Thank you for posting your feedback. We're sorry to see your low star review on DAP Plastic Wood Solvent Professional Wood. This product is designed for minor cosmetic repairs, such as: nail/screw holes, cracks, knot holes, etc. The photographs that you included in your review appears to depict “deck boards” in rather distressed condition (nearly the entire application surface exhibits significant checking/splitting). Large format repairs such as rot repair, edge/grain filling, “skim coating” (resurfacing) are well outside the scope of this product’s intended uses. Likewise, as with any hard setting wood repair filler, they should not be applied to unstable surfaces, joints, seams or other areas prone to movement. Unfortunately, DAP does not offer an appropriate product to address this type of project/condition. Should you have any additional questions or require further assistance, please feel free to contact DAP’s Technical Customer Service Department at 888-327-8477.