It is a solid fertiliser enriched with magnesium, iron and potassium, and containing high concentrations of Ca and SiO₂. It enhances the post-harvest durability of fruit by ensuring that cell walls adapt well to adverse climatic conditions and sudden temperature changes, and by promoting greater hardening of the cell walls.

| Guaranteed Content | % (w/w) |
|---|---|
| CaO | 35 |
| MgO | 2 |
| SiO2 | 26 |
| K2O | 0,3 |
| Fe | 0,5 |