Quote Originally Posted by timykoo View Post
Is there a curing time for Meguiars m21 (syntethic sealant) before applying a wax over it?

Is it advisable as well to do multiple layers of 476s then 845 over the last one?
I usually let the sealant cure for about 4 hours before I apply wax on top of it.

I think one single coat of 476 would suffice. but as sir ronki mentioned, you can do a 2nd coating pass just to make sure wala ka nalampasan.