Transparent glue Multi User Multi Materials 20gr Pattex Multi-uses for at home, at school or at the office. Ideal for crafts and leisure Clean the surfaces before starting the collage. A good collage is reached when the surface is dry and devoid of dirt and fat. Very smooth surfaces should be made rough with sandpaper. For porous materials (for example wood or cardboard), apply Multi Pattex to both surfaces and assemble the two surfaces together. Only in the case of two non-porous surfaces, let the solvents evaporate about 5-10 minutes before assembly, and then assemble the two surfaces together. Prestalia E-commerce solutions.