Powder-coat colour-retention warranty conditions — air outlets
10-year colour retention of the standard powder coat, counted from the delivery date · ΔE*ab ≤ 5 (ASTM D2244) · indoor installation, corrosivity C1–C2 (ISO 12944-2)
Starduct gives this warranty voluntarily and performs it directly. The warranty certificate issued by Starduct for each contract / order states the certificate number, project, products, delivery date and expiry date; the number can be checked on the Verify page.
1. Scope
- All new grilles, air outlets, diffusers and louvres manufactured by Starduct with the standard powder coat and installed in accordance with Starduct's technical instructions.
- Indoor installation in corrosivity category C1–C2 per ISO 12944-2.
2. Period and start date
- Colour-retention warranty period: 10 years, counted from the delivery date stated on the delivery note and on the warranty certificate.
- Expiry date = delivery date plus 10 years.
3. Criterion and colour measurement
- The colour of the standard powder coat does not change by more than ΔE*ab = 5 over 10 years of use; no serious chalking, peeling, pitting or blotching.
- Measured with a spectrophotometer in CIE L*a*b*, per ASTM D2244 and ISO 7724; a new sample is the comparison reference, measured at no fewer than 5 different points on the product surface and averaged.
4. Conditions for warranty
- The product is made by Starduct with its original powder coat, not overpainted or surface-treated afterwards.
- Installed, operated and maintained in accordance with Starduct's technical instructions.
- Service environment: continuous temperature ≤ 50 °C; humidity ≤ 90 % RH, non-condensing; no direct contact with corrosive chemicals, strong solvents, high concentrations of sea-salt mist or acid fumes.
- Records proving the installation date and periodic maintenance are available.
5. Exclusions
- Damage from incorrect installation or strong mechanical action (impact, cutting, drilling…).
- Outdoor installation or corrosivity C3–C5 environments: chemical plants, industrial zones, coastal sites within 2 km of the sea, salt-spray areas without additional protection.
- Direct or frequent contact with chemicals, solvents, acids or alkalis.
- Natural disasters, fire, flooding or force majeure.
- The customer has overpainted, modified or altered the product's construction.
- Periodic maintenance recommended by Starduct has not been carried out.
6. Care and maintenance
- Clean the surface 1–2 times a year with a soft cloth, neutral soap solution and clean water; do not use hard brushes or strong chemicals.
- Near sources of salt mist or heavy pollution: increase cleaning to 3–4 times a year.
- Inspect the surface yearly to detect scratches or damage early; keep hard objects from rubbing against the coating.
7. Remedy
- 100 % replacement of the defective product (no repair, no repainting).
- Removal, transport and reinstallation labour are not included.
- Processing time: within 30 working days after the defect is confirmed as covered.
8. Claim procedure
- The customer notifies Starduct in writing / by email with the warranty certificate number, photos, video and a description of the defect.
- Starduct sends a technician to inspect on site or asks for a sample to be sent to the factory.
- The colour difference ΔE*ab and related technical parameters are tested.
- A conclusion is issued and the product is replaced if eligible.
9. Environments outside this scope — Jotun systems
- C3–C5, outdoor, coastal or industrial environments: choose Jotun Facade (AAMA 2603 / Qualicoat class 1, 15 years) or Jotun Super Durable (AAMA 2604 / Qualicoat class 2, 25 years).
- These two systems are warranted directly by Jotun under Jotun Powder Coatings' terms and are not part of Starduct's 10-year warranty.
Source: the article “Colour durability warranty for the powder coating” (2025), updated 3 Nov 2026: 10-year period, counted from the delivery date. Where this page differs from the issued warranty certificate / signed contract, the certificate and contract prevail.
Star Asia Technological Investment JSC (STARDUCT) · Dan Phuong Industrial Cluster Phase 2, Dan Phuong Commune, Hanoi City, Vietnam
