Abstract: A pressure vessel seal for sealing a pressure vessel joint of a pressure vessel to prevent fluid migration between an interior wall and an interior surface of the pressure vessel joint including an annular seal ring, coatings with the annular seal ring for engaging the pressure vessel for effecting a sealable relation therebetween under varying pressure and temperature conditions, and coating reservoirs formed with the annular seal ring for receiving the coatings therein permitting the coatings to sealably engage the pressure vessel joint while storing the coatings for enhanced spring back of the coatings under such varying pressure and temperature conditions.