Frost King Fiberglass Pipe Insulation Kit. This is a simple and effective way to insulate pipes of all diameters. Ideal for overwrapping electric heat cables and used to prevent water pipes freezing. Kit comes with 25-Feet plastic vapor barrier 1.6 R-Value package covers 34-Feet of 1/2-Inch pipe 24-Feet of 3/4-Inch pipe or 20-Feet of 1-Inch pipe. 6-Inch x 1/2-Inch x 25-Feet roll for either hot or cold water pipes. Frost King Fiberglass Pipe Insulation Kit. This is a simple and effective way to insulate pipes of all diameters. Ideal for overwrapping electric heat cables and used to prevent water pipes freezing. Kit comes with 25-Feet plastic vapor barrier 1.6 R-Value package covers 34-Feet of 1/2-Inch pipe 24-Feet of 3/4-Inch pipe or 20-Feet of 1-Inch pipe. 6-Inch x 1/2-Inch x 25-Feet roll for either hot or cold water pipes.