A sack of marble granules is nearly indestructible; the chemical beside it is not. Most stock loss in this trade comes from binder and coating containers stored badly, and most colour-matching complaints come from lot records nobody kept. Both are solved with habits, not equipment.
Storing granules
Stone does not spoil. What ruins dana is contamination and mixing:
- Off the floor on pallets, away from damp walls — wet granules clump and dry unevenly
- Bags closed; grit, dust and cement carry into a mix and print themselves on a wall
- Lots kept separate and labelled. Two lots of the same shade blended into one job is how a wall gets tonal bands (mistake two)
Storing chemicals
- Sealed containers, always. Part-used tins with a poorly seated lid skin over and are wasted
- Cool and shaded. Godown roofs in an Indian summer reach temperatures that shorten the life of anything under them
- Never frozen in cold-region stores, and never in standing water
- Upright, undamaged containers — a dented drum is a leak in waiting
- Follow the product's own shelf life and storage guidance printed on the container; it is specific to the formulation and takes precedence over any general rule here
Transport
Secure loads so containers do not rub or puncture; keep chemicals out of direct sun on long hauls; keep granule bags away from anything that leaks. Damage in transit usually shows as a stained pallet, not an obvious break — inspect on arrival and photograph anything suspect before signing.
Stock habits that pay
- First in, first out. Date-mark stock as it lands; sell the older lot first.
- Record the lot against the job. The repair enquiry two years later is where this pays (matching a patch).
- Keep a reserve for a live job rather than selling the last bag of that lot to someone else.
- Check part-used stock monthly — a skinned tin found now is an inventory note; found on site it is a lost day.
Frequently asked questions
How long does marble dana keep?
The stone itself, indefinitely if kept dry and clean. The binder and coatings are the dated items — read their containers.
Can granules be re-dried if they get damp?
Lightly damp bags dried thoroughly can often be used; clumped or contaminated material is not worth the risk on a customer's elevation.
What should I ask a supplier about shelf life?
Manufacture date and stated shelf life, in writing on the invoice. Ours are on the containers — ask through the B2B page.