The 18th of May 2019, we inspeted the Sengan tunnel, which is located between Iwate and Akita prefecture, in the Northern Japan. The result was amazingly good proofing that our MGSO4 boards does not have the same moisture absorbing issue as other magnesium boards in use.

Info about the Sengan Tunnel

Location: Tunnel Between Iwate and Akita prefecture in the Northern part of Honshu.

Length 2544m

MGSO4 boards mounted 2014

Picture from the inspection:

As can be seen, despite 5 years in a tunnel, the fittings show no damages or rust.

Despite the harsh tunnel environment, the fittings which holds the MGSO4 boards, show no damage, no rust as can be seen from the above two photos. Even the lowest fittings has got no rust during the 5 years.

It is also very clear that there are no miscolloring on the board.