This product, also known as 'baking parchment' or 'silicone paper' is something you will never do without once you've tried it. No more greasing, no more washing. Parchment is available from any baking supply company and it can be ordered by mail. I use so much of it that I purchase it in ten and twenty pound stacks of some 500 sheets from a commercial bakery supply house.
Most parchment paper is kosher.
You should be able to get five and six uses from one sheet - providing you are buying a good quality paper. Cut parchment paper in circles and line tube and spring-form pans for sticky honey and chocolate cakes. DO NOT substitute wax paper or greased brown paper for baking parchment. Parchment gives many baked good a more professional look. For instance, rich treats, Tollhouse cookies , come out with high rolled edges.