Architectural 4x10mm Side-View Silicone LED Neon Flex | IP67 Waterproof Slim Linear Lighting for Curved Facades

1. Product Overview — A 4mm Slim Light Line Engineered for Architecture

The Architectural 4x10mm Side-View Silicone LED Neon Flex is LEDLetsGo's precision linear light for projects where the luminaire itself must disappear and only a continuous, saturated line of light remains. The profile measures 4.0mm (width) x 10.0mm (height), with a 4mm side-emitting window, so it reads as a crisp luminous strip when viewed from the intended angle and as an almost invisible silicone bead when off.

It is built for the people who specify and install architectural lighting — facade contractors, stone and concrete specialists, sign makers, interior joinery workshops and lighting distributors — who need a silicone neon profile that survives weather, handles tight radius work, and installs cleanly into stone, concrete or timber reveals.

• Ultra-slim 4.0 x 10.0mm side-view profile for channel letters, coves, facade joints and furniture reveals.
• 120 LEDs per metre behind a frosted diffuser for a dot-free, uniform light line.
• True IP67 waterproof construction with sealed injection ends and waterproof connectors.
• DC12V / DC24V low-voltage operation with smooth dimming over long runs.
• Platinum vulcanized silicone body — anti-UV, salt-mist resistant and anti-yellowing.
• Design-friendly tight side bends for curved facades, radius corners and sculptural layouts.

Quick Reference Specification

Profile	Side-view (side-emitting) silicone LED neon flex
Cross-section	4.0mm (W) x 10.0mm (H), precision extruded, ±0.1mm dimensional tolerance
Luminous window	4mm side-emitting window, frosted diffusion layer
LED density	120 LEDs/m (dot-free uniform glow)
Colour temperature	3000K / 4000K / 6000K standard; custom CCT on request
Input voltage	DC12V or DC24V (factory configured)
Waterproof rating	IP67 (silicone body + sealed ends + waterproof connectors)
Housing material	Platinum vulcanized silicone, UV-stabilised
PCB	Flexible 2oz copper PCB
Dimming	PWM / phase-cut dimmable with compatible drivers (0-100%)
Reel length	5m standard; longer runs and custom cutting available

2. Material Science — Platinum Vulcanized Silicone, Anti-UV & Salt-Mist Resistant

The housing is platinum-cured (addition-vulcanized) silicone, not ordinary PVC or peroxide-cured rubber. Platinum vulcanization produces a cleaner cross-link network with no peroxide by-products, which is why the body stays flexible, optically clear and dimensionally stable over years of UV exposure.

• Anti-UV & anti-yellowing: UV-stabilised formulation maintains water-white transmission so the light line keeps its true colour temperature without ambering.
• Salt-mist resistance: The silicone envelope and sealed construction withstand coastal and roadside salt-laden atmospheres — validated for marine-adjacent facades, seafront signage and bridge/parking environments.
• Wide thermal window: silicone retains elasticity from roughly −40°C to +200°C, giving safe outdoor operation and simple thermal management inside enclosed channels.
• Chemical resilience: resistant to mild acids, alkalis, alcohols and common cleaning agents used on stone and concrete.

3. Engineering — 4.0 x 10.0mm Precise Tolerance & Neutral-Axis Bending Physics

Dimensional control

The 4x10mm profile is manufactured to a nominal 4.0mm x 10.0mm cross-section held to ±0.1mm. Tight tolerance matters in architectural work: a channel, groove or recess machined to 5-6mm will only accept the strip consistently if the extrusion, PCB width and final assembly are controlled at every metre. LEDLetsGo holds the extruded silicone envelope and the finished assembly to the same drawing, so 100m of product behaves like 100m of the same piece.

Neutral-axis bending physics

Any flexible composite that bends develops tensile strain on the outer fibres and compressive strain on the inner fibres, with a strain-free plane in between — the neutral axis. For a laminated light strip the designer's job is to place the critical, fatigue-sensitive elements (the copper circuit and the LED solder joints) as close as possible to that neutral axis, and to keep the bending envelope within the elastic limit of the silicone.

• Copper PCB placement: the flexible 2oz copper PCB sits near the neutral plane of the cross-section, which minimises repeated-flexing fatigue on traces and solder joints during installation and re-positioning.
• Radius of curvature vs. thickness: for a given bend radius R, the induced surface strain scales with cross-section thickness divided by 2R. The slim 4mm x 10mm section therefore tolerates much tighter radii than 12mm or 16mm profiles.
• Side-view window orientation: because the 4mm luminous window is on the side face, the strip can be bent in the flat plane to follow curved wall runs while the light line stays aimed at the viewer — the geometry behind “tight side bends for curved facades”.
• Bend guidance: as a working rule the 4x10 profile accepts approximately 30mm minimum radius in the flat plane and approximately 60mm in the vertical plane; tighter radii are validated against your mounting drawing before production.

4. Installation — Hidden Recessed Guide for Stone & Concrete

The most reliable way to install a 4x10mm side-view neon flex in hard materials is the hidden recessed guide method: cut or cast a shallow chase, seat the strip so the 4mm window sits flush with the surface, and let the surrounding stone or concrete become the luminaire housing.

• Chase preparation: cut a groove slightly wider than 4mm (typically 5-6mm) and 10-12mm deep. A 4mm reveal width keeps the strip mechanically trapped while the side window remains fully exposed.
• Concrete casting: for cast-in-place work, formers or PVC liner profiles create a clean rebate during the pour — no post-cutting, no dust, no chipped edges.
• Stone / granite / marble: diamond-ground chases follow curved wall geometry; the flexible silicone body negotiates gentle curves inside the chase without point loading.
• Fixation: apply a thin, continuous bead of neutral silicone adhesive or use stainless clips at 30-50cm centres; never rely on the PCB tape alone in outdoor stone.
• Sealing and serviceability: IP67 sealed ends and a waterproof connector allow a service loop at each joint; the strip can be withdrawn and re-laid if a section ever needs replacement.

5. Professional Applications

From stone facades and concrete stair stringers to hotel lobbies, bar counters, wardrobe reveals and channel letters, the 4x10mm side-view profile gives lighting designers one continuous architectural accent line with a single consistent cross-section across the whole project.

6. Professional FAQ — 12 Technical Questions for Specifiers

1. What does “4x10mm side-view” actually mean, and where is the light emitted?

The numbers are the finished cross-section: 4.0mm wide and 10.0mm high. “Side-view” means the 4mm luminous window is on the long side face rather than the top. The strip is installed with the window aimed toward the viewer or the surface to be grazed, which is what makes it ideal for facade joints, channel letters and recessed reveals.

2. How is the 4.0 x 10.0mm dimensional tolerance controlled?

The silicone envelope is precision extruded and the PCB width is held to spec before assembly; the finished profile is controlled to ±0.1mm and sampled per batch against the drawing. This is what allows the strip to fit repeatedly into machined 5-6mm chases.

3. Why is 120 LEDs/m combined with a diffuser better than fewer, brighter LEDs?

120 LEDs per metre behind a frosted silicone diffuser lowers the individual source brightness and spacing, so the window reads as one continuous line rather than a dotted string — essential at short viewing distances in coves, counters and handrails.

4. What is the difference between bending this profile in the flat plane versus the vertical plane?

Bending the 10mm face (flat plane, like a ribbon) is the most flexible direction, used for curved wall runs. Bending the 4mm face (vertical plane) creates tighter directional changes such as corners and returns; because the section is only 4mm thick in that direction, the bending physics remain favourable, but minimum radius is larger in that plane (see Engineering section).

5. What does IP67 mean for stone, concrete and outdoor installations?

IP67 means the product is dust-tight and protected against temporary immersion (up to 1m for 30 minutes). For a facade line this covers rain, pressure-washing of stone, condensation inside chases and coastal humidity — provided ends are sealed with the supplied end caps and joints use waterproof connectors.

6. How is the neutral-axis construction relevant to a curved facade project?

Repeated bending of a laminated strip fatigues copper traces and solder joints if they sit far from the strain-free plane. In this profile the flexible PCB is positioned near the neutral axis of the cross-section, so the strip can be curved, straightened and re-curved on site without micro-cracking the circuit.

7. Can the strip be cut on site, and what happens at cut points?

The strip is supplied with factory-defined cutting positions and matching end caps. Cut to length at a marked position, seal the new end with the cap and reconnect through the waterproof connector system. For large runs, request pre-cut, pre-terminated lengths so every joint arrives factory-sealed.

8. DC12V or DC24V — how do I choose, and how long can a run be?

Both versions are available. DC24V carries the same power at half the current, which reduces voltage drop and supports longer single feeds — typically the better choice for runs above 5 metres. With the 2oz copper PCB, a single 24V feed reliably powers long continuous runs; confirm the exact maximum for your wattage with our engineers and inject power where a layout exceeds it.

9. What dimming and control options are supported?

The strip dims smoothly from 100% down with a compatible PWM or phase-cut LED dimmer matched to the DC driver. The low-current 24V profile also integrates cleanly with smart-home systems, presence sensors and daylight sensors; our engineers provide free wiring diagrams for projects.

10. What temperatures can the product withstand in an enclosed stone or concrete chase?

Silicone remains elastic from approximately −40°C to +200°C, so the housing is not the limiting factor outdoors. In sealed chases the practical limit is driver and LED junction management: keep ambient around the PCB within the operating band and derate for fully enclosed, sun-facing installations. Thermal data for your exact power level is provided with the spec sheet.

11. How is run-to-run colour consistency handled on multi-reel projects?

Order all reels for one installation at the same time and request binned production. LEDLetsGo holds CCT tightly within a narrow bin per production batch and can supply matched-batch runs for multi-floor or multi-zone projects so adjacent lines do not show a step in colour.

12. What documentation and compliance support is provided for tenders and exports?

Each order can be supplied with datasheets, installation drawings, CE and RoHS documentation, and test reports on request. For architectural tenders we also provide project-specific bending-radius validation, driver sizing calculations and sample boards so the specification is locked before mass production.

LEDLetsGo is a manufacturer of premium COB LED strips and LED neon flex with in-house production, batch testing and dedicated engineering support — a complete sourcing partner for facade contractors, stone and concrete specialists, sign makers and lighting distributors.