The horticultural form of DE works against critters only when it remains dry. Further, it's used against soft-bodied critters.

I don't know anything about NAPA Super Absorbent 'oil-dry' diatomaceous earth. Perhaps someone else will add their comment(s).

The last "oil dry" I bought from NAPA was made of ground up and pelletized corn cobs. I've not seen any made of Diamotaceous Earth.

I found the answer from this link posted in the Container forum (below).

From the article: "Bryan goes on to say "the murky water that is left after one initially rinses the diatomaceous earth (NAPA Super Absorbent) for the first time is actually a mechanical pesticide. I spray the liquid on my trees if they get aphids and the aphids are gone the next day. The sharp microscopic edges of the Diatoms cut through the exoskeleton of the insect causing them to dry out and die."

Here is a link that might be useful: Cat Litter as Bonsai Soil

I've used food-grade d.e. for years but am not familiar with the product you mention. Could you contact the brand/ manufacturer for answers to your question?

When using diatomaceous earth as a pesticide, keep in mind that it kills not only pests but also beneficial insects, such as honey bees.