Those preformed Silicone VC gaskets are worth it, but hard to find. They are impervious
to oil and reusable where the cork is permeable and will always weep and takes a set
after a short time.
The form-a-gasket is as Lee posted, a mess to use and you always take a chance
a dingle berry could break loose inside and plug up something unless you are very
careful.
dg
