  We present a solution to the doublet-triplet splitting problem in
supersymmetric $SU(5)$ by enlarging the group to $SU(5)\times SU(5)$ and by
introducing two supermultiplets in the $(5,5)$ and $(\bar{5},\bar{5})$
representations of the extended group. The non-perturbative superpotential
associated to this gauge group provides not only the correct gauge symmetry
breaking but also the large mass for the Higgs triplets associated to massless
Higgs doublet. The method has all the advantages of the sliding singlet model
but without the drawbacks.
