IP68 Rating for Advertising Signage: Meaning & Real-World Applications

1. What Is the IP68 Rating for Advertising Signage? Breaking Down Each Number

The IP68 rating for advertising signage represents the highest level of protection within the IP (Ingress Protection) classification system under the IEC 60529 standard. It certifies that a device is completely dustproof and capable of withstanding continuous submersion in water at depths of 1.5 metres or greater for extended periods - typically from 30 minutes to several hours, depending on the manufacturer's specifications.

The IP code is structured around two digits:

• First digit (6): Represents dust protection. Level 6 is the maximum rating, meaning the device is fully sealed against the ingress of dust, sand, and ultrafine particles - 100% protection.
• Second digit (8): Represents water protection. Level 8 confirms that the device can operate normally even when submerged in water at depths exceeding 1 metre for extended durations, as specified by the manufacturer.

In summary: IP68 = complete dustproofing + sustained deep-water submersion resistance. This standard is appropriate for signage installations in locations subject to particularly harsh weather conditions or flood risk.

Not everyone knows about the IP68 rating for billboards

2. Practical Applications: When Is IP68 Required?

The IP68 rating for advertising signage is not always necessary, but in the following situations it becomes an essential requirement to protect a long-term investment:

• Coastal and riverside signage: Salt-laden air combined with high humidity and constant water spray is highly corrosive. IP65 may suffice in the first year, but from the second year onwards, moisture and salt gradually penetrate and corrode electrical circuits. IP68 ensures LED modules and control units operate reliably for 8–10 years with minimal maintenance.
• Seasonally flood-prone areas: Many streets in Hanoi, Ho Chi Minh City, and central urban areas can experience flooding of 30–80 cm during the rainy season. Ground-level signage, low-mounted posts, and roadside advertising columns require IP68 to prevent LED modules and power supplies from being damaged during inundation.
• Decorative fountains, ornamental ponds, and underpasses: These represent the most typical IP68 applications - underwater decorative LED lighting, civil tunnel illumination, and directional signage systems in pedestrian underpasses all require full waterproofing to this standard.
• Signage at airports and stations near high-pressure floor washing areas: Industrial cleaning equipment using pressure washers can exceed the protective capability of IP65. IP68 ensures equipment remains safe in high-intensity cleaning environments.

3. Why Does Advertising Signage Need to Meet the IP68 Standard?

Outdoor advertising signage faces countless threats from the natural environment. Achieving the IP68 rating delivers significant advantages:

• Withstanding Harsh Weather Conditions: Vietnam's tropical monsoon climate - with intense downpours and storm flooding - presents a serious challenge. With IP68 certification, advertising signage will not short-circuit or suffer electrical failure even during prolonged heavy rain or localized flooding at the installation site.
• Keeping Out Dust and Insects: Fine dust not only obscures display content but also accumulates inside circuit boards over time, causing overheating and component failure. The IP68 rating ensures the internal housing remains clean, allowing the thermal management system to operate more efficiently.
• Extending Lifespan and Reducing Maintenance Costs: Repairing outdoor advertising signage - particularly large-format LED screens installed at height - is both costly and hazardous. Investing in IP68-rated equipment from the outset can save tens of millions of dong in component replacement and periodic maintenance expenses.

Outdoor billboards need to have a high IP rating

4. Frequently Asked Questions About the IP68 Rating for Advertising Signage

- Is IP68 more durable than IP65 in typical Vietnamese outdoor conditions?

In standard outdoor conditions without flooding risk, IP65 already provides sufficient protection for most signage. IP68 only demonstrates a clear advantage when the installation is located in a flood-prone area, exposed to fast-flowing water, or subject to harsh salt-air environments.

- Does the IP68 rating apply to the entire sign or only the LED components?

IP68 is a rating assigned to individual components, not to the sign as a whole. During the consultation process, the contractor must specify the rating for each part separately - LED modules, power supplies, and cable connectors must all meet IP68 for the overall system to be considered compliant.

- Is IP68-rated signage significantly more expensive than IP65?

Component costs for IP68 are typically 20–40% higher than for IP65, depending on the product range. However, when installed in locations where the higher rating is genuinely warranted, maintenance costs and water-damage component replacements are significantly reduced - resulting in a lower total lifecycle cost for the project.

- Does Tien Du Light undertake outdoor signage projects requiring IP68?

Yes. Tiến Dư Light has completed numerous coastal signage installations, chain signage projects in frequently flooded areas, and decorative underwater lighting systems for fountains. Contact us directly at tiendulight.com for project-specific consultation.

A clear understanding of the IP68 rating for advertising signage enables clients to make well-informed investment decisions - avoiding unnecessary expenditure on a higher standard than required, while also avoiding false economies that lead to premature system failure. If you are planning a signage project in a specialized location, contact Tiến Dư Light for detailed consultation at tiendulight.com.