It is rheology controlled to give excellent atomisation with a fogging attachment, particularly with low pressure systems, and has excellent seam penetration with negligible sag and run. Rust Proof is a heavy duty corrosion preventative coating formulated to comply with AS2662, Part 1 - 1983 - Corrosion Inhibition (Rust Proofing) - Motor Vehicles. Note: This product is NOT a rust converter. Do not use this product as an undercoat for paint. Rust Proof is not recommended on exposed areas such as the underbody or wheel arches because the film could become damaged, preventing complete protection.Available in 350g, 1L, 4L, and 20L.