Stelmax 1965 Gap Filler & Sealant is an easily applied white PVC resin, pigment, plasticiser and solvent mix, that will gap fill and bond readily to form maintenance free joints of exceptional strength when used to bond and fill rigid and plasticised PVC that is packaged in a 132g tube. Good adhesion can also be achieved when used with many porous substrates. 1965 is extensively used within the window industry for the installation of frames and attachments.