Just as many competitive products have a wide range in quality levels, flexible PVC liners are no different.  The critical component used in producing flexible vinyls are specialized chemicals called plasticizers.  There are countless varieties of plasticizers that can make vinyl flexible but very few offer the attributes needed for the vinyl used in the drop-in liner industry.  It is safe to assume that the plasticizers used in producing garden hoses, blood bags, food packaging, car interiors, and children’s toys offer different characteristics then the plasticizers in our liner materials and they need to be selected accordingly.