I popped them on a baking tray on some grease proof paper (alongside my valve covers, clutch cover, and stator cover), and baked them at 100 degrees C for an hour.
It's a tad pongy. Best to run the fan in your rangehood while you do it. Helps to be the one who runs the kitchen, too.
CA cycleworks do a nice gasket, that doesn't even leak. I didn't use any threebond or other sealant, save a dab of motor oil to moisten it.
http://ca-cycleworks.com/products/maintenance/gaskets-o-rings/g2310aThe secret with VHT is to warm the can up in hot water, do a first really thin coat, then force yourself to wait a full twenty minutes before doing a second wet coat. Otherwise it's Birdseye city.