We used to make this stuff from gasoline and styrofoam that was like silly putty in some regards, but was highly flammable.
We called it “blob materiel”
No one was ever hurt, some eyebrows were singed...
We put together something like that when we were kids. That damn stuff burned for something like 2 days! Water just seemed to make it mad. lol
Ha. What you called “blob materiel” is also known as napalm!
I hear you get some spectacular results when you mix some powdered aluminum and iron oxide (thermite) with silly putty.