What products were made with vermiculite from the mine in Libby?

Much of the Libby vermiculite was used to produce attic insulation products, often sold under the brand name Zonolite.

Vermiculite was commonly sold in gardening and hardware stores. It was used as a soil amendment (conditioner to improve soil quality), fertilizer carrier, and as an ingredient in many potting soil mixes.

Vermiculite was also used in fireproofing materials, gypsum wallboard, and as a lightweight aggregate in construction materials.