Concrete Sealer is a protective liquid or gel coating that is applied to concrete surfaces. It acts as a barrier to protect the concrete from damage caused by water, chemicals, salt, and other environmental elements.
Types
There are different types of concrete sealers suitable for various applications:
Acrylic Sealers
Acrylic sealers are water-based and among the most popular sealers used for driveways, patios, and flooring. They are affordable, easy to apply, and provide good protection from water and chemicals. However, they are not as durable as other sealers and may require reapplication every 1-2 years.
Epoxy Sealers
Epoxy sealers form a very strong bond with concrete surfaces. They are highly durable, resistant to chemicals, and can last 3-5 years. However, they are more expensive than acrylic sealers. Epoxy sealers are best for garages, basements, and commercial floors with heavy traffic.
Penetrating Sealers
Instead of creating a surface film like other sealers, penetrating sealers soak into the pores of the concrete. They are almost invisible but shield the concrete from within. Penetrating sealers boost stain resistance and are suitable for newly laid concrete that isn't fully cured. Reapplication may be needed every 1-2 years.
Benefits of Concrete Sealers
Here are some key benefits of applying a high-quality Concrete sealer:
Protects Against Water Damage
Water is one of the biggest enemies of untreated concrete. It can seep inside and expand during freezing, causing cracks and crumbling. Sealer creates a protective barrier to prevent water infiltration.
Improves Aesthetic Appearance
Concrete Sealers fills in surface pores and imperfections, resulting in a smoother, more uniform look. It enhances the natural coloring and finishes the appearance.
Stain Resistance
Spills and marks wipe away easily from sealed concrete. Common stains like oil, grease, food coloring are unable to soak in sealer-coated surfaces.
Reduces Dusting
Untreated concrete produces a fine powdery dust as it wears down over time. Sealer minimizes concrete dust by shielding the top layer.
Prolongs Concrete Life
Sealing regularly extends the longevity of concrete by protecting it from environmental damage. It prevents early deterioration that requires repairs or replacement.
Considerations before Sealing Concrete
There are certain factors to consider before applying a concrete sealer:
New Concrete Must Cure
Freshly laid concrete needs 4-6 weeks to fully cure. Sealing prematurely can prevent proper curing and weaken the concrete structure.
Surface Preparation is Key
Thoroughly clean, power wash and dry the concrete. Grind off any uneven or deteriorated areas. This ensures proper sealer adhesion.
Evaluate Concrete Condition
Concrete sealers with extensive cracking or crumbling requires repair work prior to sealing. Sealers cannot remedy pre-existing defects.
Test Sealer in Hidden Area
It is prudent to test a sealer in an inconspicuous spot first, to check for desired finished look and any issues like bubbling or discoloration.
Consider Maintenance Needs
Some sealers may require reapplication every 1-2 years as they eventually wear away. Ensure you can commit to routine maintenance.
How to Apply Sealer Properly
Here are the basic steps to properly apply a concrete sealer:
1. Clean the Concrete
Thoroughly scrub with a degreasing cleaner and pressure wash away any dirt or residue. Let it fully dry.
2. Inspect for Defects
Test for crumbling or cracking and fill any gaps or holes using a concrete patch compound.
3. Etch if Needed
New smooth concrete may require acid etching to open pores for better sealer penetration. Rinse afterwards.
4. Apply First Coat
Use a roller, brush or sprayer and spread sealer with even strokes according to product instructions.
5. Second Coat for Epoxy
Epoxy sealers typically need two thin coats applied within 24 hours of each other for complete protection.
6. Allow to Cure and Dry
Follow curing times between coats and before allowing foot traffic—usually 24 hours minimum for proper drying.
7. Maintain Regularly
Reapply another coat every 1-2 years depending on wear and sealer type to maintain the protective barrier.
Concrete sealing is a smart solution to prolong the lifespan and aesthetics of concrete surfaces. With proper sealer selection and application techniques, it delivers durable protection against damage from environmental exposure. Regular maintenance sealing is needed to continuously safeguard your investment.
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