  We consider non-abelian kinetic mixing between the Standard Model SU(2$)_L$
and a dark sector U(1$)^\prime$ gauge group associated with the presence of a
scalar SU(2$)_L$ triplet. The magnitude of the resulting dark photon coupling
$\epsilon$ is determined by the ratio of the triplet vacuum expectation value,
constrained to by $\lsim 4$ GeV by electroweak precision tests, to the scale
$\Lambda$ of the effective theory. The corresponding effective operator Wilson
coefficient can be $\mathcal{O}(1)$ while accommodating null results for dark
photon searches, allowing for a distinctive LHC dark photon phenomenology.
After outlining the possible LHC signatures, we illustrate by recasting current
ATLAS dark photon results into the non-abelian mixing context.
