They also aided their owners in finding seals by alerting them to seal blowholes. Another advantage is the extrusion of pipes with integrated coupler including rubber seal. Square rings are usually used only in dynamic applications as energizers in cap seal assemblies. However, the marble inside did not seal the liquid. Tree gum could also seal the holes. There are two US standards for determining the quality of any thread seal tape. The use of a notary seal is required. Starbuck orders the carpenter to seal and waterproof it. This helps to seal off the cleft. Precision-faced bolts would seal as well, and could be economically manufactured. There are two inscriptions on the seal. The interpretation of the seal continues to be disputed. He briefly acted as one of the commissioners of the privy seal. The clerks of the Privy Seal and Signet. Other species popularly kept include the grey seal and harbor seal.