Request A Sample Located on the Red River, our supply of high quality proppant materials is continuously, naturally replenished. This affords us the ability to provide an always reliable source of proppants and concrete sand for any site or project. All of our products are quality checked and we hold them to the highest industry standards. 40/70 – premium frac sand 100 Mesh – frac sand C33 – concrete sand Click on a product above for available spec sheets.