Sorry in advance about the Zombie, but the younger of my boys was in ICU from late Jan to mid Feb, so I only just remembered to come back to include this info:
I spoke to the local Sika rep about the 212 outside of Canada and inside of Canada minimum gap issue. It turns out that while the mix design is nearly the same, the maximum aggregate size is 8mm in Canada and 3mm basically everywhere else. It has to do with what they can get for a good price and is done to keep the price down on the Sika 212. Given the basic recommendation/rule of thum of S>=3*Max Aggregate, we get 25mm for the Canadian product.
Now we know, and I feel better again about my faith in Sika.