Amazon.com: White Silicone Rubber Sheet, 60A Duro, 1/16 x 9 x 12 Inch, Food Grade, Made in the USA, No Adhesive Backing, High Temp Heavy Duty for Gaskets DIY Food Covers Lids
Amazon.com: MATNIKS Food Grade Silicone Rubber Sheet 12x12-inch by 1/16 White - Duro Shore A65 High Temperature Heavy Duty for Gaskets DIY Food Covers Lids Sealing Material Supports Microwave Oven Protection :