When you are getting the Living Quarters key from the closet in the Greenhouse of the research lab (production zone), you set off an alarm. Since you cannot leave the way you came, use the rubber mallet to break the glass dome near the upper left corner of the lab.
you break it with your rubber mallet.
Idk but im right here with you i totally forgot it
it is in sully's steam powered paraphernalia
It is in a junk pile inside Sully's (to the left).
You find it on the island al the way to the left.After that, you break it with the mallet and pour it on the hot thing to get into the building
You return the key and the alarm will turn off and go get the mallet and come back and get the key.
Go to the left side of the island from Main Street. The left side includes Sully's Paraphernalia, the Living Quarters, and the Annex (storeroom). Inside Sully's Paraphernalia, pick up the Rubber mallet from the left side. On the right, ring the bell and the robot named Sprocket will be reactivated.
its in the museum on mainstreet of steamworks island :)
Rubber mallet is used to apply only a slow shock.
You have to leave through the roof dome, so you need the mallet from Sully's to break the glass where it is cracked (upper left).
It's Steamworks Island #14th Island
A rubber mallet is the name of a tool, and the rubber bit can be made out of several different materials, even certain plastics.