Seals, gaskets and sealants 85 Purpose of oil seals 86 Types of oil seals 86 Servicing oil seals 88 Gaskets 91 Gasket materials 92 Handling and storing gaskets 93 Sealants and sealing compounds 93 Installing gaskets 93 How to make a gasket 95 Pipes, hoses and connections 95 Technical terms 96 Review questions 96