Rust Check was founded in 1973 in Toronto Canada and is now a proud member of the Dominion Sure Seal group Of Companies. Rust Check, since 1973 rapidly became the largest dealer network of rust proofing companies in Canada. **** To book an appointment at our Thornhill location please call 905-889-9885 OR visit us at 50 Doncaster Ave. L3T 1L4 **** more... See more text