Put the herbs and milk into a small heatproof pan and heat almost to boiling.
They are wax-based, so they are naturally more water-resistant and heatproof .
Wash jars and lids in a dishwasher and while still hot put on a heatproof tray into an oven at 120C for 15-20 minutes.
Put the kipper fillets in a jug or heatproof bowl and pour a kettle of boiling water over them.
The cloak was cool, but that didn't mean it was heatproof .
So you'd better be heatproof or just plain quick if you're collecting data from the surface of this forsaken place.
Using a heatproof spatula, put them on a plate and cook the remaining slices in the same way.
Place in a heatproof casserole dish; add about quarter-inch water.
Mix half the liquid ingredients together and spoon over a heatproof plate that will take the whole fish and fit in a large steamer.
Tip the layer of oil from the roasting tin into a heatproof jug - you can use it for roasting potatoes another day.