There is nothing worse than paying for something you did not want. Like buying a white sealant for it to quickly turn yellow. This is both unsightly and unwanted, regardless of the excuse.
Here at Forgeway®, we put our customers’ needs before anything else so that you stick with us.
Environmental conditions are the most common cause of yellowing. These include factors like intense sunlight, changes in humidity or elevated temperatures. UV light given out by the Sun is absorbed by chemicals within the sealant, causing them to degrade and turn yellow. As they break down, they release free radicals, which are highly reactive and will continue to react within the sealant, unless dealt with. This can lead to further yellowing, chalking, adhesive failure and cracking.
To prevent this from happening, we include UV absorbers as our first line of defence. This class of chemicals are specifically designed to block UV light in the same way as sun cream.
Even if free radicals are generated, our sealants contain a mixture of highly effective radical scavengers that act as a second layer of defence. They work by reacting with the radicals to neutralise them before they can do any damage.
To confirm their effectiveness, we use environmental testing equipment to ASTM G154 standard, which exposes the sealants to strong UV light lamps, changes in humidity and temperature.

This is confirmed with real world testing once we are happy with the products performance. Therefore, our Formoa® range will not yellow for years to come, even when exposed to the harshest condition. Whether that is inside or out, sun or rain, Formoa® stays white and continues to shine.

Case Study | Sealant Yellowing