150ml tube. For radical styles and shapes and heaps of inspiration reach for OSiS Rock-Hard Ultra Strong Glue. With its long lasting hold and a glue like consistency, you can achieve drastic styles and a finish that lasts. A combination of five film forming polymers means OSiS Rock-Hard Ultra Strong Glue gives you the strongest hold possible, complete with ultra strong control for dramatic styling. Easy to work in, Rock-Hard is also easy to wash out. G.Force Styling Gel has an OSiS Control Level of 4 for ultra strong control, natural movement and style. Directions of use: Apply to damp or dry hair. Style, create and texture into your desired style.