American Rockwool, Inc.
Mineral wool from steel slag with 75% recycled content. Inert and nonflammable. Now a part of ThermaFiber LLC.

Roxul, Inc.
Mineral wool from volcanic rock and recycled steel slag. Available in batt and board forms. Natural insect resistant. Does not degrade in UV light.

ThermaFiber LLC.
Loose-fill rock wool with 50% to 70% recycled content. Non-combustible, non-corrosive and will not absorb moisture. Does not settle, rot, decay or break down. Vermin proof.

USG Interiors
Mineral wool blown-in. Made from metallurgical slag and basalt. At least 50% post industrial recycled slag. No chemical additives. Naturally fire resistant. USG assists tornado and disaster areas to help rebuild communities.