Cutting-Edge Penetrating Sealers for
Concrete, Brick, and Masonry

The best selection of the state-of-the-art penetrating sealers for concrete, bricks, and masonry:

• A wide choice of top-quality sealers using silicate, polysiloxane, silane, or polyester technology
• Commercial, industrial, or residential applications
• Indoor or outdoor, horizontal and vertical surfaces
• New or old
• Underground or above-grade.

These are not paints or surface sealants but unique, penetrating sealers that seal the substrate internally. The heaviest and strongest sealers in their class. Their common features:

1. No surface film – the seal cannot peel or wear off
2. Deep penetration into substrate (1/2 to 4 inches)
3. Preserve substrate against deterioration due to moisture and chemicals
4. UV-resistant – hidden deep below the surface
5. Durable seal for many years or the life of the substrate
6. Breathable – the smallest pores remain open 
7. Easy and safe application with a low-pressure sprayer 
8. Environment-friendly, no solvents, waterborne, zero or very low VOCs
9. User-friendly, non-toxic, nonflammable, non-hazardous.  

Superior to anything available in stores, which sell film-forming sealers that will break down or peel and most have to be re-applied every year. A brief Comparison of Concrete sealants …

How to select the best sealer for your project  

RadonSeal is the best sealer for bare (unpainted) poured concrete or concrete blocks with normal cement content. Not for colored concrete or fibercrete. It penetrates the deepest, strengthens the concrete, and forms the tightest seal against water, vapor, and even gases. For application tips, visit RadonSeal Application Instructions & Tips

The other sealers do not penetrate as deep but they seal regardless of the cement content, internal coloring, or additives. They also waterproof non-cementitious materials like bricks, stones, and lightweight masonry.

DryWay Water-Repellent is not suitable for negative side water pressure like in basements and retaining walls.

If the surface is painted, Ion-Bond Armor can waterproof even through a single layer of latex paint.

	RadonSeal	Ion-Bond Armor	LastiSeal (plain)	LastiSeal Stain	DryWay
POURED CONCRETE
Bare standard concrete	YY	Y	Y	Y	Y
Colored concrete	-	YY	Y	Y	YY
Fibercrete	Y	YY	Y	-	YY
Thin concrete (<2”)	-	YY	Y	Y	YY
Structural concrete (>5,000 psi)	-	YY	Y	-	-
Stamped concrete	-	Y	Y	-	YY
Acid stained concrete	-	YY	Y	Y	YY
Painted concrete (1 layer latex)	-	YY	-	-	-
CONCRETE BLOCKS
Concrete blocks, cinder blocks	YY	Y	Y	Y	Y
Mortar, parging on concrete	YY	Y	Y	Y	Y
Light-weight CMUs	-	Y	Y	Y	YY
Split face blocks	-	Y	Y	Y	YY
BRICKS, STONE, TILE
Clay bricks	-	Y	YY	YY	Y
Pavers	-	Y	YY	YY	Y
Mexican tile	-	y	YY	YY	Y
Man-made stone	-	Y	Y	Y	YY
Limestone	YY	Y	Y		Y
Masonry, facades, statues	-	Y	Y		YY
OTHER
Stucco on concrete	YY	Y	Y	Y	Y
Stucco on bricks	-	Y	YY	Y	Y
Concrete overlays, patching compounds, levelers	-	Y	-	-	YY

YY … the best choice Y   … good choice -    … not suitable

Newly poured concrete:
Let new concrete cure and develop capillaries for at least 28 days.
LastiSeal Concrete Stain & Sealer also requires a pH below 9 (paints need a pH below 10 or 9). Young concrete (1-2 years) may need a treatment with an acidic solution like our organic EasyEtch pH Reducer.

How to combine sealers for special applications 

How to deep-seal concrete and create a beading surface:
Seal the concrete with RadonSeal and after 10 days or later with DryWay Water-Repellent. Seals against negative and positive water pressure. Beads water. Spills can be wiped off. Unpaintable.

How to seal concrete slabs before installing moisture-sensitive flooring:
How to seal concrete slabs against gases or vapor intrusion (like trichlorethylene):
Deep-seal the concrete first with RadonSeal and after 10 days or later with Ion-Bond Armor. This forms the tightest possible internal seal against water vapor transmission and gases, including radon. The surface remains suitable for paints or adhesives.

How to waterproof and stain concrete in one step:
LastiSeal Concrete Stain & Sealer.

RadonSeal Deep-Penetrating Concrete Sealer (silicate-based)

Internal reactive sealer that penetrates up to 4 inches into concrete, chemically reacts with alkalis and hardens as a mineral. It's like injecting cement into the pores. Provides the tightest seal in concrete against water, vapor and gases. More about RadonSeal Concrete Sealers …

• Bonds, strengthens, and preserves concrete 
• Seals poured concrete, concrete blocks, cinder blocks, mortar, stucco, shotcrete, stucco, and grout (but not for fibercrete or colored concrete)
• Waterproofs against both positive and negative side hydrostatic pressure (basements, retaining walls)
• Seals also against water vapor and even radon gas but still "breathable"
• Neutralizes lime and stops efflorescence
• Hardens the surface and stops dusting
• The surface "wets" and remains paintable, suitable for adhesives, thinset, and overlays
• Resists acids and harsh chemicals, spills wash off easily
• Permanent, no re-applications ever needed
• Backed up by a Limited Lifetime Money-Back Guarantee. 

Ion-Bond Armor Subsurface Elastomeric Sealer (polysiloxane-based)

A unique subsurface elastomeric sealer that penetrates up to 1-1/2” into concrete. It's like injecting silicone caulk into the pores. Waterproofs against both positive and negative side water pressure. Often applied after RadonSeal for the tightest combined seal against vapor and gases. Seals even through a single layer of latex paint. About Ion-Bond Armor Concrete Sealer …

• For waterproofing basements and concrete retaining walls
• For exterior concrete, blocks, bricks, and masonry
• For concrete slabs, tight surfaces, fibercrete, colored concrete
• Sheds water, spills wash off easily
• Reduces water vapor and efflorescence
• Suitable for painting or adhesives, as well as thinset and overlays
• Permanent waterproofing seal.

DryWay Subsurface Water-Repellent Sealer (siloxane/silane-based)

Penetrates up to 1/2” into concrete and forms an elastomeric water-repellant barrier well below the surface, hidden from UV-rays. Not dependent on cement content. It's like injecting silicone caulk into the pores. About DryWay Water-Repellent Sealer …

• Seals driveways, garage floors, pool decks, blocks, clay bricks, pavers, stucco, and masonry
• Repels, beads, and sheds rainwater
• Protect against freeze-thaw, road salts, de-icers, and contaminants
• Ice and snow do not stick - saves on labor and snow-melting chemicals
• Spills wipe off easily, not paintable
• Reduces efflorescence
• Durable - lasts for many years.

LastiSeal Brick & Masonry Sealer (polyester-based)

Penetrates 2 to 4 inches into porous materials, fills up the pores and hardens. Seals a wide range of porous materials regardless of their cement content or additives. It's like injecting epoxy into the pores. Leaves the surface paintable, except for latex and silicone. About LastiSeal Concrete & Brick Sealers …

• Seal concrete, blocks, colored concrete, fibercrete, clay bricks, pavers, stucco, and porous stones
• Waterproofs permanently against rain and surface water
• Repels water – water beads on smoother surfaces
• Reduces water vapor transmission   
• Reduces efflorescence and dusting
• Resists chemicals, wipe or wash off spills
• Excellent primer for paints or coatings like epoxy, urethane, acrylics (but not latex)
• Limited 10-year waterproofing warranty.

LastiSeal Concrete Stain & Sealer (polyester-based)

Combines the plain LastiSeal penetrating sealer with UV-resistant pigment stains. Deep-seals and colors the substrate in one step. Beats concrete painting or acid-staining. About LastiSeal Concrete Stain …

• Use indoors or outdoors on concrete floors, driveways, pool decks, sidewalks, garage floors, parking areas, countertops.
• Seals and waterproofs permanently, repels water
• An attractive mottled look similar to acid-staining
• A wide choice of 37 attractive colors
• Matte or low-gloss finish depending on the surface
• Waterproofs permanently against rain and surface water
• Limited 10-year waterproofing warranty.