Aluminium Ceiling Shadow Gap Profile C-2M (RAL 9003 / RAL 9005)
Plaster-in aluminium ceiling shadow gap trim for indirect LED lighting, with a fixed 21 mm shadow reveal around the perimeter.
The C-2M profile by ASP Profiles is designed to create a minimalist shadow gap at the wall-to-ceiling junction and a niche for a concealed LED strip. Its precise geometry ensures straight, stable perimeter lines and a “floating ceiling” visual effect. The profile is engineered specifically to match the standard 12.5 mm drywall thickness. The fixed shadow gap size is 21 mm.
Often specified as a ceiling shadow gap trim, C-2M creates a precise architectural break between wall and ceiling.
C-2M is designed for reflected (indirect) lighting: the light gently spreads across the wall, creating a smooth, glare-free gradient without a plastic diffuser. Installation is mechanical.
The profile is made of 6063-T5 aluminium alloy, which helps dissipate heat from the LED strip and increases the system’s durability. Stock colours are RAL 9003 (white) and RAL 9005 (black); other RAL colours are available on request.
Technical library for architects:
- 📑 View catalogue (PDF)
- 📐 Download technical drawings (DWG)
- 🧊 Download 3D models
- 🧪 Order samples — to evaluate the finish and lighting effect in person.
🇬🇧 Notice for UK Customers
Payment & Taxes: Our website automatically identifies your region and does not charge VAT (VAT 0%) at checkout. You can choose any payment method — the price will remain tax-free. Please note that UK import VAT is still collected by the courier upon delivery.
Logistics & Inspection: Delivery of oversized items from our EU warehouses typically takes 5–10 business days. Please inspect your order within 3 calendar days of receipt.
Reference: official information on gov.uk.
Why choose C-2M
- A modern ceiling shadow gap detail with a clean, even perimeter gap.
- Suitable for a concealed LED strip and soft indirect (reflected) lighting.
- Precise geometry for straight perimeter lines and a stable visual effect.
- 6063-T5 aluminium helps dissipate heat and maintains system rigidity.
Finish options
- Stock colours: white RAL 9003 / black RAL 9005.
- Other RAL colours — on request.
How to order a custom colour? Click the “I want to paint it my own colour” button, then click “FOLLOW UP”, enter your e-mail and send the request. We will contact you to confirm the details.
Technical specifications
- Length: 2500 mm
- Material: 6063-T5 aluminium alloy
- Finish: powder coating (RAL 9003 / RAL 9005)
- Lighting: LED strip (indirect reflected light)
- Fixing: mechanical
- Application: residential, office, commercial, and architectural interiors
Installation instructions (short)
- Prepare the ceiling structure and mark the lighting line.
- Install the profile around the perimeter according to the reference level.
- Adjust the depth of the light niche to achieve the required effect.
- Mechanically fix the profile.
- Fill and level joints/seams flush to the surface.
- Install the LED strip and connect the power supply.
- Complete the final finishing of the ceiling and walls.
