I use this product mixed with sanding dust and paint to fill gaps in my very old pine plank floor in my old house. I need to seal the edges of the gaps with tape first. I use a popsicle stick to apply the mixture into the gap and then leave the tape on it for a couple of hours. The frog tape must then be removed, otherwise it will stick to the floor when the epoxy gets underneath. The epoxy is easy to work with and once mixed has ample time (about half an hour) to fully apply each batch. The only downside is that it's expensive. In addition, West System's technical team is particularly knowledgeable and helpful. They were kind and patient with me when I called with questions as I had never used epoxy before.