The Ultimate Guide to Aerosol Top Cones & Domes: Specifications for Diameter 45mm to 70mm
2026-01-26
The safety and durability of an Aerosol Can don’t depend solely on the can body—Cones & Domes(top and bottom covers) act as the "pressure-bearing core," directly determining whether the product can withstand warehouse stacking, transportation vibrations, and even extreme environments. Many people may not notice that nearly 90% of aerosol can leaks and deformations stem from mismatched seaming between the cone and valve, or inadequate pressure resistance of the dome. With years of experience in custom tinplate Aerosol Cans, SAILON has put its Cones & Domes (ranging from 45mm to 70mm) through thousands of pressure tests. Today, we’ll break down the key specifications of these "invisible guardians."
Why has the 25.4mm opening become an industry universal standard?
Anyone who’s browsed aerosol can accessories will find that most Cones & Domes—whether 45mm or 70mm in diameter—feature a 25.4mm (1-inch) opening. This isn’t a coincidence but the "optimal solution" refined by the industry over years. More than 95% of standard aerosol valves worldwide are compatible with this size, allowing buyers to easily source matching valves and nozzles without hunting for specialized parts.
At SAILON, we’ve noticed that only 3% of clients request non-standard 20mm openings (mostly for small portable sprays). For most scenarios, the 25.4mm opening balances sealing performance and supply chain efficiency, making it the most cost-effective choice.
How to choose Cones & Domes from 45mm to 70mm?
Different diameters of Cones & Domes fit distinct use cases—choosing the right one ensures performance without unnecessary costs:
- 45mm/52mm: The "sleek option," ideal for body sprays and small Refrigerant Cans. SAILON’s cones and domes in these sizes use thin-gauge tinplate, lightweight with a smooth finish. Paired with gold or white lacquer, they perfectly complement high-end personal care packaging.
- 57mm/60mm: The "golden size" for household cleaners and air fresheners. The dome’s curved design is optimized to save material while boosting buckling pressure to 1.2Mpa, handling warehouse stacking with ease.
- 65mm/70mm: The "heavy-duty option" for industrial products and automotive care (e.g., rust removers, spray paints). These larger diameters require stronger structural support—SAILON adds three reinforcing ribs to the cones, pushing burst pressure to 1.4-1.8Mpa, even for long-term storage in high-temperature garages.
Material & Coating: Double Protection for Cones & Domes
Durability of Cones & Domes relies on both material and coating. SAILON uses high-quality 0.28-0.32mm tinplate with a thickness tolerance of less than 0.01mm, avoiding weak points during stamping.
Coating options cater to different needs:
- Clear coating: Suitable for neutral contents, cost-effective with reliable rust resistance for daily use;
- Gold/white lacquer: Enhances both aesthetics and rust protection, perfect for industrial cans or outdoor-use products;
- Special inner coating: Customized for acidic or corrosive contents, preventing internal erosion of the cones and domes.
Selection Quick Reference Table
| Can Diameter | Recommended Usage | Standard Opening | Pressure Rating (Reference) |
|---|---|---|---|
| 45mm/52mm | Personal Care, Small Refrigerant Cans | 25.4mm | 1.2Mpa |
| 57mm/60mm | Household Cleaners, Air Fresheners | 25.4mm | 1.2Mpa |
| 65mm/70mm | Industrial Products, Automotive Care | 25.4mm | 1.4-1.8Mpa |
Frequently Asked Questions
- Q: Do production lead times vary for different diameters of Cones & Domes? A: SAILON keeps stock of popular sizes (45mm, 52mm, 65mm), with delivery in 3-5 days. Non-standard sizes or custom coatings take 7-10 days—20% faster than the industry average.
- Q: Will the lacquer coating peel off? A: Under normal use, peeling is unlikely. SAILON’s lacquer undergoes 200℃ high-temperature curing and adhesion testing—tape peeling won’t remove the coating. However, deliberate scratching with sharp objects may cause damage.
- Q: Can I customize special-shaped Cones & Domes? A: Absolutely. SAILON’s professional mold development team can create custom designs with specific drawings and use cases. Note that custom molds require a minimum order quantity—feel free to contact our engineers for details.
Choosing Cones & Domes may seem simple, but it involves crucial details. Every aspect—diameter, pressure resistance, coating—impacts the final product experience. SAILON believes good accessories should "serve invisibly," letting users trust every spray without noticing the components. If you’re unsure about selection, reach out to SAILON’s technical team—we’ll recommend the perfect Cones & Domes solution based on your product needs.