About This UNBEATABLE HARDNESS - Crystal Serum Light (CSL) represents the pinnacle of paint protection technology. CSL forms a chemically bonded, ultra-durable ceramic layer with a 9H hardness rating. EXTREMELY DURABLE - If applied incorrectly, CSL can only be removed by machine polishing with 1,500-grit sandpaper, providing long-term protection against swirls, dirt, road fallout buildup. HIGH GLOSS - Provides lasting gloss enhancement and slick-to-the-touch feel and ultimate paint protection. NO-SOAK APPLICATORS - The soft microfiber applicators have a protective barrier that prevents coatings from soaking into the sponge, preventing product loss and saving time and money. EDGELESS BUFFING TOWELS - These pearl weave microfiber towels are soft and durable for leveling coatings. They are tagless and edgeless so they wont leave scratches, swirls, or high-spots.