If you are efficient with a soldering pencil and a solder sucker you can save the rest of the cells in the pack. You MUST Submerse the punctured LiPo cell in salt water ASAP doing so will neutralize the electrolyte and make it safe for disposal. Be certain to Submerse it completely in a high sodium solution.

I am not certain How the battery will react to Epoxy however you will have a fairly high risk of fire if you do either dispose of the bad cell or the entire pac.

Better safe than sorry, is your house or your life worth a $40 dollar battery? Be careful not to short out your LiPo battery pacs this will definitely cause a fire.

Be Safe