I found that for the best luster and protection, I use Chemical guys's Jet Seal, It is super Hydrophobic, very easy to apply and the final product is just insane. The protection will last for 12months, yet I would recommend waxing your car as often as you can in the summer months. This Sealer is so easy to apply and polish, you can do the whole car in 30minutes. believe me, it's perfect for the Xpel or 3m. Since These products (Xpel, 3M) are quite porous, this sealer works like magic. If you are in the Calgary area, I buy this product at Carzilla.ca.. they are in the northeast. Great little shop and their prices are excellent.