Description from Amazon USA : Protek CLP is a cleaner, lubricant and protectant made from space-age polymers. This product removes verdigris (the green crud) and protects against future build-up by coating the center pin and sealing the felt from moisture thus preventing oxidation. Unlike silicone, Protek will not run, dry out or become ineffective. Since Protek will not harm wood, plastic, metal or the piano finish, it is excellent for damper guide rail bushings, underlever lubrication, front and balance rail pins, capstan screws and squeaky knuckles. Widely used, very effective product.
Especially useful on stiff and sluggish piano actions.
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