maybe i am too late but, locktite on seal is mandatory , it is recommended by Suzuki ans is witted in the service manual. for the head gasket. i recommended oem because the oem head gasket is covered with a thin rubber seal BUT , last time i order a oem head gasket it was not covered with rubber and was identical to the cometic . So i don't know if Suzuki still product the rubber covered head gasket
the aluminum cometic base gasket is really a must , use it with case glue ( threebone) on both face. remember when using case glue , you must clean carefully before. apply a thin layer of glue on each surface , so for the base aluminum gasket you must apply glue on the gasket , under the gasket , on the engine crankcase and on the cylinder base . install the gasket and cylinder, lightly hand torque the bolt and wait 20 min , then torque to specification.
silicone not work hewer sine silicone will get eat by gasoline