what gasket sealer works best?

[chevyndn]

i have been having problems gettin my water pump in my 97 blazer to seal right... ive tried the permatex black gasket maker and im havin no luck. i seem to keep blowin the gaskets out. when i change the water pump in my 98 gmc i never had this problem, but it think i used a different gasket sealer. i cant remeber what kind i used on that truck. any help on what everyone uses would be helpful. im gona try another water pump and new gaskets this weekend thats why i was wondering.