BlazeCut does have TUV certification. TUV is the European equivalent of the US UL certification. TUV is internationally recognized. It was developed in Slovakia (not Czech Republic).
I think most of us know what TUV approval is...
The Blazecut does NOT have SFI(SEMA Foundation, Inc), SCCA(Sports Car Club of America), or FIA(Federation Internationale de l'Automobile), or PCA(Porsche Club of America) approval. That tells me I don't want anything to do with it.
The other thing to look at is VOLUME. Five or ten pounds of smothering agent versus what volume is in that skinny little tube? Maybe a half liter or half quart?
That's a pint glass full of beer. Any REAL fire would just laugh at that. What's that going to accomplish? DO THE MATH.