Yes, if you have allowed the sealant to air dry for a few hours to let the cross linking molecules form. But why do it? The only possible reason would be to fill the spider scratches and possibly increase the depth of the shine on a black or dark car. So which is better, a wax or a sealant? If you are looking for durability, then a sealant must be your choice. The best waxes will last maybe 50-60 days, tops. A paint sealant will last up to six months under the best conditions. From a shine point of view, a wax might provide a deeper shine on a dark car because of the greater oil content. This is not to say that a sealant will not shine. Personally, I prefer a paint sealant. Why? It goes on faster, comes off easier, and lasts longer. There is more value for the motorist and it is easier for the detailer to use. In some instances, you can put a coat of good wax over the sealant if you want to fill in spider line scratches on the paint. So, my conclusion is that a paint sealant is a better product to use than a wax in most instances.