Penetrating vs Topical Sealers

All sealers can be broken down into two categories.  They can be a topical sealer, or they can be a penetrating sealer.  As one would surmise, a topical sealer covers the top surface and bonds with the material it is applied to.  A penetrating sealer works into the surface of the material it is applied to, and binds with the molecular structures of the material from the surface and up to 2 inches below it in some cases.  While there is some new sealers on the market that claim to work on and below the surface, they have mixed reviews as to their claims.  Choosing the type of sealer you are going to use depends on the desired outcome you are trying to achieve. 

Topical sealers (also referred to as film-forming) form a protective barrier against mold, mildew, algae and most mild chemicals that can cause staining.  Their job is to protect the surface of the material they are applied to.  Film forming sealers are typically thicker than penetrating sealers as they contain acrylic or epoxy polymers.  Film formers will be visible as they often enhance the color of the material they are applied to and appear glossy.  Topical sealers have a nice look when new.  Acrylics typically last a couple of years while some epoxies can last 7-10 years before re-application.  As one might expect, topical sealers can be slippery when wet.  Anti-skid additives can help reduce the slip factor.  Topical sealers can also peel and flake if the surface is not prepped properly or as the surface encounters wear. 

Penetrating sealers make use of chemicals whose molecular structure is much smaller than acrylics and epoxies.  Their smaller size allows them to penetrate the surface.  They are also more sophisticated in their design as they contain fusion forming particulates that seek out compatible molecules in the material they are applied to.  Like magnets sticking together, these compatible molecules fill in the microscopic capillaries of the material they are applied to, forming an impenetrable barrier.  Most penetrating sealers do not enhance color.  They also do not appear glossy and typically do not increase the slip factor.  Penetrating sealers are not known to peel or flake.  Because they fuse with the material below the surface, penetrating sealers last longer than film forming sealers.           

For more information on selecting the right sealer click the following link 

  http://www.bobvila.com/HowTo_Library/Concrete_Sealers-Concrete_Floors-A2530.html

Concrete Solutions for a Clean Environment LLC has the right sealer for your application.  They can answer all of your technical questions.