Uses Space Age technology to insulate against heat, cold and noise. This 4-foot x 6-foot sheet is made of 3/8" sound deadening fiber padding. Highly reflective aluminum is bonded on one side to achieve 97% reflection of radiant heat. Works great under the hood, under your carpet or rubber mat, above headliners, behind door panels, on the firewall and behind the seat. This Multi-Purpose Insulation has numerous household uses. Save on your gas and electric bills by insulating your water heater, pipes, garage doors and attic. Use this Multi-Purpose Insulation wherever heat reflection or sound deadening is needed. Order yours today! Use Spray Adhesive or Aluminum Tape and Super Adhesive to easily install Insulation Material.