artificial board.
Add according to the recommended ratio, the range of hydrophobicity: 99.7% - 99.9%.
Recommended Ratio
* 0.1% - 0.5% of rock wool dry weight
* Glass wool dry weight 0.2% - 0.6%
* Expanded perlite dry weight 0.3% - 1.0%
* Ceramsite dry weight 0.2% - 0.5%
It can be diluted with water at any ratio according to the hydrophobic requirements of specific products.