Decorative Stick-On Astragal Bar Systems
Heritage Astragal Glazing Bar Units for Trade Installers
External glazing bars — also known as stick-on, plant-on or bonded bars — provide a straightforward way to achieve a heritage steel-look appearance without altering the structure of the insulated glass unit.
At Crystal Units, our external bars are supplied powder coated to any RAL colour so they can be matched to your frame finish and project specification. Each bar is professionally adhered to the glass using 0.75mm high-performance double-sided adhesive tape, delivering secure bonding and a clean, consistent appearance.
These systems are ideal for projects requiring a heritage steel-style aesthetic, Georgian layouts or contemporary grid designs while maintaining the thermal efficiency of a single insulated glass unit.
Available Profiles
We offer a range of external glazing bar profiles to suit different architectural styles:
Our Heritage Glazing Bar Systems
- Achieves an authentic multi-pane aesthetic
- Maintains full double or triple glazing thermal performance
- Powder coated to any RAL colour
- Clean, uniform finish
- Suitable for residential and heritage projects
Because the bars are applied to a single insulated glass unit, you achieve the look of traditional divided panes while keeping the practical benefits of modern glazing. These are the only bar systems in this range that can also be applied on site by the customer if required.
Stick-on Glazing Bars:
Factory-applied glazing bars offer clear advantages for installers and end clients alike. By applying stick-on astragal bars in a controlled manufacturing environment, we ensure precise alignment, secure bonding and a consistent finish across every unit. This reduces installation time on site, minimises the risk of damage or misalignment, and provides long-term durability — all backed by product warranty for added reassurance.
Built for Glaziers. Designed for Heritage Projects.
We understand that installation efficiency and finish quality are critical on heritage projects.
If you’re specifying glazing bars for an upcoming project, contact our team early in the process so we can manufacture your insulated glass units ready for installation.
With fast lead times, factory precision and product warranty for added reassurance, we help you deliver heritage aesthetics with modern performance — on time and with confidence.
By choosing factory-applied glazing bars, you benefit from:
- Reduced installation time
- Improved visual consistency
- Lower snagging risk
- Reliable long-term performance
- Professional presentation to your client
- Warranty
Why Should Glazing Companies Choose Crystal Units for Bar Units?
Because we make your installations faster, cleaner and more reliable.
Factory Precision, Every Time
Our glazing bar units are manufactured in a controlled factory environment, ensuring accurate alignment, consistent spacing and secure bonding. No site guesswork. No uneven sightlines.
Faster Installation on Site
Units arrive ready to fit. That means less labour time, fewer adjustments and quicker turnaround on projects.
Reduced Snagging & Call-Backs
Factory-applied bars minimise the risk of misalignment, detachment or cosmetic issues that can occur with site-fitted systems.
Wide Range of Profiles & Finishes
From Georgian and Astragal to Duplex and external stick-on bars, we offer multiple sizes and powder-coated finishes to suit heritage and contemporary requirements.
Thermal Performance Maintained
Our bar systems are integrated within high-performance insulated glass units, preserving energy efficiency while delivering the traditional multi-pane appearance.
Fast Lead Times
We understand project schedules. Our manufacturing capability allows us to offer efficient production and dependable delivery times.
Product Warranty for Peace of Mind
All factory-applied glazing bar units are covered by warranty, giving glazing companies and their clients added reassurance.
