The difference between flushing & back-flushing rad

[Coelacanth]

I'd love to buy the product, because everyone swears by it...but I'm not going to pay over $30 shipped (CAD) for an 8-oz. bottle, that's ridiculous. Chemicals like that don't cross the border cost-effectively anymore due to recent changes to importation rules. Hell, you can't even ship lacquer-based aerosol paints without paying a premium these days.

 

[Heskahoka]

Shipping two bottles (16 oz) from Phoenix (Nick at ArizonaGN) to Canada would be roughly $20 USD or less using USPS, UPS or Fedex.

https://shipgooder.com/resultrate.h...ges=1&length=8&width=5&height=2&residential=y

In addition, take a look at the MSDS sheet of it:
http://msdsreport.com/ds.cfm?msds=B...ING SYSTEM TREATMENT&mfg=RADIATOR MASTERS INC
It is non-toxic, non-flammable and about as dangerous as dish detergent.

Based upon the Canadian Post website, it would not be considered a hazardous/dangerous good:
https://www.canadapost.ca/tools/pg/manual/PGnonmail-e.asp#1378311

Approx $40 total for many years of coolant system protection as well as supporting a board vendor strikes me as a pretty fair deal.

Hope this helps.