It is not advisable to use any of our Chem-Dip immersion cleaners inside a fuel tank.  Instead, we recommend soaking with B-12 Chemtool Fuel Injector Cleaner (part #s 0101, 0105 & 0116). https://www.berrymanproducts.com/products/gasoline/b-12-chemtool-carburetor-fuel-system-and-injector-cleaner/ Here is the link to the VOC compliant carburetor cleaner https://www.berrymanproducts.com/products/cleaning-degreasing/b-12-chemtool-carburetor-choke-and-throttle-body-cleaner-voc-compliant/ Due to French labeling requirements, we do not ship directly into Canada. You would probably have to order our products online... Thanks!