1. resistant to rust; not likely to rust

1. to make resistant to rust

Examples

• The rustproof coating will protect the metal from corrosion.
• These rustproof screws are perfect for outdoor use.
• The car’s rustproof undercarriage lasted for years without damage.
• We need to rustproof the garden tools before winter.
• The manufacturer rustproofs all their steel products.
• Stainless steel is naturally rustproof in most conditions.