Here's the deal on garages :This is what your garage was done with... for about 300-400 total in cost.
https://www.homedepot.com/p/Rust-Oleum-EpoxyShield-240-oz-Tan-High-Gloss-2-5-Car-Garage-Floor-Kit-365185/314107171(That's just one color, there are many, including the one posted above. The "flakes" come in a jar and you roll down the solid color (like gray in his above) and then you sprinkle on the flakes to the density you want....)
It's important you have a clear coat put on, the second layer, that goes on top 48 hours later. And go total gloss... it's badass. It looks like that's what you got maybe.
What you NEED to know : EPOXY (any) will always 'yellow' over time if giving a lot of sun. In my last garage, I put down this amazing floor, but the bottom 2-3 feet yellowed with time via sun exposure. So, depending on where your garage faces and how much you keep it open - keep this in mind.
DO NOT USE on open porches and stuff in the back yard. That's a whole different world. Epoxy outdoors = bad bad bad for the reason above.
BACK/PATIO :I love Behr's "Granite Grip" products (again, lots of colors). It's basically paint with rocks in it, but it's the thickest paint you can think of, and it works amazingly great when put on right. Again, like the above, it's easy as hell to apply with a paint roller on a stick just like the above epoxy floor is.
It's a little more expensive, but it's just plain badass.