In looking for instructions on rebuilding my booster pump, I can across http://www.pumpwarehouse.com/howtopolaris.html. These seem OK, except that I was surprised to see the following:
"... Do this properly by siliconing the metal part of seal that mates with seal plate # 5."
and
"Install white ceramic part of seal into impeller # 2 with a little silicone around rubber part # 3."

Is it recommended that silicon sealant be used when replacing the seal?