In fact you and your customer will be best served by processing the parts oil free. We consider this proprietary information but we can tell you that we use only the best. Additionally it does not break down as a result of temperature cycling or moisture absorption and does not become embrittled. It depends on the application. Vacuums are undoubtedly the best insulators for static systems but our process is not static due to temperature cycling and loading.
All vacuums tend to leak.
F and 1200 F the inevitable leak occurs, just due to metal fatigue alone. Add to that the abuse the system will undergo during loading and unloading and you're just asking for a lot of trouble with a vacuum system. The other obvious drawback to vacuum insulation systems is the design limitations imposed due to the pressures involved. You're stuck with a round cylinder. Once the vacuum is lost you have a worthless piece of equipment.