Sentinel was founded in August 2000 with the initial intention of releasing a compilation of Irish Metal bands from across the country and then to continue to develop into a Record Label. An Irish Metal mail-order was established in the hope that we could continue to stock and sell everything released by Irish Metal bands from demos, CDs and LPs to shirts, zines and any other related merchandise. In 2003 we expanded the mail-order in order to stock world wide Metal products.

on the 15th October 2022 the physical store reopens at the basement of 1 Cope Street, Temple Bar, Dublin 2 (Bedford Stuy Barbers)