For an economical and energy efficient way to help prevent your pipes from freezing consider using the a RMA cell Tubolit 6 ft. Polyethylene self sealing pipe wrap insulation. This insulation helps protect your copper and iron pipes against mold and condensation. The self seal system allows for a quick and easy installation.

Tubolit DGS03438 Self Seal 3/4" x 3/8" Foam Pipe Insulation - 300 Lineal Feet/Carton Polyethylene - B00FQ56PFS