Solvent Free Epoxy Floor Coating

A solvent-free epoxy floor coating is an epoxy system with no volatile carrier — the mixed product is close to 100% solids, so almost everything you apply stays on the floor as cured film. Nothing has to evaporate for the coating to set.

That single difference is what makes solvent-free systems the route for thick builds and heavy-duty floors. KAIDA PAINT® supplies six solvent-free epoxy products covering primer, mid-coat and top coat, including self-leveling and colored-sand finishes. This page covers what the technology is for, and what it asks of you on site.

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What “Solvent-Free” Means

Solvent-free (also called 100% solids, or high-solids) describes how much of the mixed product becomes film. Three consequences follow directly from it:

Wet film equals dry film. With no carrier to evaporate, the thickness you place is close to the thickness you get. Film build is predictable, and you need less material per millimetre than a solvent-borne system.
Almost no shrinkage. A thick solvent-free coat will not pull back and dish as it cures the way a solvent-borne thick coat can.
Low VOC. There is very little volatile content to release, so solvent-free systems are the route where VOC limits or indoor air quality are the governing constraint.

Solvent-free is not the same as water-based: water-based uses water as the carrier, solvent-free uses no carrier at all. The three routes — solvent-based, water-based and solvent-free — are compared on the epoxy floor coating overview page.

The Solvent-Free System We Supply

Strato	Prodotto	Role
Primer	E811 Primer epossidico senza solventi	Seals the prepared slab and bonds the build coats
Primer and mid-coat in one	E811-2 Primer epossidico per pavimenti senza solventi Rivestimento intermedio	Combines the sealing and build stages into one operation
Mid-coat	E822 Vernice intermedia senza solventi	Adds film thickness without a volatile carrier
Top coat (self-leveling)	E8300 Finitura epossidica autolivellante per pavimenti	Seamless, high-gloss surface
Top coat (solvent-free self-leveling)	E8302 Finitura epossidica autolivellante per pavimenti senza solventi	Seamless finish on a fully solvent-free build
Top coat (colored sand)	E8308 Finitura autolivellante epossidica color sabbia	Decorative aggregate surface with good grip

Why Thick Builds Need a Solvent-Free System

Thickness is how a resin floor carries load, resists abrasion and survives thermal shock. Building thickness with a solvent-borne system is possible but wasteful and less predictable, because the carrier that has to evaporate also has to escape through the film.

If you need	Solvent-free gives you	A solvent-borne system gives you
Predictable film build	Wet film close to dry film — material calculated per millimetre	Applied volume shrinks as the carrier leaves; build has to be calculated from solids content
A single thick coat	Can be placed thick without dishing	Thick coats risk solvent entrapment and shrinkage
Low VOC on site	Very little volatile content released during cure	Highest VOC of the three routes
Penetration into a dense slab	Higher applied viscosity — less able to soak into a tight surface	Low viscosity solvent-borne primers penetrate tight, dense concrete better

Where Solvent-Free Systems Are Specified

Scope: solvent-free epoxy suits indoor, ambient-temperature concrete floors where film build, low VOC or cleanliness is the driver.

Heavy-duty industrial floors — forklift traffic, point loads and abrasive wear, where the build thickness does the work.
Clean and controlled environments — pharmaceutical, food and electronics areas, where a seamless, high-build surface is easier to clean and where VOC release during application is restricted.
Facilities that stay in operation — solvent-free systems are the route for buildings where solvent odour and storage cannot be tolerated.
Colored-sand and decorative builds — E8308 produces a speckled aggregate surface with grip, built on a solvent-free system.

Where the constraint is instead a tight, dense slab that has to be penetrated, or a floor in direct sunlight, a different product is the right answer — a solvent-based primer for penetration, and a polyurethane top coat where UV exposure is the issue.

FAQs About Solvent-Free Epoxy Floor Coatings

Is solvent-free epoxy the same as 100% solids?

In practice the terms are used interchangeably for floor coatings — near-zero volatile content, so almost all of the mixed product becomes film. Always confirm the actual solids figure and VOC in g/L on the product TDS rather than relying on the label.

Can solvent-free epoxy be applied over a damp slab?

Substrate moisture content must be at or below 8% at application, and a waterproof layer is required. Solvent-free has no carrier to evaporate, but it still will not allow moisture vapour to pass — residual slab moisture will push the coating off from below.

Why does solvent-free epoxy cost more per kilogramme?

Because there is no solvent to dilute it, a kilogramme of solvent-free product delivers close to a kilogramme of cured film, while a solvent-borne product delivers only its solids fraction. Compare systems by cured film per unit area and per millimetre of build, not by pail price.

Does solvent-free epoxy need a primer?

On most concrete floors, yes — E811 Solvent-free Epoxy Primer, or E811-2 where the primer and mid-coat stages are combined. Penetration into a dense slab is one thing a solvent-free primer does less well than a solvent-borne one, so on a tight, power-troweled slab tell us before we specify.

Request the Solvent-Free Data Sheet

Solids content, VOC in g/L, film build and substrate requirements for each solvent-free epoxy product. Tell us the slab condition, the load and the cleanliness class, and we will recommend the build.