Your One-Stop Sign and Print Shop ABOUT US The Sure Sign Company is well-established and respected sign shop located in Sarnia, Ontario, Canada. GALLERY Check out some of our latest work and our broad range of offered services. FACEBOOK Follow us on Facebook to keep up on our latest projects, specials and some great, creative inspiration. SEND A FILE Do you need to send us a file that is just too big to email? Try our quick and easy FTP.