Eco-Friendly Construction Sealants for Commercial Projects: A Guide for Architects

The main purpose of construction sealants is to fill joints and gaps in buildings to keep out water, air, insects, and other environmental elements. While it’s important to understand durability, energy efficiency and performance, it’s also worth asking if the sealant is environmentally friendly. 

What Are Construction Sealants?

Construction sealants are specially formulated materials that fill and seal gaps, joints and seams in building structures. 

A sealant creates a flexible, waterproof and airtight barrier that keeps out water, air, dust and insects. It also helps improve energy efficiency, protects against weather damage and accommodates building movement without cracking or losing adhesion. 

The most common types of construction sealants are silicone, polyurethane and acrylic.

Eco-Friendly Construction Sealants

What makes eco-friendly sealants (also known as green sealants) different from traditional ones? They emit fewer volatile organic compounds (VOCs). This greatly improves indoor air quality and, of course, supports sustainability goals.

Types of Eco-Friendly Construction Sealants 

Architects have a variety of green sealants to choose from, each one offering unique benefits.

• Silicone-based (low-VOC sealants): Durable and flexible with reduced emissions.

• Water-based acrylic sealants: Easier to clean and less toxic, good for indoor use.

• Polyurethane sealants (low-VOC variants): Strong adhesion with improved environmental safety.

• Bio-based sealants: Made from renewable resources like plant oils.

Why Eco-Friendly Sealants Matter in Sustainable Construction

Eco-friendly sealants are becoming a popular choice in construction due to greater environmental awareness and a desire to contribute to a greener future.

Environmental Impact of Conventional Sealants

Many traditional sealants contain high levels of VOCs that increase air pollution and can pose health risks to both occupants and construction workers. Low-VOC and non-toxic sealants help decrease these harmful emissions.

Supporting LEED and Green Building Certifications

When choosing eco-friendly sealants, architects can earn valuable credits toward LEED certification and other green building programs. This shows a real commitment to the planet and helps to make buildings easier to sell or lease over time.

Key Performance Criteria for Commercial Sealants

When selecting a commercial sealant, it’s important to consider how well it handles factors like weather, movement and long-term wear and tear. Especially when reflecting on your building’s specific climate or environmental needs.

Durability and Longevity

Sealants must offer strong adhesion and resist aging to maintain their effectiveness, even when exposed to ever-changing environmental stresses.

Water and Air Barrier Properties

Effective sealants prevent water infiltration and air leaks, which help maintain energy efficiency and indoor comfort in a building.

Flexibility and Movement Tolerance

High elasticity and flexibility allow for the building’s movements without cracking or losing adhesion. This is especially important for expansion joints or for buildings that experience seismic activity.

Compatibility with Sustainable Substrates

Sealants must bond well with adjoining construction materials and substrates such as concrete, wood, metal, glass and aluminum.  

Recommended Eco-Friendly Construction Sealant Products

Several innovative green products can offer architects high-performance sealing solutions. Let’s take a look.

WATstop for Waterproofing and Crack Sealing

WATstop provides reliable waterproofing and crack sealing, adhering effectively to various surfaces to protect foundations and substrates.

Diathonite Systems for Breathable, Thermally Resistant Sealing

Diathonite systems create breathable seals that enhance heat resistance, contributing to energy-efficient building envelopes.

Decork as a Topcoat for Flexibility and Weather Resistance

Decork acts as a flexible, weather-resistant topcoat that shields joints and facades from environmental damage.

Where and How to Use Eco-Friendly Sealants in Commercial Projects

The effectiveness of an eco-friendly sealant is only as good as its user. The proper application of a commercial sealant is what will maximize its performance.

Foundation and Substrate Waterproofing

Sealants protect foundations and substrates from moisture, helping to preserve structural integrity and prevent any damage.

Window and Door Frames

Sealing around windows and doors helps prevent air and water leaks. This improves occupant comfort and reduces energy costs.

Expansion Joints and Facade Gaps

Sealants should always be flexible so they can move with expansion joints and gaps, helping to prevent cracks or other structural problems.

Roof Edges and Utility Penetrations

Sealants help maintain waterproof seals on the roof edges and around utility openings to protect buildings from water leaks and weather exposure.

Common Pitfalls in Sealant Selection

Avoid these common mistakes to ensure successful sealant performance and long-term building durability.

Ignoring Compatibility with Adjacent Materials

Sealants that are incompatible with connecting materials can easily lead to costly repairs along with adhesion failure. If you’re unsure, always read the product specifications.

Using High-VOC Products in Tight Indoor Spaces

High-VOC sealants can degrade indoor air quality and pose health risks, especially in confined areas.

Choosing Sealants Not Built for Movement or UV Exposure

Sealants that lack flexibility or UV resistance may crack or deteriorate quickly, compromising the building structure.

FAQs About Eco-Friendly Sealants

Have questions about eco-friendly construction sealants? Here are the answers to three of the most common questions we get about green sealants. 

How long do sustainable sealants last?

Typically, green sealants offer just as much durability as conventional options, lasting 10 years or more depending on environmental conditions.

Are eco-friendly sealants more expensive?

While some eco-friendly sealants may have higher upfront costs, their longevity, health benefits and contribution to green certifications provide much greater value for the long run.

Can they be used in cold or wet climates?

Many eco-friendly sealants are formulated to perform very well in diverse climates, including cold and wet conditions. But it’s always best to check the product specifications to ensure suitability for your project.

Top Takeaways on Eco-Friendly Construction Sealants for Commercial Projects

Architects who care about sustainable design should go for eco-friendly construction sealants to both keep buildings strong and the planet healthy. It’s a small, simple way to contribute to greener, healthier spaces without compromising on building integrity.

Explore Eco-Tech recommended sealant products to enhance your commercial projects with eco-friendly, high-performance sealing solutions.