Leading industrial company in the USA, Airgas, use Viskrings to provide a tamper-evident seal on its cylinder valves. The Viskrings are printed with the company logo as an additional security feature.

Viskrings are biodegradable, being made from cellulose, and are stored in a preservative solution. They are applied by hand and dry naturally at ambient temperatures, shrinking as they do so. No machinery or shrink tunnel is required. This is an ideal sleeving solution for small to medium sized operations, especially those producing heat-sensitive products such as flammable gases.