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Perma-Guard Fossil Shell Flour


DIATOMACEOUS EARTH is NOT registered with the EPA as an insecticide.

Our 4.4 lb bag is registered as an insecticide.

SKU: 199 Category:



Diatomaceous earth ( /ˌd.ətəˌmʃəs ˈɜːrθ/) – also known as D.E., diatomite, or kieselgur/kieselguhr – is a naturally occurring, soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder. It has a particle size ranging from less than 3 μm to more than 1 mm, but typically 10 to 200 μm. Depending on the granularity, this powder can have an abrasive feel, similar to pumice powder, and has a low density as a result of its high porosity. The typical chemical composition of oven-dried diatomaceous earth is 80–90% silica, with 2–4% alumina (attributed mostly to clay minerals) and 0.5–2% iron oxide.[1]

Diatomaceous earth consists of fossilized remains of diatoms, a type of hard-shelled protist (chrysophytes).

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4.4 lb bag, 50# bag


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