What is UV Stable Resin?
Resin-bound driveways, patios and paths can be hardy and last for many years.
Two main types are used for driveways: UV stable polyurethane, and non-UV stabilised polyurethane. The UV stable resin is more expensive because it is more refined.
What is the real difference between these two? The difference is quite obvious. UV stable polyurethanes or aliphatic (to the scientists out there), retain their clear colours and are not affected by UV radiation. Non UV polyurethanes which become darker brown under UV light (aromatic, to the scientists) turn a deeper brown. UV is recommended if you desire a resin bound surface that stays the same colour. UV is essential if you use a light or colored aggregate blend. The finished product will not be the same as the one you chose.
Non-UV may be acceptable if the aggregate mixture is yellow/brown. However unless the surface is fully exposed to UV, there will likely be some colour variation due shading. This is high risk because of parking cars, gates and trees as well as pots and pots. ).
Sources claim that Non-UV-stable systems can become brittle from UV exposure over time. However, the industry began as 100% Non-UV and has proven to be durable and strong. Non-UV resin can often be stronger than UV stable resin. The moral of the story is to use materials that have a track record.