Hi
you need a food safe sealant call loxeal 50-30
Red High Temperature One component moisture curing acetic silicon sealant by reaction.
Suitable for pumps, motors and hot fluid pipes.
Provides an extremely flexible gasket between surfaces and resists to vibrations, thermal shocks, water, gas, LPG, oils and several chemicals.
Keeps its sealing properties within temperatures of - 60° and + 275°C with peaks up to 350 °C.
Sealed parts can be disassembled using normal tools.
paul c, April 2009