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Polyurethane in alcohol solution is the chemical base on which we build both the 840 and the 841: a resin dissolved in solvent that, applied to the leather and left to dry, forms a continuous film. Unlike a pigmented paint, its main job is structural and protective, not decorative. On leather it performs three main functions. The first is a physical barrier: the film closes the pores and micro-cracks of the grain, protecting against abrasion, scratches and everyday mechanical wear. The second is anchoring and cohesion: in the softer version, the 841, it penetrates and wets the surface well, creating a primer that binds the following layers without stiffening the substrate. The third is aesthetic and functional: in the stiffer version, such as the 840, it forms a transparent, hard film that does not yellow, which enhances the natural grain while keeping the hand as unaltered as possible. Cross-linking with the 845-Clean-uP isocyanate hardener is what turns the film from a simple physical layer into a true polymer network. It is this chemical step that gives the PU its mechanical and chemical resistance over time, instead of a coating that peels or softens on contact with water, solvents or rubbing.
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Description
Clean-uP Skin is a two-component polyurethane coating for the surface finish (skin coat) of leather and technical substrates. The formulation, based on an aliphatic PU resin cross-linked with an HDI hardener, forms a transparent, hard film that resists scratching, designed to protect and enhance the surface without changing its natural hand.
Main features
The dried film is transparent, with high surface hardness and scratch resistance, and does not yellow over time. The fluorine-free formulation is free of water, DMF, toluene, PFAS, PFOA, PFOS and fluorinated compounds, and complies with REACH requirements.
Application
The product is applied by HVLP spraying, at a rate calibrated to the needs of the substrate and the desired final effect. Use HVLP nozzle 1.0 mm.
Fields of use
Surface finishing of leather for leather goods and footwear. Protection of technical substrates in automotive and furniture. Coatings for articles that require surface mechanical resistance and a transparent film.
PRODUCT CODE: CU-LTR-840-A:
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Description
The 841-Clean-uP PU Leather Flex Fluorine Free is a flexible two-component PU coating for areas under high flexing. Its primary function is as an anchoring primer before the 840 Clean-uP Skin, thanks to the wetting properties of the resin. It also has a secondary function of reinforcing areas subject to repeated flexing. Once applied and dried, the product forms a flexible aliphatic PU film with high elongation, non-yellowing, with high mechanical and hydrolysis resistance.
Main features
High flexibility and elongation at break, mechanical and hydrolysis resistance, non-yellowing film. Fluorine-free formulation, free of water, DMF, toluene, PFAS, PFOA, PFOS and fluorinated compounds, REACH compliant.
Application
Applied by HVLP spraying as an anchoring primer before the 840 coating, or as a localised reinforcement on areas with high flexing. Use HVLP nozzle 1.0 mm.
Fields of use
Anchoring primer for PU finishing systems on leather. Reinforcement of areas subject to folding and repeated flexing. Technical substrates that require high mechanical resistance and film flexibility.
PRODUCT CODE: CU-LTH-841-A:
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Description
Clean-uP 842 Skin is a two-component polyurethane coating for the surface finish (skin coat) of leather and technical substrates. The formulation, based on an aliphatic PU resin cross-linked with an HDI hardener, forms a transparent, hard film that resists scratching, designed to protect and enhance the surface without changing its natural hand.
It differs from the 840 because it has a MATT finish
PRODUCT CODE: CU-LTR-842-A:
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Description
The 843-Clean-uP PU Leather Flex Fluorine Free is a flexible two-component PU coating for areas under high flexing. Its primary function is as an anchoring primer before the 842 Clean-uP Skin MATT, thanks to the wetting properties of the resin. It also has a secondary function of reinforcing areas subject to repeated flexing. Once applied and dried, the product forms a flexible aliphatic PU film with high elongation, non-yellowing, with high mechanical and hydrolysis resistance.
It differs from the 840 because it has a MATT finish
PRODUCT CODE: CU-LTH-843-A: