To Use With Clay Litter: Simply pour enough Arm & Hammer Cat Litter Deodorizer to completely cover the bottom of the litter pan before adding litter. Then add cat litter as usual. To Use With Scoopable Litter: Pour on top of cat litter and mix in. For added protection between litter changes, sprinkle on top of any litter (scoopable or clay) to prevent odor even longer.
Always refer to the actual package for the most accurate information