Thank you for posting your feedback. The DAP Plastic Wood (All Version) is specifically designed and recommended for use as a wood repair filler on minor/cosmetic repairs. DAP does not recommend this product or other similar wood filler products we offer for large or deep wood rot repair applications. For these type of more extensive/complex repairs, the use of two component wood repair epoxies and their accessory primers would be recommended.
Although Plastic Wood is an excellent product, your best choice would be a putty type filler. Your floor will be subject to expansion and contraction and solid fillers tend to come loose over time whereas soft fillers tend to give and take with the movement of the floor. I've found that they are much more likely to last at least until the floor has to be refinished again.
Once the DAP Plastic Wood has fully dried, wood glue, similar adhesives. as well as wood finishing products such as: stains, primers, paints and protective coatings will function as if they were being applied to natural wood products.
DAP Plastic Wood is available in white under DAP item number 7079821412 (4 oz.). DAP Plastic Wood is not recommend for use on HPL (High Pressure laminate, such as Formica) or similar engineered counter-top surfaces.