National - Libality Insurance - Renting in SAE driving to whistler

If I buy the SLI Supplement Liability Insurance - from national will I be covered in Canada?

Under the help section for national it lists that SLI is not avaliable in Canada.

https://www.nationalcar.com/itemDetails.do?HelpItemID=SLI.

Or a more general question: What kind of insurance do I need to drive into canada.