Detonator is Ratt's fifth studio album, released in August 1990.
Though their previous album, Reach for the Sky, went platinum, it met with some criticism regarding the quality of their songs. In an attempt to regain the popularity that Ratt had in the mid-1980s, the band parted ways with long-time producer Beau Hill. Hitmaker Desmond Child and his personal sound engineer Sir Arthur Payson were hired to helm the project.
This is the last album to feature guitarist Robbin "The King" Crosby before his departure in 1991, after the Japanese leg of the Detonator Tour.