Roxul, Inc.
Mineral wool from natural basalt rock and recycled steel slag. Available in batt and board forms. Natural insect resistant. Does not degrade in UV light. Roxul invested in their own recycling facility to redirect waste back into manufacturing process, resulting in 50% water usage reductions and raw material consumption and energy usage reduction. LEED eligible.

ThermaFiber LLC
Loose-fill rock wool with 50% to 70% recycled content from iron ore slag. No asbestos or chemical additives. Non-combustible — resists temperatures up to 2000 degrees F. Non-corrosive and will not absorb moisture. Does not settle, rot, decay or break down. Vermin proof. LEED eligible.