Answer
Store sandpaper flat, dry, sealed, and separated by grit. Keep coarse grit away from fine sheets.
Why it happens
Moisture, heat, and poor storage can deform sheets or affect backing flatness.
Recommended grit
Store sheets flat, dry, and sealed when possible.
Wet or dry
Storage guidance applies before both wet and dry use.
Success check
The sheet stays flat, clean, and easy to use.
What to do
- Keep unused sheets flat.
- Store them in a dry place.
- Keep grits separated so coarse grit does not contaminate fine sheets.
- Reseal packaging after opening.
Avoid: Do not store sandpaper in damp areas or under heavy uneven weight.