TiO2 is an inexpensive and ubiquitous white pigment used in a lot of paints (and serious sunscreen products for the skin).
Please let us know how much TiO2 you decide to mix in, where you sourced it, particle size, and if it left any clumps. If you get a chance, a sample of fabric with and without the added TiO2 left in the sun for a few years might give some interesting info.
This could explain why white/light paints and primers reportedly protect the fabric slightly better than dark paints and primers-- more TiO2.The main takeaway I got from him, was to use the best premium latex product I could find (of any mfr) with the highest concentration of "Titanium Dioxide". It is TiO that is the main source of UV protection. He further stated that in the primer coat, we should add TiO to further increase its effectiveness on fabric protection. It is not expensive at all and I have a small package ready to mix and use when we get to that point in our build. I will post here our experience in using it.
Please let us know how much TiO2 you decide to mix in, where you sourced it, particle size, and if it left any clumps. If you get a chance, a sample of fabric with and without the added TiO2 left in the sun for a few years might give some interesting info.
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