VITCAS 30 ml Heat Resistant Black Rope Sealant - Easy Application - Securing Thermal Rope - Ceramic Fiber Seal - Easily sets - Up to 1000 degree Celsius. Vitcas Rope Seal Adhesive is a high-temperature adhesive that withstands very high temperatures and is used to secure thermal rope/tape and ceramic fiber seal to the oven, stove, and boiler doors.