More in Outdoors
The patio must be completely clean and dry for the epoxy to stick to it. First clean the concrete with a broom and then power wash it. Let the concrete dry.
To give the patio the look of an island, set boulders on top of it and around it. You can even use a concrete saw and jackhammer to etch out a portion of the patio to set boulders in. This will break up the rectangular shape.
Once the boulders are in place, set mortar all around the bottom, filling the voids. Use a wet mortar sponge to smooth it out and hide the mortar under the rock as much as possible.
Working in sections, spread some of the pebble mix on top of the patio, starting at the back corner. Mix the two-part epoxy in a five-gallon bucket, pouring both bottles out at the same time and hand stirring the mixture for five minutes.
Pour the epoxy mixture over the dry pebbles while a friend folds the epoxy into the pebbles with a shovel until it is thoroughly mixed and there are no dry portions left.
Spread the epoxy-pebble mixture with concrete trowels until it is smooth and level, about 1/4" thick over the whole patio. Use acetone to clean off the trowel and shovel when pebbles start drying and sticking to them.
Apply one section at a time, working from the back corner out so you don’t walk over the portions you’ve finished. Use an edge trowel to create relief cracks in the epoxy where they were in the existing concrete.
Let the patio dry for 24 hours before walking on it and cover if rain is expected. If the epoxy gets wet before it dries completely it can turn white.