7 Methods of Cementitious Waterproofing with Pros and Cons

Written By Adam Paul - Waterproofing Expert

Cementitious waterproofing is a rigid, cement-based solution that is easy to apply on the concrete surface. Cementitious waterproofing can be applied on the surface in 6 different ways. Applying cementitious waterproofing in different techniques helps to maximize the efficiency of the layer and minimize the cost, labor, and curing time. These are the most used 7 methods of cementitious waterproofing techniques.

Slurry method
Dry shake method
Trowel method
Spray method
Brush or roller method
Integral waterproofing method
Crack injection method

Aqviz, we highly recommend you to use the brush or roller method for the homeowners you does small DIY projects. You can use integral cementitious waterproofing as a long-lasting waterproofing solution. As well as you can use spray cementitious waterproofing for quick and effective waterproofing techniques.

1. Slurry Method

The slurry method is a simple and effective cementitious waterproofing technique. It consists of a cement-based slurry composed of cement, water, and waterproofing additives. The cementitious slurry can be coated on the concrete surface using a brush, roller, or spray.

Aqviz, we highly recommend this method for interior spaces where water exposure is common but structural movement is minimal. You can apply the cementitious slurry waterproofing method on concrete surfaces in bathrooms, basements, water tanks, and swimming pools.

The slurry method is a cost-effective cementitious waterproofing method that requires minimal labor and time. This method is typically used for 1-2 mm thickness layer. Normally 2 coats are required for this method. Due to the thickness of this method layer can be cured within the minimum time period. It helps to increase the efficiency of the task.

Pros of the cementitious slurry waterproofing method

The cementitious slurry waterproofing method can be applied more user-friendly using a brush, roller, or spray.
The cementitious slurry waterproofing method requires fewer resources compared to thicker cementitious waterproofing systems
The cementitious slurry waterproofing method takes only 24–48 hours, whereas other cementitious waterproofing systems may require longer curing periods
The cementitious slurry waterproofing method helps to adhere effectively to uneven concrete surfaces without extensive surface preparation

Cons of cementitious slurry waterproofing method

The cementitious slurry waterproofing method is less flexible and elastic.
Slurry method cementitious layers will not last long as polymer-modified cementitious waterproofing under heavy water pressure
The cementitious slurry waterproofing method provides only 1–2 mm of protection, whereas some other cementitious waterproofing systems offer greater thickness for enhanced durability
The cementitious slurry waterproofing method may degrade faster under extreme weather conditions compared to other cementitious waterproofing options

2. Dry Shake Method

The dry shake method is a cementitious waterproofing technique where a dry waterproofing powder is sprinkled onto fresh concrete and then troweled into the surface. This method integrates waterproofing components directly into the concrete, forming a dense, durable, and abrasion-resistant layer.

We recommend this method for industrial and commercial spaces where high durability and resistance to wear are required. It is commonly used on industrial floors, parking decks, exterior slabs, and warehouses.

The cementitious dry shake waterproofing method requires moderate labor with proper time management. Because cementitious powder must be applied on the concrete surface on time when the surface is fresh. It is a mid-range cost option considering both material and labor expenses. This method helps to have up to 3 mm of thickness. providing enhanced surface protection. The curing time is 2-5 days, which is the same as the concrete curing period.

Pros of cementitious dry shake waterproofing method

Cementitious Dry Shake waterproofing is highly durable recommended for high-traffic areas
Cementitious Dry Shake waterproofing provides excellent protection against heavy loads and impact
Cementitious Dry Shake waterproofing bonds permanently with the concrete substrate, reducing the risk of delamination
Cementitious Dry Shake waterproofing has a low maintenance

Cons of cementitious dry shake waterproofing method

Cementitious Dry Shake waterproofing must be applied precisely during the fresh concrete stage, requiring careful coordination
Cementitious Dry Shake waterproofing cannot be used on vertical or overhead applications
Cementitious Dry Shake waterproofing requires skilled labor
If Dry shake cementitious waterproofing not applied uniformly, it may result in inconsistent waterproofing and weak spots on the surface

3. Trowel Method

The trowel method is a heavy-duty cementitious waterproofing application technique where a thick cementitious paste is hand-troweled onto surfaces to create a durable, high-strength protective layer. This method is ideal for applications requiring thicker waterproofing and enhanced crack-bridging properties on the concrete surface. Aqviz recommends the trowel method for vertical walls, foundations, and below-grade structures, where resistance to water pressure is crucial. Hence you can efficiently use this in basements, retaining walls, tunnels, and underground structures.

This method involves high labor demand due to the manual application process, making it more expensive compared to thinner cementitious waterproofing systems. The required thickness of the trowel cementitious waterproofing method ranges from 5–10 mm.

Pros of the trowel cementitious waterproofing method

The trowel cementitious waterproofing method provides a thicker, more durable waterproofing layer
The trowel cementitious waterproofing method effectively seals minor cracks and surface imperfections
The trowel cementitious waterproofing method can be applied to uneven or contoured surfaces
The trowel cementitious waterproofing method offers greater durability compared to thinner waterproofing methods

Cons of trowel cementitious waterproofing method

Trowel cementitious waterproofing method requires skilled workers and manual effort, increasing application time
Trowel cementitious waterproofing method takes 3–7 days, longer than the slurry or dry shake methods
Trowel cementitious waterproofing method, improper preperation can lead to poor adhesion and reduced effectiveness
Trowel cementitious waterproofing method is not suitable for moving substrates

4. Spray Method

The spray method is a cementitious waterproofing technique where a cement-based waterproofing mixture is mechanically sprayed onto surfaces using specialized equipment. This method provides a uniform and seamless waterproofing layer, making it ideal for large-scale applications.

Spray cementitious waterproofing techniques is highly recommended for large areas that require quick and efficient coverage, such as swimming pools, tunnels, retaining walls, and water treatment plants. Spray cementitious waterproofing is particularly beneficial for irregular or contoured surfaces, where manual application may be challenging.

The cost of spray cementitious waterproofing is moderate due to the use of spray machines. The thickness of the cementitious waterproofing layer can be adjusted easily due to the use of spray.

Pros of cementitious spray waterproofing

Cementitious spray waterproofing covers large areas quickly, reducing project timelines
Cementitious spray waterproofing provides a uniform layer, minimizing application inconsistencies
Cementitious spray waterproofing easily adheres to contoured, uneven, or curved structures
Cementitious spray waterproofing is ideal for both small and large-scale projects

Cons of Cementitious spray waterproofing

Cementitious spray waterproofing requires specialized machinery, increasing upfront costs
Cementitious spray waterproofing material loss due to spraying inefficiencies
Cementitious spray waterproofing requires experienced workers for proper application
Cementitious spray waterproofing, improper prep, can lead to poor adhesion and performance

5. Integral Waterproofing Method

The integral waterproofing method involves adding waterproofing admixtures directly into the concrete mix during batching. These admixtures modify the concrete’s properties, reducing its porosity and permeability to prevent water penetration from within. Unlike surface-applied waterproofing methods, integral waterproofing provides built-in protection throughout the entire concrete structure.

Aqviz recommends this method for new construction projects, particularly for foundations, slabs, reservoirs, water tanks, and underground structures where long-term waterproofing is required. After the waterproofing is integrated into the mix, no additional layers or coatings are needed after placement.

This cementitious waterproofing technique requires low labor because it is simply added during the concrete mixing process, eliminating the need for separate waterproofing applications. The initial cost is slightly higher due to admixture pricing. Integral cementitious waterproofing method is cost-efficient in the long run by reducing maintenance and repair costs. There is no specific thickness for this layer as well as its curing time it the same as the curing time of the concrete.

Pros of the cementitious integral waterproofing method

Integral cementitious waterproofing method provides a permanent protection
Integral cementitious waterproofing method does not require any external application layer
Integral cementitious waterproofing method enhances concrete density, preventing water ingress
Integral cementitious waterproofing technique is time-saving

Cons of the cementitious integral waterproofing method

The cementitious integral waterproofing method only suitable for new concrete
Cementitious integral waterproofing does not prevent cracks from forming due to structural movement
Admixture should be carefully selected for the concrete types
Performance depends on the proper mixing, dosage, and mixing methods

6. Brush or Roller Method

The brush or roller method is a simple cementitious waterproofing technique applied manually using brushes or rollers, similar to painting. This method is commonly used for light-duty waterproofing and small-scale applications.

We recommend this method for homeowners who have small areas to be repaired like balconies, residential walls, and areas with mild water exposure.

This is an excellent DIY cementitious waterproofing technique. Without heavy tools, labor and costs. The layer thickness can be varied with the application method, and the nature of the surface.

Pros of cementitious brush or roller waterproofing technique

Highly recommended for small repairs and maintenance
No special tools required
Applying cementitious waterproofing using a brush or roller requires lower material and labor costs compared to spray or trowel methods
Easy to apply without major surface preparation

Cons of the cementitious brush or roller waterproofing technique

Requires several layers for sufficient protection
Provides a lighter waterproofing layer compared to trowel or dry shake methods
May not withstand constant water pressure or heavy exposure
Not suitable for high-stress areas

7. Crack Injection Method

The crack injection method is a cementitious waterproofing technique where cementitious grout or epoxy is injected into cracks to seal leaks and restore structural integrity. This method is used to repair existing cracks in concrete surfaces, preventing further water intrusion and potential damage.

You can use the crack injection cementitious waterproofing method for repairing cracks in walls, joints, and foundations. It is particularly useful for stopping active leaks in basements, underground structures, and retaining walls. Since it targets specific problem areas, it is an effective localized waterproofing solution.

The crack injection method requires highly skilled labor, as improper application can lead to incomplete sealing or secondary cracking. The cost varies from moderate to high, depending on the crack size, depth, and material used.

Pros of cementitious crack injection waterproofing method

Specifically seals existing cracks, preventing water infiltration
Helps to stabilize weakened concrete and prevents further damage
Can be used for moving or leaking cracks
Provides durable waterproofing when applied correctly

Cons of cementitious crack injection waterproofing method

Difficult to apply in hard-to-reach cracks or narrow spaces
Improper application can lead to leaks or failure
Requires careful handling to prevent material overflow and contamination
Not suitable for full-surface waterproofing

What is the Meaning of Cementitious Waterproofing?

Cementitious waterproofing is a waterproofing technique that uses cement-based coatings, slurries, or admixtures to create a water-resistant barrier on concrete and masonry surfaces. It is one of the most commonly used waterproofing methods in construction due to its durability, affordability, and ease of application.

This type of waterproofing consists of cement, sand, silica-based materials, and special waterproofing additives that improve water resistance, adhesion, and crack-bridging properties. When applied to surfaces, cementitious waterproofing forms a solid, seamless layer that protects structures from water penetration, moisture damage, and seepage.

Cementitious waterproofing is available as mainly 5 types. These 5 Types of Cementitious Waterproofing should be application method is slightly different from each other. For the best practise we recommend you to use manufacture’s guideline.

How Do You Mix Cementitious Waterproofing?

You can mix cementitious waterproofing by following the below 6 steps.

Gather materials & tools
Measure the components accurately
Mix gradually to avoid lumps
Let the mixture rest (slaking time)
Check consistency & adjust if needed
Use the mixture within the pot life

We highly recommend you to use these Waterproofing Tools for your waterproofing project. It will increase efficient and will help to maintain the quality of the work.

What is the Ratio of Water to Cementitious Material?

The water-to-cementitious material ratio varies depending on the type of cementitious waterproofing and manufacturer specifications. Below are the typical ratios for each cementitious waterproofing technique.

Ratio for the cementitious slurry waterproofing: 1 part liquid (water/polymer) to 2-3 parts powder
Ratio for the trowel-grade cementitious waterproofing: 1 part liquid to 3-4 parts powder
Ratio for the cementitious dry shake waterproofing: No water required during application
Ratio for the cementitious integral waterproofing: Water-to-cement ratio of 0.40-0.50 (depending on mix design and admixture dosage)

What is the Difference Between Cementitious and Liquid Waterproofing?

Cementitious waterproofing is a rigid, cement-based solution that is easy to apply and cost-effective but can crack under movement and degrade under UV exposure. Liquid waterproofing is a flexible, resin-based waterproofing membrane with a more expensive, higher curing time, offers long-term protection, and adapts to structural movement.