Glass based sealants are becoming more popular due to ease of applicatio, But AFAIK, durability is nowhere near that of CQF. CarPro came out with Hydro2 sealant a while back, VERY easy to apply, but in the 6 month range durability vs 2 yr for CQF. Multiple layers of CQF will add more thickness to the paint, hence more protection. You could do that with Sominiz possibly, not sure how effective it would be.