Carplan muffler repair compound is designed to repair holes or cracks in mufflers and seal joints. It allows car owners to quickly and easily repair holes or cracks in mufflers. Carplan muffler paste is made of durable epoxy resin, which bonds to metal with heat and forms a durable, exhaust-tight seal. If necessary, use Carplan muffler tape to seal the hole more securely after applying the muffler repair compound.