Concrete is an album by American industrial metal band Fear Factory, recorded in 1991 but not released until 2002.

Robinson then sued the band and took them to court, which Bell jokingly said in 2021 was foreshadowing the entire career of Fear Factory as they would face more lawsuits in later years.

[5] Both Fear Factory and Robinson used the album to promote themselves, with Fear Factory using the demo to sign to Roadrunner Records and Ross using the demo to promote his work and attract the attention of local bands, and later of Korn, whom he produced for in 1994 and he would become a heavily sought-after nu metal producer of the 1990s.

[6][7] Burton C. Bell considers the album to be a demo, and the band subsequently used it to improve their songs.

The opening guitar riff in "Echoes of Innocence" was used as a synthesized motif in "A Therapy for Pain", the final track on Demanufacture.

"[2] Alternatively, Burton C. Bell was annoyed that Robinson had gone behind the band's back to sell the masters without their consent.