RadonSeal vs Drylok: Which Waterproofing Product is Right for Your Project?

When it comes to choosing the right waterproofing product for your project, it can be a daunting task. With so many options available on the market, how do you know which one is the best for your needs? In this article, we will compare two popular waterproofing products – RadonSeal and Drylok – to help you make an informed decision.

RadonSeal: A Comprehensive Waterproofing Solution

RadonSeal is a trusted name in the waterproofing industry, known for its comprehensive and long-lasting solutions. Unlike traditional waterproofing products that simply form a barrier on the surface, RadonSeal penetrates deep into the concrete to form a permanent bond. This ensures that the concrete is waterproofed from within, preventing water and moisture from seeping through.

One of the key benefits of RadonSeal is its ability to also seal out radon gas, a naturally occurring radioactive gas that can seep through concrete and pose a health risk. By using RadonSeal, you can not only waterproof your basement but also protect your family from radon gas exposure.

Drylok: A Popular Choice for Basement Waterproofing

Drylok is another popular waterproofing product, known for its ease of application and budget-friendly pricing. It is a water-based coating that forms a protective barrier on the surface of the concrete, helping to prevent water and moisture from entering the basement or any other concrete structure.

While Drylok is a good choice for basic waterproofing needs, it may not offer the same level of comprehensive protection as RadonSeal. Its surface application may not be as effective in the long run, especially in areas with high water pressure or extreme moisture levels.

Comparing Performance and Durability

When it comes to performance and durability, RadonSeal outshines Drylok. RadonSeal penetrates deep into the concrete and forms a permanent bond, ensuring long-lasting waterproofing protection. It is also resistant to water pressure and can withstand extreme moisture levels, making it an ideal choice for basements, crawl spaces, and other concrete structures.

On the other hand, Drylok’s surface application may not offer the same level of durability and long-term protection. While it may be sufficient for basic waterproofing needs, it may not hold up as well in areas with high water pressure or frequent exposure to moisture.

Application and Ease of Use

When it comes to application and ease of use, Drylok has the upper hand. It is a water-based coating that can be easily applied to the surface of the concrete using a brush or roller. This makes it a convenient choice for DIY enthusiasts or homeowners looking for a simple waterproofing solution.

On the other hand, RadonSeal may require a bit more preparation and application effort. It is a penetrating sealer that needs to be applied using a sprayer or roller, and it may require multiple coats for optimal protection. However, the extra effort is worth it for the comprehensive and long-lasting waterproofing it provides.


When it comes to choosing between RadonSeal and Drylok, it ultimately depends on your specific waterproofing needs. If you are looking for a comprehensive and long-lasting waterproofing solution that can also protect against radon gas, RadonSeal is the ideal choice. However, if you need a budget-friendly and easy-to-apply waterproofing product for basic needs, Drylok may be more suitable.


Q: Can RadonSeal be used on existing waterproof coatings?

A: Yes, RadonSeal can be used to repair or enhance existing waterproof coatings. However, it is important to properly prepare the surface and ensure that the existing coating is compatible with RadonSeal.

Q: Is Drylok suitable for exterior waterproofing?

A: Drylok is primarily designed for interior waterproofing. While it may provide some level of protection for exterior applications, it may not hold up as well against the elements as dedicated exterior waterproofing products.

Q: Which product is more resistant to water pressure?

A: RadonSeal is more resistant to water pressure compared to Drylok. Its penetrating formula allows it to withstand high levels of water pressure and moisture, making it an ideal choice for basements and other below-grade structures.

radonseal vs drylok
RadonSeal and Drylok are two popular waterproofing products on the market, each with its own set of unique features and benefits. When considering which product to use for your project, it’s important to understand the differences between the two and how they can best meet your specific needs.

RadonSeal is a deep-penetrating, water-based concrete sealer that works chemically reacting with the minerals in the concrete to form a waterproof barrier. It is specifically designed to protect against water and vapor infiltration, making it an ideal choice for basements, walls, and floors. Drylok, on the other hand, is a cement-based waterproofing paint that is formulated to block water from entering through the interior walls of a foundation.

One key difference between the two products is their application process. RadonSeal is often applied using a spray or roller, while Drylok is typically brushed or rolled onto the surface. This difference in application method can affect the coverage and durability of the waterproofing.

In terms of effectiveness, RadonSeal is known for its ability to penetrate deep into the concrete and create a long-lasting barrier against water and vapor. It also has the added benefit of being able to withstand hydrostatic pressure, making it ideal for areas with high water table levels. Drylok, on the other hand, is best used for damp-proofing rather than full waterproofing, and it may not hold up as well in high-moisture environments.

When it comes to cost, RadonSeal is generally more expensive than Drylok, but it offers a more long-lasting and effective solution for waterproofing. While Drylok may be a more budget-friendly option, it may not provide the same level of protection against water and vapor infiltration as RadonSeal.

Ultimately, the decision on which product to use for your waterproofing project will depend on the specific needs of your project and your budget. If you are looking for a long-lasting, deep-penetrating waterproofing solution for a high-moisture environment, RadonSeal may be the best choice for you. However, if you are looking for a more budget-friendly option for damp-proofing interior walls, Drylok may be the better option. Regardless of your choice, it’s important to carefully follow the manufacturer’s instructions for application to ensure the best results. radonseal vs drylok

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