IP67 Free-Cut COB: Cut Any Length With Zero Dead Zone

The Frustration of Fixed Cut Points

Anyone who has fitted waterproof strip to an exact dimension knows the problem: the strip can only be cut every few centimetres at marked copper pads, but the cabinet, sign or facade dimension never lands on a mark. You either finish short of the required length or overshoot and hide a tail, and cutting anywhere else severs a circuit and creates a dead section.

On IP-rated strip the problem is worse, because every cut breaks the factory seal and has to be re-capped and re-sealed correctly to keep water out. Field-sealing many short offcuts is slow and unreliable.

What Free-Cut (Arbitrary-Cut) COB Changes

• Cuttable at very short intervals, often effectively anywhere along the line.
• No dead zone: the strip still lights right up to the cut.
• IP67 encapsulation maintained when sealed with the correct end caps.
• Exact custom lengths with no wasted tail and minimal offcut.
• COB dot-free light all the way to the end of the run.

For exact-length outdoor and wet-area runs I use the IP67 free-cut COB ART-FCOBSE-X-528-24. It removes the fixed-cut-point compromise while keeping full waterproofing.

How It Achieves Cut-Anywhere Operation

Free-cut designs use a circuit and LED arrangement engineered so that trimming between the very short cut intervals does not interrupt the light along the remainder, unlike conventional strip where each LED depends on being within a fixed repeating segment. The result is that the cut line can land almost anywhere and the strip still illuminates fully up to the edge. The exact minimum cut interval is product-specific, so I work from the datasheet rather than assuming literally infinite cut resolution.

Where Zero-Waste Waterproof Cutting Pays Off

High-variation, exact-length, damp jobs benefit most.

Keeping It Waterproof After the Cut

Cut-anywhere does not mean seal-anywhere-carelessly. The IP67 rating after a field cut depends on fitting the correct waterproof end cap or connector and sealing it to the extruded body. I use matched accessories, clean the cut face before capping, and I never leave a freshly cut end open in a wet location. The convenience is that there is only one sealed end to deal with on an exact-length run rather than a series of re-sealed segments.

• Cut square and clean at the permitted interval.
• Fit the matched IP67 end cap or connector, not a generic cap.
• Allow sealant/cure time as specified before exposing to water.
• Test the sealed run before final enclosure.

Reducing Waste and Stock Complexity

For furniture makers and sign shops producing many different dimensions, free-cut strip changes the stock model. Instead of ordering many pre-set lengths or accepting offcuts, one reel can be trimmed to each job's exact size, which cuts waste, simplifies inventory and removes the dark dead tails that clients always notice at the end of a line. On batch production I pre-cut and seal all lengths from one reel, test them as a set and only then assemble, which is far faster than troubleshooting sealed tails on finished pieces.

Power, Heat and Mounting

Free-cut convenience does not alter electrical rules. I still size drivers for the actual loaded length, observe feed intervals on long runs, and mount the strip with appropriate thermal contact, because dense 528-class COB generates heat even when trimmed short. In fully sealed outdoor channels I allow the run to dissipate heat as intended rather than trapping it in an insulated enclosure, and I confirm the voltage choice suits the run length.

Specifying Exact-Length Waterproof Runs

Send the exact finished lengths you need, the environment (outdoor rain, bathroom splash, marine), the channel and mounting, and total metreage. I will confirm the free-cut IP67 COB, the minimum cut interval, the matched waterproof end caps and connectors, and driver sizing. We supply the FCOBSE-X-528-24 and recommend sealing and testing a sample cut first so the waterproofing method is proven before you trim a full production batch.

What Free-Cut Saved on a Real Batch of Signs

A sign shop was producing a run of individually sized illuminated cabinet letters for a chain of stores, each site needing slightly different stroke lengths and every cabinet sealed for outdoor mounting. On conventional waterproof strip the fixed cut points meant each stroke either ended short, leaving a dark gap at the corner, or ran long and required a dead tail to be folded and hidden inside a letter that had no room for it. Roughly one in eight lengths also produced an offcut too short to reuse anywhere.

Switching to the IP67 free-cut COB changed the arithmetic. Each stroke was trimmed to its exact measured length, lit cleanly to the edge, and sealed with one matched end cap. The shop pre-cut and sealed all letters for a site from a single reel on the bench, tested them as a batch, and only then assembled the cabinets, which moved the sealing work out of the finished letter and into a controlled production step. Waste fell to the short ends between letters rather than a pile of unusable fixed-interval offcuts, and the dark corner gaps that clients kept flagging disappeared entirely. The slightly higher metre cost of the free-cut product was recovered in reduced scrap, fewer sealed connectors per letter and faster assembly, and the uniformity from lighting every stroke to its true edge improved the finished look more than the cost saving did. The lesson is that free-cut's value is largest on high-variation, exact-length, sealed work; on long straight runs cut at standard intervals it offers little advantage and a normal IP67 strip is the economical choice.

Recommended Products

IP67 Free Cut COB LED Strip ART-FCOBSE-X-528-24

This IP67 free-cut COB can be cut at very short intervals with no dead zone, ideal for exact custom lengths outdoors.

Frequently Asked Questions

What does free-cut or arbitrary-cut COB mean?

It is strip engineered to be cut at very short intervals, effectively almost anywhere, without creating a dead section, because the circuit keeps the remainder lit right up to the cut. Unlike conventional strip with fixed cut points every few centimetres, it lets you finish at an exact custom length with no dark tail and minimal waste.

Is free-cut COB still waterproof after I cut it?

An IP67 free-cut strip stays waterproof when the cut is sealed with the correct matched IP67 end cap or connector and the seal is allowed to cure before water exposure. Cut square and clean, never leave a cut end open in a wet location, and test the sealed run before enclosing it.

Can I really cut it at any point with no dead zone?

Effectively at very short intervals rather than at infinite resolution; the exact minimum cut interval is product-specific and given on the datasheet. Within those intervals the remainder lights fully to the edge, so for practical signage, furniture and room dimensions it behaves as cut-to-length with no dead tail.

Where does free-cut IP67 COB help most?

Where exact, varying lengths meet moisture: outdoor sign letters, bathroom and wet-room coves, kitchen splashbacks, marine and vehicle trim, and furniture ranges made in many sizes. One reel can be trimmed and sealed to each exact dimension, cutting waste and stock complexity instead of ordering many preset lengths.

Does free-cut strip change driver or heat requirements?

No. Size the driver for the actual loaded length, observe power-feed intervals on long runs, mount with proper thermal contact for dense COB, and avoid trapping sealed runs in insulated enclosures. Free cutting changes how you trim and seal the strip, not the electrical and thermal rules.

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