Barkinta shilka ee cadaadiska sare leh waxay ka samaysan tahay caag saliid u adkaysta.Marka loo eego faa'iidooyinka caag u adkaysta saliidda, sida caabbinta saliidda wanaagsan, caabbinta xidhashada sare, adkaysiga kulaylka wanaagsan iyo adhesion xooggan, barkinta shilka ee cadaadiska sare leh ayaa sidoo kale dhaxli doonta faa'iidooyinkan.