Everyone I've had quotes from have told me that K Rend (silicone based) is the better product. Conflicting information being given. Is Parex a scratch render?Why do you want to use k rend?
I'm guessing its cheaper?
The cheaper you want stuff doing for, the worse job you're gonna get.
Isn't a forum a place to come ask the experts for an unbiased opinion instead going to people or tradesmen that will push a product they get the best deal on or try to sell themselves as the best thing since sliced bread??