Silicate Paint

• Silicate mineral paints - https://en.wikipedia.org/wiki/Silicate_mineral_paint
• German manufacturer discussses 3 generations of this paint - [1]

Designing the Paint

• How sodium silicate has been used in wood prervation from prior art of a recent patent - [2]
• Sodium silicate preserves wood - [3]. Open source this.

Sourcing

• Potassium silicate - <$1/lb on ton scale - [4]
• Sodium silicate - $200/ton - [5]
• But wikipedia says that Minaral Silicate Paint uses potassium silicate. -[6]

Making

• You can make it from potash (KOH) reacted with silica desiccant beads - [7]

Buying

• https://www.keim.com/en-de/products/wood-coating/