A quick visit to wikipedia gives me this lovely paragraph which makes me nervous:

The other main property of this unstable compound is it’s oxidizing power, although most experimental reactions have been conducted near -100 °C (173 K). Several experiments with the compound resulted in a series of fires and explosions. Some of the compounds that produced violent reactions with O₂F₂ include ethyl alcohol, methane, ammonia, and even water ice.

Flourine is really scary stuff. If we’re going to toss some FOOF at the concrete, we could also use ClF₃. Clorine Triflouride is another angry oxidizer that I’m pretty sure is hypergolic with sand of all things.