Repair cracks in porch floor
I have a 100 year old house that has an exposed porch with a 4 inch T & G wood floor. It needs repainted but before I do I would like to fill the cracks and sand so I have a good surface to paint. The cracks are mainly at the seams of the flooring. They are around 1/4 inch wide. See photo.
I have tried Durham's Rock Hard Water Putty and Bondo Body Filler. They won't stay in the cracks. I found a product on the internet made by Lanco..
Siliconizer Crack Filler
Smooth Finish - Knife Grade
This procuct is what I think I am looking for. It is paintable, sandable, knife grade and elastomeric. The problem is I can't find it in my area (68025). I was wondering if you have something else to suggest or tell me where I can find this product. Thanks You.