What happens next in this paragraph?

How to clean hydraulic fluid from asphalt
Cover the area with cat box litter.
Cat litter is made to be ultra-absorbent, and it can soak up a lot of the hydraulic fluid, drawing it out of the asphalt. This works best on a fresh spill, but it can be an effective first step at treating hydraulic fluid which has soaked in, as well.
If you prefer, you can use another absorbent material, like sawdust or granulated clay. Use a push broom to spread the litter over the stain.