What is the shelf life of BacKrete?

The official answer is (12) months from date of purchase in normal storage.  However, the bacteria can lay dormant up to 2 years.  So even if the lid were opened the product would still be good.  But excessive heat,  at 160 degrees or greater will kill the bacteria. Freezing temperature will hold the bacteria dormant, but it will revive once it warms up. However, the powder will still abosrb at most any temperature.  For the bacteria to flourish, they need a hydocarbon food source, like diesel fuel,  moderate temperature 50- 100 degrees, and moisture.