Industrial grade material is for non-potable use only. Some materials may be specifically formulated for containment of gas and oil products, other materials may be manufactured to handle elevated temperatures. We will be happy to discuss your particular needs and make recommendations based on information supplied. Water storage tanks made from the mighty redwood trees are common in this part of the country and many tanks range in age from 10 years to 100 years old. Redwood tanks will eventually leak due to fluctuations in water levels throughout the years.
Liners do work and it is an affordable way to add many additional years to the life of the tank.
We recommend 20 mil PVC simply because it is more permeable . The small amount of water that permeates through the material keeps the wood slightly damp on the inside of the tank. Thicker material, such as 30 mil PVC, is also suitable. Hypalon or any reinforced or semi-rigid material is not recommended because they lack the elasticity to conform to variations in the wood. Wood staves will shrink to some degree depending on location and exposure to sunlight.