Semtex (disambiguation)

Semtex is a general-purpose plastic explosive.

Semtex may also refer to:
 * Semtex (album), a 1996 album by The Third Eye Foundation
 * Semtex (drink), a taurine-containing energy drink manufactured in the Czech Republic
 * DJ Semtex, a BBC hip-hop disc jockey and producer from the UK
 * Paul "Semtex" Daley (b. 1983), a British mixed martial artist
 * Semtex (anti-slip covering), a type of gritty cement-like compound used on the decks of Royal Navy ships
 * Semtex (open source software), an incompressible flow simulation code with spectral element method spatial discretisation