What type of sealant is best suited for pipes at elevated temperatures and allows for movement?

Silicone sealant is particularly well-suited for applications involving pipes at elevated temperatures due to its excellent thermal stability and resistance to high temperatures. It remains flexible over a wide temperature range, making it ideal for joints and gaps where movement can occur. This flexibility allows the sealant to absorb thermal expansion and contraction that can happen with heated pipes, ensuring a tight seal that doesn't compromise its performance.

Additionally, silicone sealant offers good adhesion to various substrates, including metal, plastic, and glass, which is vital for maintaining an effective firestop system. Its resilience against aging and environmental exposure further enhances its suitability for long-term applications in challenging conditions.

In contrast, other types of sealants, such as polyurethane, latex, and acrylic, may not perform as well under high-temperature conditions or may be less flexible, making them less ideal for scenarios where thermal movement is expected.