Recently had the top of my chimney rebuilt, as well as a new crown. Has anyone used this product?  Any reviews?  Also, the mason is going to spray the crown with Siloxane, along with the rest of the chimney. I plan to wait a week or so after that, but would it be OK to brush the product on the crown after the Siloxane is sprayed on it about a week later?
	
		
			
		
		
	
				
			 
	 
	 
 
		 
 
		 
 
		 
 
		 
 
		