Sealants vs. Coatings: What’s the Difference?

Sealants and coatings are used to protect commercial buildings from water infiltration. Although many people use these terms interchangeably, there are key differences when it comes to sealants vs. coatings. 

What are Sealants?

Sealants are often polyurethane, silicone, acrylic, or a hybrid of these. Once applied, sealants remain flexible and move with the expansion and contraction of the building. They are often used to seal expansion joints, roofs, cracks in concrete, and around windows and door frames. Sealants contribute to the energy efficiency of the building because they seal gaps and reduce air loss. 

What are Coatings?

Coatings are fluid-applied and are often used on large areas, such as parking decks and exterior walls. Coatings create a large, seamless waterproofed membrane that acts as a protective layer. They are made from acrylic, silicone, or polyurethane. They are applied with rollers or brushes or sprayed over the surface. 

What are the Similarities Between Sealants vs. Coatings?

Surface Preparation: Without a clean, dry surface, a sealant or a coating will not adhere properly. 

Purpose: Both sealants and coatings are used to provide waterproof protection and work together to waterproof the building envelope.

Variety of Options: There are many options of both sealants and coatings that are formulated for different applications.

What are the Differences Between Sealants vs. Coatings?

Function: Coatings are used to cover a large surface area, such as a concrete deck, while sealant coverage is more localized, such as caulking around a window frame. 

Replacement Method: When it is time to replace a sealant, old sealant needs to be removed. Oftentimes you can apply an additional layer of coating on the existing coating. 

Lifespan: The lifespan of a sealant or coating depends on many factors, but typically sealants last 5 to 10 years, while coatings will need recoating every 10 to 15 years. 

While there are some differences and similarities between sealants vs. coatings, both play a vital role in protecting commercial buildings from water intrusion and water damage. For the best results, it’s important to hire a professional waterproofing company that understands what product and installation technique will work best for your application. 

Contact us today through our website here or call 713-699-4777 to talk to one of our waterproofing experts about your building’s sealant and coating needs.

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