Effective period / Period of releases: 1981 - 1983

Members: Steve Harrison (8), Steve Wright (20), Phil Wright (5), Charlie Wilson (7)

100% Proof is a Christian hard rock band from Stockport, North West England, England, United Kingdom, that was formed under the name Thin Ice in 1978. The band changed its name between the formation and the release of its first EP.

The band's self-released EP got the attention of Word UK and Norman Barratt. The first album was recorded and mixed in seven days according to Charlie Wilson.