I've got to get through a few twists in my flue, and I'm looking to find the most flexible liner possible.  Most "flex" is very rigid... strong enough to stand on.  Right?  Well, I'm looking for a 5 foot long 8" oval-to-round adapter that I'm able to bend a little as needed.
Any ideas or more flexible brands?
	
		
			
		
		
	
				
			Any ideas or more flexible brands?