CNC High-Gloss Protection: Solvent-Free UV Coatings Deliver Scratch-Free Results with Automated Dispensing
We are pleased to announce the launch of 3769A, a solvent-free UV curing protective adhesive specially developed for high-gloss surface protection in high-end electronics CNC machining. Designed for fast curing and automated dispensing, 3769A helps manufacturers protect machined surfaces from scratches, fingerprints and process contamination while keeping production lines running at full speed.
Why High-Gloss CNC Protection Matters
High-end electronic components such as aluminum alloy frames, housings and precision structural parts demand flawless, high-gloss surfaces. During CNC machining, handling and downstream processing, these finished surfaces are exposed to scratches, dust, cutting fluid and mild oxidation. Rework caused by surface defects is costly and delays delivery. A reliable temporary protective coating has therefore become an essential step for manufacturers pursuing zero-defect high-gloss output.
Introducing 3769A UV Protective Adhesive
3769A is a blue, solvent-free UV-curable adhesive formulated to form a tough yet easily peelable protective film. It cures rapidly under UV energy of 800 mJ/cm², creating a low-hardness, highly tough coating that protects CNC-machined surfaces through subsequent processes. When protection is no longer needed, the film peels off cleanly in one piece with no residue, restoring the original high-gloss appearance.
- Fast curing, solvent-free: boosts productivity and meets environmental requirements.
- Low hardness, excellent toughness: 35 Shore A hardness with 360% elongation at break for reliable protection without brittle failure.
- Easy to peel, no residue: leaves substrates clean after removal.
- Wide substrate compatibility: suitable for regular metal, plastic and glass.
- Automation friendly: developed for high-efficiency automated dispensing in high-end electronics CNC lines.
Technical Specifications
| Model |
3769A |
| Color |
Blue |
| Viscosity at 25°C |
67000 mPa.s |
| Curing condition |
800 mJ/cm² |
| Hardness |
35 Shore A |
| Elongation at break |
360% |
| Storage condition |
12 months at 8-28°C |
| Packaging |
50g / 300g |
Application Scenarios
- CNC high-gloss protection: protects machined aluminum alloy frames, housings and structural parts from scratches, fingerprints and cutting fluid during handling and downstream processing.
- Metal, plastic and glass: compatible with the regular metal, plastic and glass surfaces used across electronics manufacturing.
- Automated dispensing lines: stable dispensing behavior supports robotic and automatic dispensing systems for high-volume production.
- Clean removal: the cured film peels off in one piece without residue, keeping parts ready for the next process.
Automated Dispensing: Protection at Production Speed
Traditional protective methods such as tapes and films are labor-intensive and difficult to apply on complex 3D surfaces. 3769A changes the game: it is applied by automated dispensing, cures in seconds under UV light, and is removed cleanly after protection is no longer required. This turns surface protection from a bottleneck into a seamless, high-speed step of the CNC production flow.
Availability
3769A is available in 50g and 300g packages with a 12-month shelf life under proper storage conditions (8-28°C, sealed container, away from direct sunlight). OEM and customized solutions are available upon request.
Contact us today to request samples and learn how 3769A can bring scratch-free, high-gloss results to your CNC machining line.
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