Dry Up is a standard coarse grade of diatomite. Dry Up's open and unique structure gives it sponge-like properties, which makes Dry Up Diatomite capable of absorbing both water and oil spills. 1 x 20kg bag of Dry Up will absorb approximately 24L of water or approximately 18L of Oil. Dry Up Diatomite is a chemically inert, non-combustible material which is insoluble in both water and oil. Because of its light weight, open pore structure and large volume, Dry Up provides substantially higher absorbency than most other spill absorbents.