Got a hole in your exhaust? Carplan Exhaust Assembly Paste provides a gas tight seal when assembling exhaust sections. It can also be used to fill small holes and leaks. Remains flexible on assembly and cures at normal operating temperatures. Must not be used before the catalytic converter in the exhaust system. The CarPlan Exhaust Repair Range is a complete solution for repairing large holes, cracks & splits on all car exhausts. The range is quick & easy to use with no need to dismantle the exhaust, leaving a permanent gas tight repair.