Advanced Seasonal Innovations HSRD24R 24-inch Hot Sok Roof Deicer Refill - 2 pack
The Hot Sok is designed to prevent damage to roofs from ice dams. Place one Hot Sok on every 5 feet of the problem area and it begins to work within the hour. There are no long term adverse effects to the roof or surrounding area. Includes 2 dry Hot Sok refills.