How Fortress Deep Seal Works

Fortress Deep Seal will permanently waterproof poured concrete slabs and walls. How? Fortress Deep Seal contains a proprietary catalyst which "pursues moisture" in concrete, and upon contact reacts with the "free" alkali (lime) and calcium hydroxides (already present in concrete or masonry) to form a silica gel inside the concrete. This gel moves via capillary action deep into the slab. The gel dries hard like glass inside the concrete turning the entire depth penetrated into a solid mass

This internal, permanent seal and water barrier also hardens and dust-proofs the surface while increasing the compressive strength.

The graphic below shows that there is no surface build-up of product which can peel or wear off. This is one of the reasons why Fortress Deep Seal is superior to the surface coating sealers typically available in big box stores.

Fortress Deep Seal does not fill visible cracks larger than about .75mm, but it waterproofs and strengthens all concrete including slabs and walls.