Xailin Gel Xailin Gel provides long lasting relief from dry eye sensations such as soreness, irritation or a gritty sensation by lubricating & protecting the eye, providing cooling & soothing relief. Xailin Gel is preservative free in the eye. The preservative used turns into water & oxygen upon contact with the eye, minimising the irritation that may be caused by traditional preservatives while still providing the convenience of a multi-dose form. Xailin Gel is suitable for contact lens wearers.