The single biggest difference between premium and cheap dome labels is the resin. Bora Ajans uses only 1st-grade two-component polyurethane (PU) resin — never epoxy. The technical reasons are decisive.
📌 The Epoxy Failure Mode
Epoxy resin in its standard formulation has no UV stabilisers. Within 3–6 months of outdoor exposure the resin yellows — your white logo turns cream, then beige, then orange. The polymer also becomes brittle: minor flexing produces stress cracks visible under the dome.
📌 Why PU Wins
- UV stable: built-in HALS stabilisers — no yellowing for 5+ years exterior
- Self-healing: low Tg means light scratches recover at room temperature
- Mechanical flexibility: survives flex, vibration and impact without cracking
- Chemical resistance: resists fuel, oils, mild solvents and salt water
📌 Cost Difference
Quality two-component PU resin costs 30–50% more per kilogram than epoxy. Over a 5-year service life the cost per year is dramatically lower than re-applying epoxy domes annually.
📌 How to Tell PU from Epoxy
Visually, a fresh epoxy dome and PU dome look identical. The difference appears after 6–12 months of exposure. Reputable manufacturers will provide material safety data sheets — ask for the resin specification before ordering.
📌 Bora Ajans Standard
Every dome label leaving our facility is two-component PU. We do not stock epoxy resin and never produce epoxy dome labels — ever.