The elementary monomer structure of acrylic acid

The Science of Acrylic and Its Role in Waterproofing

Waterproofing is a crucial requirement in many industries and applications to protect structures and materials from water damage. Acrylic-based waterproofing systems have emerged as popular choices due to their excellent waterproofing properties, ease of application, and versatility. This research article provides a comprehensive review of the science behind acrylic and its role in waterproofing. It delves into the chemical composition, physical properties, and mechanisms of acrylic-based waterproofing, along with its diverse applications and advantages. Furthermore, it explores the emerging trends and future prospects in this field of Acrylic.

What is Acrylic? 

Acrylic is derived from acrylic acid, a monomer that undergoes a polymerization process to form acrylic polymers. These polymers are composed of long chains of repeating acrylic units. Acrylic polymers can be formulated in different ways to achieve desired properties such as flexibility, durability, and water resistance.

Understanding Acrylic Composition and Structure

Acrylic polymers, commonly used in waterproofing applications, have a specific composition and structure that contribute to their unique properties. Let’s delve into the details of acrylic composition and structure:


Acrylic polymers are derived from a monomer called acrylic acid (CH2=CHCOOH). Acrylic acid is a colourless liquid with a pungent odour. It is a carboxylic acid that contains a double bond between two carbon atoms (denoted as CH2=CH). This double bond is crucial for the polymerization process, which forms the acrylic polymer chains.


Polymerization is the process by which monomers join together to form long chains or networks, creating a polymer. Acrylic acid undergoes a process called radical polymerization. Initiators, such as peroxides or azo compounds, generate free radicals that react with acrylic acid monomers. These free radicals initiate a chain reaction, where the monomers link together, forming polymer chains. The double bond in acrylic acid opens up, and the resulting chains consist of repeating acrylic units.

Acrylic Units

The repeating unit in acrylic polymers is known as the acrylic unit. It is derived from the acrylic acid monomer and has the following chemical structure: CH2=CHCOO-. The double bond is opened up during polymerization, and the carboxyl group (COOH) is transformed into a carboxylate group (COO-). The negative charge on the carboxylate group allows the polymer to be water-soluble, making it easier to process and formulate into coatings, adhesives, or sealants.


Acrylic polymers can be formed not only from acrylic acid but also from other monomers. Copolymerization involves the polymerization of two or more different monomers together. By introducing other monomers, such as methyl methacrylate (MMA) or butyl acrylate (BA), into the polymerization process, the properties of the acrylic polymers can be tailored to meet specific requirements. For example, the addition of MMA can enhance the hardness and impact resistance of the resulting copolymer, while BA can improve flexibility and adhesion.

Molecular Weight

The molecular weight of acrylic polymers can vary depending on the polymerization conditions and the desired application. Molecular weight affects various properties of the polymer, including its viscosity, film-forming capabilities, and mechanical strength. Higher molecular weight acrylic polymers typically have greater viscosity and film-forming properties, making them suitable for thick coatings or membranes, while lower molecular-weight acrylics may be used for more flexible applications.


Acrylic polymers can be further modified through crosslinking, a process in which the polymer chains are chemically bonded together. Crosslinking enhances the polymer’s strength, durability, and resistance to solvents and chemicals. It can be achieved through various methods, such as adding crosslinking agents or exposing the acrylic coating to heat, ultraviolet (UV) light, or moisture. Crosslinked acrylic polymers exhibit improved waterproofing properties and are commonly used in applications where enhanced performance is required.

Now that we know about the composition and structure of acrylic, let’s dive into the physical properties of acrylic.

Physical Properties of Acrylic 

Acrylic, a versatile synthetic polymer, possesses a range of physical properties that make it suitable for a wide array of applications. Let’s explore the detailed physical properties of acrylic:

Transparency and Clarity

Acrylic exhibits exceptional optical clarity, allowing it to transmit light almost as efficiently as glass. It has excellent transparency, enabling a high degree of light transmission without significant distortion or colouration. This property makes acrylic a popular choice for applications such as windows, skylights, signage, and displays.

Impact Resistance 

Acrylic is highly resistant to impact compared to glass. It is more than 10 times stronger than a glass of the same thickness, making it less prone to breakage or shattering. Acrylic’s impact resistance is particularly valuable in applications where safety is a concern, such as in protective barriers, safety glazing, and outdoor signage.


Acrylic is a flexible material, allowing it to withstand bending and deformation without breaking. Its inherent flexibility makes it suitable for applications that require shaping, such as curved windows, domes, and complex architectural designs. Acrylic sheets can be thermoformed or moulded into various shapes, providing versatility in design and manufacturing processes.


Acrylic is significantly lighter than glass, making it easier to handle, transport, and install. Its lower weight contributes to reduced structural load and allows for more efficient and cost-effective installations. This property is particularly advantageous in applications such as aircraft windows, automotive components, and lightweight structures.

Chemical Resistance

Acrylic demonstrates good resistance to a wide range of chemicals, including acids, alkalis, and solvents. It is less susceptible to chemical degradation or corrosion compared to many other materials. This property makes acrylic suitable for applications exposed to various chemical environments, such as chemical storage tanks, laboratory equipment, and protective coatings.


Acrylic has excellent weathering properties, enabling it to withstand prolonged exposure to sunlight, UV radiation, and environmental elements. It retains its transparency and mechanical strength even after prolonged outdoor use. Acrylic’s weatherability makes it suitable for outdoor signage, architectural applications, and protective glazing.

Thermal Stability

Acrylic has good thermal stability, allowing it to maintain its physical properties across a wide temperature range. It has a high glass transition temperature, typically around 100°C (212°F), which means it remains rigid and stable at normal ambient temperatures. Acrylic’s thermal stability enables its use in applications subjected to varying temperature conditions.

Electrical Insulation

Acrylic is an excellent electrical insulator, meaning it resists the flow of electric current. It has a high dielectric strength, making it suitable for electrical and electronic applications where insulation is crucial. Acrylic is commonly used in electrical enclosures, insulating components, and display screens.

Water Resistance

Acrylic inherently exhibits good water resistance. It has a low water absorption rate, which means it is less likely to absorb water and become waterlogged. This property is valuable in applications that require moisture resistance, such as outdoor signage, bathroom fixtures, and marine applications.


Acrylic is a highly machinable material, allowing it to be easily cut, drilled, routed, and polished. It can be worked using common woodworking tools, making fabrication and customization relatively straightforward. Acrylic’s machinability contributes to its popularity in various industries, including signage, displays, and architectural applications.

Now that we have an in-depth knowledge of the various properties of acrylic, let’s dive into the mechanism of acrylic-based waterproofing.

Mechanisms of Acrylic-Based Waterproofing 

Acrylic-based waterproofing systems employ various mechanisms to provide effective protection against water intrusion. These mechanisms can be categorized into three main processes: film formation, adhesion, and chemical resistance. Let’s explore each mechanism in detail:

Film Formation

Acrylic-based waterproofing systems often involve the application of a liquid coating or the installation of a membrane. The primary mechanism behind their waterproofing capability is the formation of a continuous film that acts as a physical barrier against water penetration.

When an acrylic coating is applied, the liquid formulation undergoes a curing process, typically through solvent evaporation or chemical reaction. As the solvent evaporates or the chemical components react, the acrylic polymers in the formulation come together, forming a solid film on the surface. This film effectively seals the substrate, preventing water molecules from passing through.

In the case of acrylic membranes, pre-formed sheets or liquid-applied products are used. The membranes are applied to the substrate, and they adhere to the surface to create a continuous waterproof layer. The membrane’s thickness and integrity ensure that water cannot penetrate through to the underlying substrate.


Acrylic-based waterproofing systems exhibit excellent adhesion to a variety of substrates, such as concrete, metal, wood, and plastic. Adhesion is crucial to ensure that the coating or membrane remains securely bonded to the surface and maintains its waterproofing effectiveness.

Acrylic coatings typically contain adhesive agents or additives that enhance their bonding properties. These agents improve the interaction between the coating and the substrate, promoting a strong and durable bond. Acrylic membranes are designed to adhere effectively to the substrate, ensuring long-term adhesion and preventing water from seeping underneath the membrane.

The adhesion of acrylic-based waterproofing systems helps create a cohesive and continuous barrier, preventing water from finding pathways or gaps to penetrate through the surface.

Chemical Resistance 

Acrylic-based waterproofing systems often incorporate chemical additives to enhance their resistance to various factors, including water, chemicals, UV radiation, and environmental pollutants.

Water Resistance: Acrylic polymers inherently exhibit low water absorption, reducing the likelihood of water seepage. The polymer chains are not easily permeable to water molecules, helping to maintain the integrity of the waterproofing system.

Chemical Resistance: Acrylic-based formulations can be engineered to resist chemical degradation. Additives or cross-linking agents can be incorporated into the formulation to enhance chemical resistance, protecting the waterproofing system from the potentially damaging effects of acids, alkalis, solvents, and other corrosive substances.

UV Resistance: Acrylic coatings and membranes can be formulated with UV-resistant additives. These additives help to mitigate the degrading effects of ultraviolet radiation from the sun. UV resistance prevents the coating or membrane from deteriorating, maintaining its waterproofing properties over an extended period.

Now that we understand how acrylic functions in a waterproofing environment, let’s walk you through the various application of acrylic waterproofing.

Acrylic Waterproofing Applications

Acrylic waterproofing applications encompass a wide range of industries and structures where water intrusion protection is essential. Let’s explore some of the different applications of acrylic waterproofing:

Roofs and Terrace Waterproofing 

Acrylic-based waterproofing coatings and membranes are commonly used to protect roofs and terraces from water penetration. These systems provide a seamless, flexible, and durable waterproofing layer that safeguards the underlying structure. Acrylic coatings can be applied to various roofing materials, including concrete, metal, asphalt, and bitumen, offering effective protection against leaks, cracks, and deterioration caused by water.

Basement Waterproofing

Basements are susceptible to water infiltration due to their below-ground-level positioning. Acrylic waterproofing coatings and membranes are employed to create a reliable barrier against water seepage into the basement. These systems can be applied to basement walls and floors to prevent moisture intrusion, mold growth, and damage to stored items or structural integrity.

Bathroom and Wet Areas Waterproofing 

In areas exposed to high moisture and water usages, such as bathrooms, showers, and wet rooms, acrylic waterproofing plays a vital role. Acrylic-based coatings are used to create a waterproof barrier on walls, floors, and even around plumbing fixtures. This prevents water from seeping into the building structure, protecting against potential water damage, mold growth, and degradation of the building materials.

Swimming Pool and Water Features Waterproofing 

Acrylic-based waterproofing systems are employed in the construction and maintenance of swimming pools, water fountains, and other water features. These systems create a watertight seal, preventing leaks and seepage. Acrylic coatings and membranes offer excellent adhesion to various pool surfaces, including concrete, tiles, and fibreglass, ensuring long-lasting waterproofing and protection against water-related issues.

Bridge and Infrastructure Waterproofing 

Acrylic waterproofing is utilized in the protection of bridges, tunnels, and other infrastructure exposed to harsh environmental conditions. The coatings and membranes act as a protective barrier, preventing water ingress that can lead to corrosion, concrete degradation, and structural weakening. Acrylic waterproofing systems help extend the lifespan of these structures by mitigating water-related damage.

Concrete Structures and Expansion Joints 

Acrylic waterproofing is applied to concrete structures, such as foundations, retaining walls, and parking decks, to enhance their resistance to water penetration. These coatings provide a seamless and flexible membrane that guards against water infiltration, cracks, and spalling. Acrylic-based sealants are also commonly used in expansion joints to ensure water resistance while accommodating movement and thermal stresses.

Exterior Wall Coatings 

Acrylic waterproof coatings are used as protective layers for the exterior walls of buildings. These coatings not only provide waterproofing but also enhance the appearance of the building and protect against weathering and UV radiation. Acrylic coatings can be tinted to different colours, offering aesthetic options while maintaining the integrity of the building envelope.

Flat Roof Gardens

Acrylic waterproofing systems are employed in the construction of flat roof gardens or green roofs. These systems create a waterproof barrier that prevents water from seeping into the building structure while providing a suitable substrate for vegetation. Acrylic-based coatings and membranes allow for the successful implementation of green roof projects by ensuring water tightness and protecting the underlying structure.

These are just a few examples of the diverse applications of acrylic waterproofing. Acrylic-based coatings, membranes, and sealants find use in various industries and structures to provide effective protection against water intrusion, contributing to the longevity, durability, and integrity of buildings and infrastructure. Now that we have a detailed view of the application of acrylic, let’s walk you through the various advantages, it provides in a waterproofing environment.

Advantages of Acrylic Waterproofing 

Acrylic waterproofing offers numerous advantages that make it a popular choice for protecting structures against water intrusion. Here are some of the key advantages of acrylic waterproofing:

Excellent Waterproofing Capability 

Acrylic-based waterproofing systems form a seamless and continuous barrier that effectively prevents water penetration. They create a durable and reliable waterproofing layer that safeguards the underlying structures from moisture-related damage, such as leaks, mold growth, and deterioration.


Acrylic waterproofing systems exhibit flexibility, allowing them to accommodate structural movements and temperature fluctuations without cracking or compromising their waterproofing properties. This flexibility ensures long-term performance and durability, even in dynamic environments.

Easy Application

Acrylic waterproofing coatings and membranes are relatively easy to apply, making them suitable for both new construction projects and repair works. They can be applied using various methods, including brush, roller, or spray application, providing flexibility and convenience during the installation process.

Fast Drying and Curing 

Acrylic-based waterproofing materials typically have fast drying and curing times, allowing for quick project completion. This rapid drying time reduces the risk of contamination or damage during the curing process and enables faster re-coating or installation of additional layers.

UV Resistance 

Acrylic waterproofing systems can be formulated with UV-resistant additives, providing protection against the damaging effects of sunlight. This UV resistance helps to maintain the integrity and appearance of the waterproofing layer, preventing premature degradation and ensuring long-term performance.


Acrylic waterproofing systems are versatile and can be applied to various substrates, including concrete, metal, wood, and plastics. They can be used in a wide range of applications, such as roofs, basements, bathrooms, swimming pools, and exterior walls. The versatility of acrylic waterproofing makes it suitable for diverse construction and waterproofing projects.

Good Adhesion 

Acrylic coatings and membranes exhibit excellent adhesion to different substrates, providing a strong bond between the waterproofing layer and the surface. This strong adhesion ensures that the waterproofing system remains securely attached to the substrate, even under challenging environmental conditions.

Chemical Resistance 

Acrylic-based waterproofing systems demonstrate good resistance to a variety of chemicals, including acids, alkalis, and solvents. This chemical resistance helps protect the waterproofing layer from degradation and maintains its effectiveness in harsh chemical environments.


Acrylic waterproofing systems offer a cost-effective solution for waterproofing projects. They are generally more affordable compared to other waterproofing materials, such as specialized membranes or coatings. Additionally, their ease of application and fast curing times contribute to time and labour savings, making them a cost-efficient option.

Aesthetic Options 

Acrylic coatings can be tinted to different colours, allowing for aesthetic customization and integration with the overall building design. This feature is particularly beneficial for exterior wall coatings or flat roof gardens, where both waterproofing performance and visual appeal are desired.

With these advantages, we come to an end of our understanding related acrylic in today’s context. Now let’s walk you through what the future of acrylic looks like – as we grow in technology related to waterproofing solutions.

Emerging Trends and Future Prospects 

Acrylic waterproofing is continually evolving to meet the changing demands of the construction industry and advancements in materials and technology. Several emerging trends and future prospects can be observed in the field of acrylic waterproofing:

Sustainable Formulations

With the increasing focus on sustainability and environmental responsibility, the future of acrylic waterproofing lies in the development of more eco-friendly formulations. There is a growing demand for acrylic products that have reduced volatile organic compound (VOC) content, lower environmental impact and are derived from renewable resources. Manufacturers are exploring alternative raw materials and manufacturing processes to create sustainable acrylic waterproofing solutions.

Enhanced Performance 

Future advancements in acrylic waterproofing will likely focus on improving performance characteristics. This includes developing coatings and membranes with enhanced durability, longer service life, and improved resistance to extreme weather conditions, UV radiation, and chemical exposure. The goal is to provide highly effective waterproofing solutions that can withstand the demands of modern construction practices and maintain their performance over extended periods.

Breathable Acrylic Systems

While acrylic is known for its non-breathable nature, there is a growing demand for breathable waterproofing systems that can effectively manage moisture while still providing reliable protection against water intrusion. Future developments may involve incorporating breathable additives or technologies into acrylic formulations to allow the passage of water vapour while preventing liquid water penetration.

Smart Waterproofing Solutions 

The integration of smart technologies into building systems is a rising trend, and acrylic waterproofing is no exception. Future prospects may involve the development of smart acrylic waterproofing systems that can monitor and detect water leaks or structural vulnerabilities in real time. This can enable proactive maintenance and timely interventions to prevent water-related damage and ensure the longevity of structures.

Self-healing Properties 

Researchers and manufacturers are exploring the incorporation of self-healing capabilities into acrylic waterproofing systems. This involves integrating microcapsules or other healing agents into the coating or membrane, which can release and repair cracks or damage when triggered by external factors. Self-healing acrylic waterproofing systems have the potential to enhance the longevity and performance of waterproofing layers by automatically repairing minor damages.

Integration with Energy Efficiency Measures 

The future prospect of acrylic waterproofing involves its integration with energy efficiency measures. This includes developing coatings or membranes that contribute to thermal insulation and reducing energy consumption for heating and cooling. Additionally, acrylic-based coatings can be designed to reflect sunlight and reduce heat absorption, helping to improve the energy efficiency of buildings and reduce the urban heat island effect.

Digitalization and Data-driven Solutions 

The adoption of digital technologies and data-driven solutions is transforming the construction industry. Acrylic waterproofing can benefit from digitalization through tools such as predictive modelling, performance simulations, and real-time monitoring. These technologies can assist in optimizing waterproofing design, improving installation processes, and providing data-driven insights for maintenance and performance assessment.


The integration of nanotechnology in acrylic materials offers various benefits and possibilities for enhancing their properties and expanding their applications. Nanotechnology involves working with materials and structures at the nanoscale, typically ranging from 1 to 100 nanometers. By incorporating nanoscale additives or modifying the structure of acrylic at this level, several improvements can be achieved. Here are a few examples:

Strength and durability: Nanoparticles, such as silica or carbon nanotubes, can be added to acrylic to enhance its mechanical strength, hardness, and toughness. This reinforcement at the nanoscale helps to improve the material’s resistance to scratches, impacts, and general wear and tear.

Transparency and optical properties: Acrylic is known for its excellent optical clarity, and nanotechnology can further enhance these properties. By dispersing nanoparticles with specific optical properties, such as quantum dots or metallic nanoparticles, within the acrylic matrix, it is possible to manipulate light transmission, absorption, and reflection, leading to applications in optics, displays, and sensors.

Anti-reflective coatings: Nanoscale coatings can be applied to acrylic surfaces to reduce unwanted reflections and glare. These coatings consist of thin layers of materials with specific refractive indexes, designed to cancel out or minimize reflections, resulting in improved visibility and optical performance.

Self-cleaning surfaces: Nanotechnology can enable the creation of self-cleaning acrylic surfaces. By incorporating nanoparticles with hydrophobic or photocatalytic properties, the surface can repel water, dirt, and contaminants. Additionally, photocatalytic nanoparticles can harness light energy to break down organic matter on the surface, keeping it clean with minimal maintenance.

Anti-fog coatings: Acrylic surfaces tend to fog up when exposed to temperature or humidity changes. However, nanotechnology allows for the development of anti-fog coatings. These coatings can be applied to the acrylic surface and work by reducing surface tension and promoting the formation of a thin, continuous film of water, preventing fogging and ensuring clarity.

Antibacterial properties: Acrylic surfaces, when modified with antimicrobial nanoparticles, can exhibit improved resistance against the growth of bacteria and other microorganisms. This is particularly useful in healthcare settings, where acrylic materials are commonly used in medical devices, equipment, and surfaces


This research article aims to provide an in-depth exploration of the science behind acrylic and its significance in waterproofing applications. It investigates the chemical composition and structural aspects of acrylic, elucidates the physical properties relevant to waterproofing, and examines the underlying mechanisms of acrylic-based waterproofing systems. Furthermore, the article discusses the wide-ranging applications and benefits of acrylic waterproofing. It also highlights emerging trends and future prospects in the field, such as the integration of nanotechnology and sustainable solutions. By offering a comprehensive analysis, this research article contributes to the understanding of acrylic-based waterproofing and its role in diverse industries.