water based adhesives are acrylic copolymers solved in water. and when the water evaporates the glue has formedI have been doing this for 4 years now with no ill-effects. My scalp is in good condition. I only use water-based glues soluble with alcohol though; not the acrylic 4-weeks-at-a-time glues that Hairclub use. I don't think the glues I use are any harsher than hairgels and sprays really. Probably less harsh than hair dye.
water based adhesives are acrylic copolymers solved in water. and when the water evaporates the glue has formed
http://www.hairdirect.com/store/ghost-bond-adhesive-1-3oz.aspx
what's actually concerning is the absorption of acrylate to the systemic circulation and how that damages the health