It is not so rare to see bubbles appear on epoxy coating. Bubbles are usually observed to be the size of a pinhead or more than an inch in diameter. You can find them in groups or scaterred around the floor. This is usually due to a phenomenon called ‘out gassing’. When the epoxy paint starts to dry, then this happens. When the air gets hotter, it will expand and this is what creates those small bubbles under the coating we just made.
To prevent bubbles being formed in epoxy floors application of a primer is recommended. Also never apply the coating in direct rays of the sun and always use a drill of a slower speed when mixing the coating.
If you are using a roller, I recommend that you go with a medium one. The epoxy should be applied very slowly in a gentle motion. Our epoxy garage paint will have less bubbles with this.
All those bubbles that are formed on the coating are removable with some sandpaper or a rotary scrubber. First roughen the bubbled area with the sandpaper. Then get on to some serious dust cleaning work. Then with a rag wipe the surface area with a strong solvent. When you finish this, apply one more coating. One more bubble type is fisheyes. The silicone that remained on the surface is one of the reasons.
This can be cleaned by scrubbing the surface area with sandpaper of a medium grit. When you are finished with this, you can clean the entire place with solvent dipped rag. It is now the time to apply the coating you prepared.
In case you have bubbles appearing through the entire floor, then you should consider to sand blast or shot blast entire area. You will need to sand blast the entire area of epoxy coating first. Use acid to clean the entire area where problem appeared. If the troublesome area is very small it can be treated in isolation. You will need to repair the area first and the you will have to make a new coating.
Our epoxy coating can have bubbles due to another reason: moisture. You can chech this by breaking one of the blisters and see is there any moisture there.
