Recent content by Peter_Frantz

I just found this Q & A on the Rust-Oleum website: Q: Can Epoxy Shield be applied over fiberglass reinforced concrete? A: Yes. Fibers should be burned with caution! Do not sand as fibers can create wicking for moisture. --Peter

Hi z29toz06, Yes, the fibers were built into the matrix of the concrete as it was poured. I assumed it was put there to increase the structural integrity, but I don't know. I also don't know what they're made of, but they're certainly synthetic and could be fiberglass I guess. Now that I'm...

Thanks for the advice. This is really helping me to sort things out. I think I'll try burning the fibers in the corner where the workbench will go. But I think it's more likely that I'll have to sand it down. There are many fibers that are bent over and completely covered with epoxy. These...

Thanks for your advice. You're both probably right. I'll probably have to do it. It's just that I've already got a really thick layer down, so I don't need another coat for mechanical strength. It'll be another $300 and 6 hours for primarily cosmetic work. What about a light sanding to...

Here's the story. I just had a new detached garage built on a new concrete slab. After the slab was poured, I noticed little white fibers sticking up out of the concrete. After I etched the surface with muriatic acid, it seemed like there were even more fibers protruding from the surface. I'd...