Utomoni ndi mankhwala omwe ali ndi phenolic.Magalasi a utomoni ndi opepuka, kukana kutentha kwambiri, kukana kukhudzidwa sikophweka kuthyoka, kusweka kulibenso m'mphepete ndi ngodya, kotetezeka, kumatha kutsekereza kuwala kwa ultraviolet, magalasi a resin ndi mtundu womwe amakonda kwambiri magalasi amaso kwa anthu a myopia pakadali pano.