Putting Two Vanities Together . This bathroom gallery is filled with 21 fantastic bathrooms with two mirrors. Wrap the putty around the bottom lip of the sink flange and press it firmly around the edges. This vanity is just SO pretty! 😍💖😍💖😍 repost nadiamercado.mua from www.pinterest.com The latter option will visually group your mirrors together, making your double vanity feel more like one solid unit. Mirrors play an important part in any room, including reflecting light to make a dark room lighter, or a small. You can frame each mirror with two lights for a total of four, or you can frame both mirrors with two lights.