Gelish Gel Polish Holy Cow Girl 15ml. Gelish has taken the beauty world by storm by being the first brush-in-bottle gel-polish ever invented and provides the salon industry with all of the tools needed to help make salon businesses even more successful, with the latest and greatest in nail products. Sculpt gorgeous nails with Gelish Polygel, creating strong, flexible nails that your clients can rely on. Gelish nail polishes cure in only 30 seconds under an LED lamp, ensuring a swift application process.