Tank Waterproofing in progress with Acrylic Max 2K

One-Stop Solution for Waterproofing Underground and Overhead Concrete Tanks – Sturdflex Acrylic Max 2K

Waterproofing is a critical aspect of construction, especially when it comes to structures like concrete tanks that are constantly exposed to moisture. In our previous blog post, we discussed various methods and best practices for waterproofing underground and overhead concrete tanks. Today, we’ll delve deeper into a specific one-stop solution that can effectively address these challenges: Sturdflex Acrylic Max 2k.

Introducing Sturdflex Acrylic Max 2k 

Sturdflex Acrylic Max 2k is a game-changer in the world of waterproofing. It is a dual-component acrylic-based waterproofing compound, consisting of a liquid solution and a powder. This unique combination results in a flexible cementitious waterproof membrane that offers exceptional resistance to UV rays and heat degradation. But what makes it stand out is its versatility, making it an ideal choice for waterproofing both underground and overhead concrete tanks, among other critical areas.

Where Acrylic Max 2k Excels

Acrylic Max 2k is a go-to solution for waterproofing various structures exposed to large volumes of water. Here’s a closer look at its applications:

Concrete Water Tanks (Underground and Overhead): Whether your tank is hidden beneath the ground or perched high above, Acrylic Max 2k provides reliable waterproofing. It creates a robust barrier against water ingress, ensuring the integrity of your tank for years to come.

Wet Areas: It’s not just limited to tanks. Acrylic Max 2k is perfect for waterproofing the walls and sunken slabs in wet areas like bathrooms, kitchens, and laundry rooms, where moisture resistance is of paramount importance.

Roofs, Terraces, and Balconies: From flat roofs to exposed terraces and balconies, Acrylic Max 2k is an excellent choice. It even covers parapet walls, offering complete protection against rain and moisture.

Swimming Pools and More: It’s not just limited to residential applications. Acrylic Max 2k is also suitable for waterproofing swimming pools, basements, retaining walls, lift pits, and a wide range of other structures that face high water exposure.

Now that we know what Acrylic Max 2K is and how it excels over other products that are used for waterproofing concrete structures exposed to water. Let’s walk you through how to use Acrylic Max 2K for waterproofing overhead and underground concrete tanks and the advantages it possesses.

How to Apply Acrylic Max 2k on Underground and Overhead Concrete Tanks 

To make the most of Acrylic Max 2k’s waterproofing capabilities, follow these application steps:

Step 1: Surface Preparation

  • Ensure the surface of the tank is fully cured and dry (generally 7 days for render and 28 days for concrete).
  • Clean the surface of the concrete tank thoroughly to remove dirt and loose particles.
  • Degrease the surface using suitable solvents, avoiding the use of acid.

Step 2: Product Application

  • Mix the liquid and powder components thoroughly using a mechanical stirrer.
  • Apply the mixture using a brush on the prepared surface of concrete tanks.
  • Add a fibreglass or cloth layer to the first coat while it’s still wet.
  • Allow the first coat to dry (approximately 12 hours) before applying a second coat.
  • Cure the membrane with a moist hessian cloth.

Following this step-by-step process will help achieve a highly compact waterproofing for both overhead and underground tanks, which is superior to the conventional waterproofing method usually used for tank waterproofing – highlighted in our last blog.

Advantage of choosing Sturdflex Acrylic Max 2K over conventional methods of Waterproofing

  1. All-Weather Waterproofing:

UV Resistance: Acrylic Max 2k is highly resistant to UV rays. This means that even in areas with intense sunlight exposure, such as overhead tanks on rooftops, the waterproofing membrane won’t degrade or weaken over time. It retains its protective qualities, keeping water out consistently.

Heat Resistance: Extreme temperatures can affect many waterproofing solutions, causing them to expand and contract, leading to cracks and vulnerabilities. Acrylic Max 2k, however, is designed to withstand temperature variations, ensuring that the waterproofing remains intact, regardless of whether it’s a scorching summer or a chilly winter.

  1. Durability and Strength:

The application of Acrylic Max 2k reinforces the structural integrity of the tank. Over time, water pressure and external factors can weaken concrete structures, potentially leading to cracks or leaks. Acrylic Max 2k enhances the tank’s longevity and resistance to wear and tear, reducing the risk of costly repairs in the future.

  1. Moisture Management:

When moisture becomes trapped within a structure, it can lead to a host of problems, including mold growth, deterioration of materials, and a weakened structure. Acrylic Max 2k allows any existing moisture within the concrete to escape as vapour. This moisture management feature helps prevent issues caused by trapped humidity, ensuring the long-term health of your tank.

  1. Time-Saving:

Acrylic Max 2k offers a relatively quick application process. It can be applied soon after concreting, saving valuable construction time. This efficiency is particularly beneficial in situations where construction timelines are tight or where you need to start using the tank or structure sooner rather than later.

  1. Non-Corrosive:

Unlike some other waterproofing compounds that may contain corrosive chemicals, Acrylic Max 2k’s chemistry is non-corrosive. This is crucial for the longevity of the rebar (reinforcing steel) used in concrete structures. Corrosion of the rebar can lead to structural weaknesses and compromise the tank’s integrity. By choosing Acrylic Max 2k, you ensure that your tank remains robust over the long term.


Sturdflex Acrylic Max 2k is not just a one-stop solution for waterproofing underground and overhead concrete tanks; it’s a comprehensive and dependable choice for various critical areas exposed to water. Its remarkable resistance to environmental elements, strengthening properties, moisture management capabilities, time-saving application, and non-corrosive nature make it a wise investment for ensuring the longevity and reliability of your concrete tanks and other water-exposed structures. Choose Acrylic Max 2k for peace of mind and long-lasting protection against water damage.