When it comes to waterproofing sealers, there are a few different categories:

1. Penetrating Sealers: Penetrating sealers, like the Armor S2000 concrete sealer, is designed to chemically react with the concrete to form Calcium Silicate Hydrate within the pores. Through densification, the Armor S2000 will reduce the penetration of water, moisture and Radon. The most powerful selling point with this sealer is that it is guaranteed for life. Another manufacturer of sodium silicate based sealers is VSeal.
2. Topical Sealers: Topical sealers provide a powerful coating on the surface designed to hold back water. Drylok is one of the most popular waterproofing coatings used by homeowners. Another popular option is a moisture mitigating epoxy coating.