Bostik prestik and blu tack is the original, white or coloured reusable putty like adhesive, which is clean, safe and easy to use. It provides an i deal alternative to drawing pins and sticky tape. Permanently plastic and pliable. Solvent free. Reuseable and strip form for ease of use. Excellent adhesive qualities. Acid free, non grease. Non toxic and suitable for all the family. Purchasing each unit.