White. Clean, safe and easy to use as an alternative to drawing pins or sticky tape. It comes in strips and can be used around office and school. Recommended for use on non-porous surfaces. Simply tear off the amount of Bostik Blu Tack White required, pull and stretch until supple, and then roll into a ball. Place this between the surfaces to be fastened and press firmly. The adhesive properties of Bostik Blu Tack White increase with time so take extra care when removing it after a period of months. Small oily residues can be left behind. 60g per pack.