Chazap Liquid Razor (Reinforce the hairline). Gives a sharp, crisp hairline. Direction: Spray Liquid Razor onto a neck strip or a piece of tissue paper. Rub around the hairline and allow Liquid Razor to dry (usually about 5 seconds). Using a trimmer or edger begin to make your outline around the hairline. After the hairline is complete, remove excess Liquid Razor with an antiseptic. Can be used on customers, who are allergic to conventional razor shaves but desire a sharp, crisp hairline. houseofbeautyworld.com offers only the highest quality products, allowing customers to shop with confidence.