A needle assembly for a liquid applicator comprises housing withlongitudinal channel. The channel comprises upper and lower open ends. Aneedlebundle is movably mounted in the channel, which comprises needle shaft andneedlesattached thereto. A biasing member is configured and mounted for (i) biasingtheneedle bundle longitudinally towards a retracted position and (ii) biasing theneedleslaterally towards a needle-guiding side wall of the housing adjacent the loweropenend. The biasing member is configured and mounted to form a fluid seal betweenthelower and upper open ends. The biasing member comprises an elastic tubularsectionwith opposite sides. The first side has a first rectified length. The secondside has asecond rectified length longer than the first rectified length so that thesecond side isless tensioned than the first side to bias the needles towards the needle-guiding sidewall.
