Is ProActiv sunscreen sweatproof?

I have a job that usually requires me to work outside some of the time, and I got sunburned once so after that I started using ProActiv sunscreen, and it works pretty well. However, while working outside, especially on hot, humid days like today was and tomorrow will be (maybe less humid), I sweat a lot, and I keep wondering if my sunscreen is coming off, especially when I wipe my face. So, does anyone know if ProActiv's sunscreen is sweatproof (at least as much as it can be, since no suncreen is 100%)?