At a recent trade show I was surprised to hear from a lot of different visitors (from different countries) complaining to me that epoxy screeds form too many bubbles on the surface. What they meant was that when the screed cures the bubbles leave an ugly looking surface with little holes that is very prone to dirt pick up. (see pic)
I was surprised that there’s still a lack of knowledge regarding the cause of these bubbles. I am planning a series of articles to help explain from my point of view what causes bubbles and what we can do to avoid them. Bubbles can be attributed to a number of reasons:
1. Problems with the substrate. Usually caused when the substrate is absorbent which leads to air being released
2. Poor application techniques. Most problem associated with bubbles are related to something going wrong during the installation
3. Problems with the actual product. A problem that is growing in importance as many low-cost companies are emerging with questionable product quality
This video below can give you some additional insights into what causes bubbles.
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