post: /r/diy by /u/blusay on 2024-11-11 09:36:04.

Small bag of cement, 5kg, using 10%, a year later it’s all wasted, not hardening. Even when kept in a carefully closed bag.

I’d like to take steps to preserve small quantities of cement to keep it handy when small needs arises (and not waste most of it each time, it’s ridiculous).

I thought of buying a new fresh bag and right away (after taking what I need) divide it in small portions for long term storage. It shouldn’t be wasted if properly sealed.

What shall I use?

Edit:

In the end I transferred the rest of my 2.5kg bag in a couple of glass jars with metal lid (recycling food container, free). I was sealing a new power outlet box in a wall, outdoor, and I barely needed 300g (200 in the wall, plus waste and curing sample to check).

Edit2: I want to have some at home in case I need a little for some repair. I know it’s cheap but my time driving and shopping and back is worth more (plus the work postponed).