The present invention relates to a composition comprising at least one lipophilic thickener and at least one silane corresponding to formula (I) below and/or oligomers thereof: R1Si(OR2)z(R3)x(OH)y (I) in which: *R1 is a linear or branched, saturated or unsaturated C1-C22 hydrocarbon-based chain, which may be substituted with a hydroxyl group, a thiol group, an aryl group (more particularly benzyl), which is substituted or unsubstituted; R1 possibly being interrupted with a heteroatom (O or S) or a carbonyl group (CO), *R2 and R3, which may be identical or different, represent a linear or branched alkyl group comprising from 1 to 6 carbon atoms, *y denotes an integer ranging from 0 to 3, and *z denotes an integer ranging from 0 to 3, and *x denotes an integer ranging from 0 to 2, * with z+x+y=3, the silane(s) of formula (I) and/or oligomers thereof being present in an active material content ranging from 2% to 20% by weight relative to the total weight of the composition. The invention also relates to a cosmetic process for making up and/or caring for keratin materials comprising a step of applying a composition according to one of the preceding claims to the said materials.