Therm-Flo is a Modified Corn Starch for Thickening Canned or Frozen Foods. Made in the USA; Thermflo is Popular for Making Fruit Pie Fillings and Thickening Frozen Foods. Cook-Type Clear Jel; Works Well With Acidic Ingredients And Tolerates High Temperatures. Comes in a Convenient Resealable Bag For Ease of Use. Thermflo is a modified food starch derived from waxy maize. Therm Flo is an extremely versatile product that is especially applicable in high and low pH food systems where exceptional tolerance to heat and shear is required. Thermflo modified corn starch contributes a smooth, short texture and heavy body to both high and low pH food systems that are processed under conditions of high temperature, lengthy processing or high shear. Products made with Therm Flo modified food starch exhibit exceptional stability when subjected to various processing conditions. Thermflo modified starch is suited for many food systems including retorted foods, aseptically canned foods, and frozen foods. We purchase large quantities of Thermflo and repackage it into more practical sizes for your canning needs and at a price that is also practical for your wallet.