Chipboard is available in a number of densities: 

P1 - Standard Grade

P2 - Furniture Grade

P3 - Moisture Resistant

P4 - Flooring Grade

P5 - Moisture Resistant

P6 - Heavy Duty

 All grades of chipboard except the high-density variety tend to soak up water. Once it is water logged, chipboard tends to swell and breakdown.

Please use Personal Protection Equipment when using/ cutting this product.