Downhole seal element of changing elongation properties

A method of temporarily isolating a downhole location in a well, the method comprising:

• deploying an isolation device to a target location in a well;
• anchoring a drillable framework of the device at the target location;
• sealing the target location with a seal element of the device during said anchoring, the seal element having first and second body portions positioned on opposing sides of the seal element the first body portion having a diameter that is less than a diameter of the seal element, the seal element of a filler infused elastomer matrix exhibiting initially substantial elongation to break properties of above 200%,
• wherein the seal element is a compressible seal element that achieves sealable setting via compressible forces during the setting;
• performing a hydraulically isolated application in the well above the target location;
• and
• drilling out the device, the filler infused elastomer matrix exhibiting subsequently insubstantial elongation to break properties of less than 50% during said drilling.