Plastikote 3100gp grout pen white 5ml plastikote 440 0003100 000 this white grout pen from plastikote is designed to put the finishing touch to tiles in just minutes it revitalises and re whitens discoloured grouting and re creates grout lines over painted tiles the pen refreshes grout without the cost of replacement thus saving money it is easy to use and has a low odour water based formula plastikote 440 0003100 000 3100gp grout pen white 5ml