Crystal Serum Light is the prosumer version of the world-famous Gtechniq Accredited Detailer Crystal Serum Ultra. It offers 80% of professional Serum Ultra’s performance, but if applied incorrectly can be machine polished from your vehicles paintwork. When it comes to adding gloss, resisting swirls, contaminant and dirt repellency, Gtechniq Crystal Serum Ultra and Serum Light are the pinnacle in paint protection. -Swirl and chemical resistance -Incredible gloss -Up to five years of durability*