  The mitigation of human-induced climate change is of crucial importance for
the sustainability of humankind. For this aim the RPC community has exerted
considerable effort over the last decade to reduce the emission of greenhouse
gases from our detectors. These included searching for new eco-friendly gases,
implementing recovery and/or recirculation systems, improving gastightness and
using new materials and approaches in detector conception and operation for the
reduction of gas flow rates.
  Along this line of work, we present here an RPC architecture aimed at a
dramatic reduction of gas use in chambers meant for low-rate operation. Two
chambers were tested for more than six months with zero gas flow showing no
evidence of time-related effects, allowing to consider that permanently sealed
RPCs may be within reach, with obvious practical and environmental advantages.
