Universal Landscaping Adhesive is the ideal partner for all trades. It bonds wood, paper, polystyrene, foam (polyurethane) and plastics quickly and safely. So it's ideal for gluing model buildings, trees, arches, walls and connecting various DIY equipment. Landscaping is a water-based glue in a handy bottle with Dosiernase and bonds in about two hours. Distribute gravel to the sills around and in the gaps. Then sprinkle the Dosiernase glue ballast over the gravel. Make sure no dirt rabbits remain on the sleepers or material are from the track. This would disrupt train movements later.