What material is the thermostat housing on the Vauxhall engine?

On recent Ford engines it is plastic and uses an elongated O-Ring as a seal rather than a gasket. Worth checking as you will need a new seal if similar to Ford.

Paul
Costock, UK
2014 4/4 Rolls Royce Garnet Red
Disco 5
Teddy - 17h1 Irish Draught cross