Platinum cure silicone rubber can be quite an expensive exercise if you are doing a lot of hobbyist molding and casting. I am always on the hunt for a bargain price, but it needs to be reliable and consistent. My experience so far with the Harry & Wilma silicone has been great. Easy mix, good pot life and my final silicone castings were spot on. I also enjoyed some of the personal contact they made. I will be back for more. I have now added it to my range of go-to silicones.