I am in a serious pinch on a CVHA R-113 chiller that has multiple leaks. I found several small leaks but they obviously are enough to cause excessive purging issues. Years ago, we used to use a product to paint around flanges for a band-aid but I never knew the correct way to say/spell it. Kleptal or Gleptol or something close. Can anybody help me identify what the product was or something else that you can "paint" or coat around flanges to help slow vacuum leaks. Im working at a prison and this dang chiller has to run now. I would certainly appreciate any help.