Pro-Seal 34 is a single component, non-sag elastoplastic, M34 Polycarbonate/Polycarbon sealant material, which may be applied to any surface material even through water and oil. Stops leaks immediately and seals on contact. It will stick and remain stuck, never getting hard or brittle. It remains flexible with up to 1200% elongation and has no memory which allows it to absorb movement, vibration or expansion.