ok well i can see the confusion here, one could assume that when your talking z cars and the "26" more common than not its an L26. and gorilla snot is RTV, if you mean some other type of sealer such as kawasaki bond, threebond or any other casehalve sealant you should probably specify so if your going to give advice, you wouldnt want your friends using "gorilla snot" on a high dollar imported engine now would you? just because nissan uses sealant for water pumps doesnt mean its the best thing to use, after all i think we can all agree that the quality of todays vehicles has been declining steadily over the last 30 years or so. Just because nissan uses a bonding adhesive to put their pumps on doesnt mean itmakes servicingthe water pump user friendly, it just means they have a robot installing a water pump vs a japanese man that woudl have installed the l26 water pump with a GASKET back in the day. so you tell him, goop, your mysterious "other sealant", or a gasket. if you guess the right ansswer maybe we will pat you on the back PAT, or we could give you a gold star!!!