Recessed & Plaster-In LED Profiles

Which plaster-in LED profile fits your LED strip?

Match your strip to the internal channel, never the external flange. The 60.3 x 15mm family has a 15.4mm channel and takes strip up to 15mm wide. The 55.5 x 13mm family has a 12.5mm channel, 8.8mm deep, and takes strip up to 12mm.

Profile	External size	Internal channel	Max strip	Lengths
Straight plaster-in	60.3 x 15mm	15.4mm	15mm	1m, 2m, 2.45m
Bendable plaster-in	60.3 x 15mm	15.4mm	15mm	2m, 3m
Straight plaster-in	55.5 x 13mm	12.5 x 8.8mm	12mm	1m, 2m, 2.45m
Clip-in recessed	25 x 7mm	Shallow flush	12mm	1m, 2m
Clip-in recessed	24 x 14.2mm	Deep flush	12mm	1m
In-ground floor	20mm deep	26mm	26mm flex	1m, 2m

• Going wider than 12mm: step up to the 60.3 x 15mm profile. Forcing 15mm tape into a 12.5mm channel damages the adhesive and the solder joints.
• Curves: only the bendable version follows an arc, down to a 200mm minimum radius, horizontally or vertically.

Plaster-in or clip-in recessed — which do you need?

Plaster-in profiles are buried by the plasterer and held by the plaster itself, which is what gives a trimless detail. Clip-in recessed channels drop into a routed groove in timber or MDF, held by clips and screws. The substrate decides, not the look.

• Plaster-in suits plasterboard: perimeter slots, cove details, corridor runs and staircase lines where nothing may stand proud.
• Clip-in recessed suits joinery: shelf undersides, stair strings, plinths and wardrobe interiors, where you can rout a groove and screw the channel down.
• Depth changes the line: the 25 x 7mm suits grooves no deeper than 7mm; the 24 x 14.2mm adds clearance between tape and cover, which smooths dotting. Pair either with dot-free COB tape.

Can you retrofit a plaster-in profile into a finished ceiling?

Not cleanly. The flange is designed to disappear under the skim, so fitting one into a decorated ceiling means cutting a slot, fixing the profile, re-skimming a band either side and redecorating the whole plane. Specify plaster-in details at first fix.

• Fix the driver position first, because once the profile is plastered in the only access left is at the end caps.
• Allow extra strip on curves: bending shortens linear coverage, so a 3-metre arc needs more than 3 metres of tape.
• Cannot re-skim? The surface channels and diffuser covers retrofit without touching plaster, and 45-degree corner channels handle wall-to-ceiling angles.

What is supplied with a plaster-in profile?

Every straight and bendable plaster-in profile ships with an opal cover, a front cap and an end cap. There are no mounting clips or screws, because the plaster is the fixing. The clip-in recessed channels differ: opal cover, end caps, clips and screws.

• Finish and guarantee: silver anodised aluminium throughout, 7 years on every profile, all UKCA, CE and RoHS marked. The 25 x 7mm is also stocked in black.
• Mask before plastering: tape over the channel opening so skim cannot set inside the cover slot. That is the one mistake nobody can correct afterwards.

Does the in-ground floor channel make an outdoor run waterproof?

No. The floor channel is an open extrusion with a push-in opal cover, so the housing on its own is IP20. Water resistance has to come from what sits inside it. Pair it with IP67 or IP68 neon flex for paving, decking and thresholds.

• 26mm internal channel: deep enough to take neon flex whole, so the cover finishes flush with the paving or decking around it.
• Match the flex to the exposure: IP67 neon flex for rain and splashing, IP68 for standing water.

What goes wrong with plaster-in LED profiles?

Four failures account for most of the calls the technical team takes, and every one is a planning problem rather than a product problem. Settle them at design stage and a plaster-in run becomes one of the most dependable details on site.

• Forcing a curve into a straight extrusion deforms the channel, and the cover then refuses to clip in along the bend.
• Cutting with the cover fitted cracks it. Slide the opal cover out, cut the aluminium, deburr, then refit.
• Ordering tape to the drawn length ignores what bends and end caps consume. Order a margin.
• Under-specifying the strip: below roughly 120 LEDs per metre, scalloping shows through an opal cover. Higher density fixes it, and a correctly sized 24V driver keeps the run even end to end.

Plaster-in and recessed LED profile FAQs

What is a trimless LED profile?

• Trimless means no visible frame around the light line. A plaster-in profile achieves it because the flange is skimmed over, leaving only the diffuser flush with the surface.

Can you fit a plaster-in profile in a bathroom?

• These are IP20 housings for dry indoor use. Any bathroom zone needs the strip itself rated for the exposure and the installation designed to BS 7671. Treat the profile as a housing, never as protection.

How many joins will a long run have?

• Across a 4-metre slot, 2.45-metre lengths give one join where 1-metre lengths give three, and every join reads as a faint shadow once lit.

Does a recessed LED profile need a heatsink?

• The profile is the heatsink. Aluminium carries heat away from the diodes far faster than plasterboard does, which is why bonding tape straight to board shortens its life.

Which strip suits a recessed ceiling slot?

• Continuous COB tape gives the smoothest line behind an opal cover. See the 24V single colour COB range.

Not sure whether your ceiling build-up suits a 13mm or a 15mm recess? Call the ATOM LED technical team in Telford on 01952 370028, Monday to Friday 9am–5pm, or email operations@atomled.co.uk.