We often hear from contractors that they apply Milamar products indoors, but many have never used our products for outdoors. There are some precautions to take when moving into the outside world:
Outdoor applications of epoxies entail a little more planning to ensure a quality installation. First, it is important to plan your installation so that it is done at a time of steady or falling temperatures; otherwise, out gassing caused by expanding air in the concrete can result in bubbles and pinholes in your finished coating. Note that it is always recommended to fill bug holes and other voids in concrete berms prior to applying the coating, as this greatly reduces the chance of pin holing. This can be accomplished with ICO Gel.
Another precaution is that you should not lay any of our 100% solids materials in direct sunlight, as this can result in large blisters being formed, especially on as-trowelled floors (this is less of a problem when applying a slip resistant coating/broadcast system). In areas subjected to freeze/thaw cycling, we suggest providing an especially aggressive profile (>40 grit size) when preparing the concrete to better lock in the epoxy with a good mechanical bond. And since most of this work is on slabs-on-grade, testing moisture content by conducting a calcium chloride test before applying your coating is mandatory, as is using a very good moisture-tolerant epoxy primer that is chemically resistant to the high pH’s of concrete. In this case, we recommend ICO Primer LV
We are also questioned about epoxy degradation under UV exposure. We have many outdoor installations of our coatings that are almost 30 years old and except for severe color fade and loss of gloss, the coatings are still intact. However, if appearance is an issue with your customer than you can always add our Ure Guard 80 or PM 500/550 as a UV-protective coating, albeit at a sacrifice in some chemical resistance, especially under concentrated acids.