SOAPY WATER / THINNERS
All resin installers know that they cannot work in the rain. The reason they can't work in the rain is because resin is moisture intolerant and working in the rain can result in water being bound in to the resin and the resin either foaming or blooming ( See pictures below ).
Even knowing this there are still a growing number of resin installers using soapy water as a trowel lubricant. This means they are directly forcing water into the resin and whilst the water can evaporate off during warmer weather in the winter it sits there and the low night time temperatures can result in blooming.
Blooming happens when water is introduced to the system and the water attacks the isocyanate hardener. All resins that are UV stable use isocyanates for their UV stability.
White Spirit, Xylene and other thinners.
Historically, many contractors have also used various types of thinners as a trowel lubricant. Contractors also use thinners to clean resin off of mixers, tools, vans or anywhere else that has resin on it that they want to remove it from.
To follow the logic through that thinners clean resin off, which means by using thinners as a trowel lubricant the surface layer of the resin will be removed during the troweling process. This can cause spalling ( stones de-bonding ) over a two year period. Also by removing the surface layer of resin the aggregate is exposed to the elements which can cause rust spots.
Both of these can easily be prevented or treated.
These pictures were all taken on the same day.
The trowel lubricant used was a mixture of washing up liquid and water.
The early part of the installation on the bottom left shows where higher day time temperatures and heat from this house have dissolved the water.
The insert at the top right shows the blooming caused by the water attacking the isocyanate during lower temperatures after the installation was completed and the water hadn't evaporated.
This can be treated on a dry day with the application of a roller coat.