PVC with a small amount of an engineered additive Ecopure™ to make them biodegradable.
PVC has higher specific density of 1.3 allowing these bailers to sink faster than HDPE bailers. Therefore weighting of PVC bailers is not necessary in most applications. A non degradable disposable bailer is used for only approximately 5 minutes, but it lasts for 100’s to 1000’s of years. A BioBailer™ is gone in a few years.