Waterproof treatment for steel

Capable of defying rain and damp

Get an all-terrain mezzanine

With our Waterproof treatment, you will keep your mezzanine as good as new, protected and rust-free. And thanks to this additional capacity, your steel parts will be protected against adverse weather conditions.


You can install your mezzanine in the open air and create multifunctional spaces, without worrying about the effects of the weather.

Tailor-made balconies
Chill-out zone
Access to second floor

Why choose waterproof treatment?

It's simple! This treatment offers many advantages that make your outdoor mezzanine even better.

Damp protection

Damp protection

Like a rust shield, it creates a barrier that protects metal parts.

Extra Durability

Extra Durability

Extends its useful life in damp or outdoor environments.

Simplified Maintenance

Simplified Maintenance

By creating a protective layer, the treatment minimises the need for regular maintenance, saving time and money.

Aesthetic improvement

Aesthetic improvement

Prevents stains and water damage, ensuring they look as good as new.

Variety of Uses

Variety of Uses

Personalise your outdoor space. You decide how you want to use the mezzanine, whether as a terrace, balcony, carport, pergola...



By keeping mezzanines in optimum condition, the waterproof treatment ensures long-lasting protection and a flawless appearance.

Bring your outdoor spaces to life! Protect your mezzanine, stairs, railings and more with our water-resistant treatment.
Ready to enjoy long-lasting spaces?

Outdoor decking:

The perfect complement to your waterproof mezzanine.

How does it work? It's simple. Outdoor Decking is laid over your mezzanine floor, creating an extra layer of protection and durability, ensuring that your outdoor space remains strong and resistant to rain and other elements of weather.

The ideal combination to ensure your mezzanine is ready for any season.

Terraza con entreplanta y tarima Tecrostar Tarima para exteriores Tecrostar

See images of real installations sent to us by our customers.

How do we achieve waterproof protection?

All these layers create what we call a "sandwich barrier", further ensuring protection against moisture and corrosion.

  • Lacquered with polyester powder coating: for a perfect finish and increased protection against corrosion.
  • Chrome passivation: We apply a chrome passivation to further increase corrosion protection. It strengthens the resistance of the parts and prolongs their service life.
  • Electrolytic zinc plating: We apply a layer of zinc at low temperature to protect the parts against corrosion.
Waterproof capas

Frequently asked questions

Applying the waterproof treatment to our products is very easy. Just contact our customer service team and they will take care of everything. They will guide you step by step and give you all the information you need to keep your products in optimal condition for longer.


The price with waterproof treatment consists of three parts:

  • Custom Colour (RAL): an increase of 15% to the base price of the product. This allows you to choose the colour of the steel parts of the mezzanine, stairs or railings.
  • Cold galvanising: a 28% increase in the order. This process provides an additional layer of protection against damp and wear and tear, prolonging the life of your products.
  • Logistical treatment: a set fee of €225. This component is essential as the product is customised and undergoes several stages of treatment, such as zinc plating and lacquering.

Remember that this investment not only protects your products, but also customises them to your preferences and ensures that they maintain their quality over time.

Of course you can! You can customise the colour of the steel parts.

The treatment is applied in several stages. The raw steel parts go through a process of zinc plating, chrome passivation and sealing. Finally, a lacquer coating with paint is applied, which allows you to choose the colour, so yes, you have the freedom to choose the final RAL colour in which your parts are painted!

At Tecrostar we understand how important bespoke design is. We are here to help you find the perfect solution for your outdoor spaces. What colour do you want for your products? Tell us and we will make it happen!

Good question! Because the parts go through a special treatment process, you may have to wait up to two months from the date you make your purchase until you receive your waterproof order. But don't worry, it will be worth the wait when you see the quality and durability of your products!

If you want your products to last longer outdoors, our recommendation is to opt for waterproof treatment, especially in dark colours such as black or anthracite grey, to ensure a longer durability of your outdoor products.

The durability of our waterproof treatment varies depending on environmental exposure and where the product is installed. Under normal low corrosion conditions, it can last for more than 10 years. It is important to note that durability is based on laboratory testing, but each actual location may involve different exposures.

See Warranty

The waterproof treatment is suitable for most environments (with the exception of very aggressive atmospheres). Its durability may vary depending on where the product is installed and the level of environmental exposure (coastal areas, urban and industrial atmospheres, high humidity...). There are different levels of durability depending on the corrosion classification of the environment.

Our treatment provides additional protection, increasing durability against corrosion-causing weather conditions - call us for more details on durability for your specific environment!

The main difference is that the decking is an extra element that is laid on top of the mezzanine wood flooring. This is because the mezzanine flooring alone does not have the appropriate properties to withstand outdoor conditions.

Outdoor decking provides an extra layer of protection and durability, ensuring that your outdoor space remains strong and resistant to rain and other elements of weather.

For total protection, we recommend purchasing the waterproof treatment and outdoor decking together. They are the ideal combination to ensure your mezzanine is ready for any season.

Back to top