Aluminium Sunglaze Cap
The Aluminium Sunglaze Cap is the middle piece of the Sunglaze three-part joiner. It sits over the panel edges once the sheets are in the base track, locks down onto the base, and holds the whole joint together. In the standing seam system the cap is what makes the joint watertight, because it compresses the gasket against the panel edge and closes the seam from above.
The cap is an aluminium profile supplied cut to length from 1.0m to 7.0m. It is fixed to the base with the Sunglaze SD hex screws, which are driven into the cap profile and hold it down against the base. Once the cap is locked in place, the aluminium cover clips over it to hide the screw heads and give the roof its clean, continuous top surface.
Because the cap sits on the visible top of the roof, the quality of the profile matters. The Sunglaze cap is designed to sit flush and straight along the run, which is what produces the architectural standing seam line rather than a bumpy joint.
Key Features
- Aluminium profile, the locking middle piece of the joiner
- Sits on the panel edges and locks to the base
- Compresses the gasket to seal the seam
- Cut to length from 1.0m to 7.0m
- Designed to sit flush for a straight standing seam line
Specifications
| Material | Aluminium |
| Function | Locks panel edges to the base and seals the seam |
| Length options | 1.0m to 7.0m |
| Fixing | Sunglaze SD hex screws |
| System | Sunglaze standing seam polycarbonate roofing |
Applications
- Closing sheet-to-sheet joints on a Sunglaze roof
- Sealing the seam over rafters and purlins
- Full system builds on verandas, pergolas and carports
What You Need To Complete The Job
The cap works with the Aluminium Sunglaze Base it locks onto and the Aluminium Sunglaze Cover that hides its screws. It is fixed with the Sunglaze SD hex screws. All the matching parts and the sheets are in the Sunglaze category.
Frequently Asked Questions
What does the cap do?
The cap locks over the panel edges once the sheets are sitting in the base track. It compresses the gasket against the panel edge and closes the seam, which is what makes the joint watertight in the standing seam system.
What length do I order?
The cap is sold per metre and cut to length from 1.0m to 7.0m. Order the length to match your joiner run. For runs beyond 7.0m, join sections cleanly or talk to the store about supply.
How is the cap fixed?
The cap is driven down onto the base with the Sunglaze SD hex screws. The screw heads are then covered by the aluminium cover, so no fixings are visible on the finished top surface.
Does the cap suit all Sunglaze sheets?
Yes. It is a standard part of the Sunglaze joiner system and works with every panel colour in the range. The locking geometry is the same across the system.
Why does the cap need a matching base?
The cap and base are designed as a matched pair. The cap needs the base track to lock into and the base needs the cap to seal the joint. Mixing profiles from different suppliers is not reliable, so keep the set together.




