Concrete Densifier FAQs

Find the answers to your questions below or ask our experts using our contact form – we’re here to help with your concrete projects.

What is a Densifier?

Adseal Densifiers are based on nano-silica and nano-lithium chemistry that penetrate concrete to increase surface density and hardness on both existing and freshly placed concrete.

The nano-particles penetrate deeply into concrete surfaces and makes the concrete more water, stain and abrasion resistant increasing compressive strength of concrete by up to 25% and abrasion resistance by about 2.5 times.
Adseal densifiers act as a very effective dust proofer, aid easier maintenance and increase longevity of the substrate and will ‘rescue’ many deteriorating surfaces [soft, friable, etc.] to avoid the cost of expensive overlays or replacement.
Adseal Densifier reduces the potential for freeze/thaw damage, shrinkage cracking, carbonation, efflorescence and rebar corrosion caused by salts and moisture penetration. Surface applications on newly placed concrete reduce the potential for these problems before they happen.
Adseal Densifier produces an extremely hard, dense surface that improves wear resistance to foot and fork lift traffic alike. It is water-based, and environmentally friendly.

How Densifiers improves the Physical properties of Concrete

The formulation penetrates and scavenges excess calcium hydroxide, a byproduct of the original hydroxide process, and reacts with it and water to form a hydro-calcium-silicate gel (HCS). Treatment with Adseal Densifer reduces the void and capillary spaces normally caused by bleed water. This aids in the formation of significantly denser cement paste that improves vapour and moisture barrier actions.
The ultimate result of treating concrete and mortar with Adseal Densifer is a lower porosity which means water-born salts and chemicals cannot easily penetrate the concrete. Treated concrete and mortar surfaces improve maintenance capabilities and can improve the bond between coatings and the substrate. Treated surfaces prevent peeling, cracking and loss of bond caused by capillary moisture or internal chemical reactions.

In What Circumstances would I use a Densifier?

Existing concrete structures, bridges, aprons, runways, warehouse/factory floors, access roads, etc., are liable to damage through abrasion, impact, freeze/ thaw cycle, etc.

Application of an Adseal densifier will protect the concrete surface and can even help bind together areas that are becoming soft &/or friable as they bind and strengthen the surface of the concrete and increase abrasion and impact resistance, thereby extending the product life and potentially saving the cost of expensive overlays or replacement.


An essential part of the grinding and polishing process to increase the density of the concrete to withstand the grinding process and to provide a dense surface for a high gloss finish [see our ‘How to Grind and Polish’ sheet].

Adseal LITHIUM densifier can also be used on freshly placed concrete both to aid the cure process and provide a superior power floated or polished finish with additional compressive strength and abrasion resistance for greater longevity and improved ‘whole life’ costs.

How long will it last?

As long as the concrete lasts – densifying alters and improves the chemical structure and does not form a coating like a sealer – this means it will never flake or crack and will outlast and out perform any traditional sealer – so no need to reseal [within at least 20 years]