Concrete Sealers Explained: When to Use Acrylic, PU, or Epoxy Options

Choosing the right concrete sealer is one of the quickest ways to improve durability, reduce staining, and keep floors and exterior slabs looking sharper for longer. 

But identifying what the best concrete sealer is for the task at hand can sometimes be difficult. It really depends on where the concrete is, what it’s exposed to, and what finish you want.

So, with this, let's dive into absolutely everything you need to know about concrete sealers.

 

Types of concrete sealer (and the two main types)

When people search for types of concrete sealer, they usually mean both:

1. Topical/film-forming sealers: Sit on top and form a protective layer (common with acrylic and many polyurethane (PU) systems).
   
   

2. Penetrating / impregnating sealers: Soak in and protect within the surface (common with “impregnating” formulas, and also certain primers/sealers used as a base coat).

But which one is for me? 

 

Quick decision guide (pick your system in 30 seconds)

Use Acrylic if you want:

• Lower odour / easier application

• UV resistance for outdoor slabs

• A tidy “freshened up” look (often eggshell/satin)

 

Use PU (polyurethane) if you want:

• Stronger stain/oil resistance and a tougher-wearing clear coat

• A wet-look/satin finish for driveways, garages, and workshops

• Higher durability vs many basic acrylic sealers
  
  

Use Epoxy (as a primer/sealer + epoxy topcoat) if you want:

• Maximum performance for high-wear internal floors (garages, units, workshops)

• A system designed for abrasion/impact and chemical resistance

• A proper base that boosts adhesion and longevity

 

When to use an acrylic concrete sealer

Acrylic is the go-to for concrete patios, paths, and general domestic/commercial concrete where you want protection without the complexity of a multi-pack system.

 

Best concrete patio sealer: acrylic (most of the time)

For patios, the priorities are usually UV stability, weather resistance, and easy cleaning. Acrylic sealers can tick these boxes, especially when they’re specified as UVA-resistant and built for exterior use.

Product-led options:

• Paintmaster Quick Drying Acrylic Concrete Sealer: Water-borne acrylic resin sealer with UVA/fade resistance, oil/water resistance, eggshell finish; touch dry ~2–3 hours (conditions dependent).

• Everest Trade Ultimate Concrete Sealer (solvent-free, impregnating acrylic): Positioned as a premium, flexible acrylic sealer that won’t flake/blister/peel and is described as having an average 10+ year lifespan.

 

Where acrylic isn’t ideal

• Constant tyre scrub/very heavy vehicle traffic (consider PU or epoxy systems)

• If you need a full “industrial floor coating” build (consider epoxy primer and epoxy topcoat)

 

When to use a PU (polyurethane) concrete sealer

PU sealers are a strong choice when you want a tougher clear coat. They work particularly well for driveways, garages, workshops, and commercial concrete that sees oils, stains, and traffic.

 

Best waterproof sealer for concrete (everyday water resistance)

If by waterproof you mean resisting rainwater, spills, and water ingress that leads to staining/damage, 

PU systems are often a smart upgrade because they’re designed for hard-wearing protection and stain resistance. If you mean tanking/waterproofing against hydrostatic pressure, that’s a different spec entirely. 

Product-led options:

• Everest Trade PU Resin-Based Concrete Sealer: marketed as a high-performance polyurethane sealer that resists oil/stain penetration and is described as durable with a satin/wet-look finish; also positioned as “most durable” within that range.
  
  

• Paintmaster Polyurethane Resin-Based Concrete Sealer: solvent-borne PU sealer with stain resistance and a semi-gloss/eggshell finish; includes stated coverage guidance and typical touch-dry times.
  
  

 

When to use epoxy options (and why they’re different)

Epoxy is the move when you’re building a floor system, not just sealing for appearance.

For garages and heavy-use internal floors, the practical approach is a two-stage epoxy system consisting of a primer/sealer followed by an epoxy floor coating.

• Everest Trade Deep Penetrating Epoxy Primer/Sealer (two-pack, solvent-free): positioned to strengthen loose/crumbling concrete, improve adhesion for epoxy paints, and handle heavy wear; includes cure-time guidance for foot and vehicle traffic.
  
  

• Then finish with an epoxy floor paint system designed for hard-working floors (garages, warehouses, workshops, showrooms).

If you want professional results, this system approach is usually the best path.

 

What is the best sealer for painted concrete?

It depends on the condition of the paint:

• Paint is sound (well-bonded, no flaking): You may be able to overcoat, but compatibility is key (your “sealer” might actually be the next coating layer).
  
  

• Paint is failing or unknown: Remove loose material and use a system designed for adhesion and durability (often a primer/sealer step before topcoating).

For problem substrates and high-wear interiors, an epoxy primer/sealer is commonly used to improve adhesion and set up the surface for a tougher coating system.

 

Prep matters (more than the product)

Even the best concrete sealer will fail if the slab is damp or too smooth.

A solid baseline:

• Clean + degrease (especially garages/workshops)

• Remove dusting/chalky residue (use a dustproofer/primer-sealer where needed)

• Mechanical prep where required (e.g., grinding/etching for dense surfaces and epoxy systems)

• Keep the surface fully dry before sealing (many product pages explicitly warn against moisture/rain risk during application)

 

Concrete sealer recommendations by job

Ready to choose? 

If you want the “right first time” pick (and the right prep method), contact us for free. We’re happy to help.