For the Pro detailers 35% SiO2
Whereas Quartz Easy emphasizes hydrophobics and durability (a stronger version of Moonlight), Quartz Guard favours slickness (slickness helps with coating 'self-cleaning'), as well as comes in a large 200ml bottle (will do at least 10~15 mid-sized vehicles), making a great choice for pro detailers for their customers looking for a 1~2 year coating (depending on layers).
Has a tinting effect making dark-coloured paint deeper and white's more reflective.