Choosing the right coating material is essential for protecting industrial assets while reducing long-term maintenance costs.

As the demand for epoxy coatings and industrial protective coatings that are more durable, safer to use, and lower in VOC emissions continues to grow, more companies are turning to 100% solid epoxy resin as the foundation of solvent-free coating systems. 

Compared to solvent-based coatings, this formulation provides a longer-lasting finish, significantly lower emissions, and more consistent performance after curing.

Compared to solvent-based systems, solvent-free epoxy delivers longer-lasting protection, lower emissions, and more consistent performance after curing.

What Is Solvent-Free Epoxy Resin (100% Solids), and How Does It Differ from Solvent-Based Epoxy?

Solvent-free epoxy resin, also known as 100% solids epoxy, is an epoxy system in which all components react to form a solid protective coating during the curing process. In other words, nearly all of the applied material becomes part of the finished coating, with no solvent evaporation.

This differs from solvent-based epoxy, which contains organic solvents that evaporate during curing. As the solvent escapes, the coating film becomes thinner, often requiring multiple coats to achieve the desired thickness.

As a result, solvent-free epoxy resin is increasingly used in a wide range of applications, including epoxy flooring, industrial floor coatings, heavy-duty flooring, and industrial protective coatings that require excellent resistance to mechanical wear and chemical exposure.

Parameter

Solvent-Free (100% Solids)

Solvent-Based

VOC Content

Low to Zero VOC

High

Shrinkage

Minimal (0–1%)

High due to solvent evaporation

Film Thickness

High-build

Thin to medium-build

Application Odor

Very low

Strong

Fire Risk

Very low (non-flammable)

High due to flammable solvents

Why Are Industries Switching to Solvent-Free Coatings?

The shift toward solvent-free coatings is more than an industry trend. It reflects a growing need to improve workplace safety, coating performance, and long-term operational efficiency.

Improved Workplace Safety (EHS) and Lower VOC Emissions

One of the biggest advantages of solvent-free epoxy resin is its extremely low or often Zero-VOC content. Volatile Organic Compounds (VOCs) are chemicals that easily evaporate into the air and may affect indoor air quality.

In confined spaces, coatings with high solvent content can expose workers to potentially harmful chemical vapors. Solvent-free systems help create a safer working environment while supporting compliance with Environmental Health and Safety (EHS) standards.

With little to no solvent, these coatings also produce significantly less odor during application.

Superior Film Build and Long-Term Durability

Because no solvent evaporates during curing, solvent-free epoxy creates a thicker protective film in fewer coats.

The cured coating provides excellent adhesion to a variety of substrates, including concrete and steel, while offering outstanding resistance to:

  • Abrasion from heavy equipment traffic
  • Mechanical impact
  • Industrial oils
  • Mild acids and alkalis
  • Moisture and humidity

These characteristics make solvent-free epoxy a preferred choice for chemical-resistant coatings, corrosion protection coatings, and high-build epoxy coatings across a wide range of industrial facilities.

Greater Application Efficiency with Minimal Shrinkage

Another key benefit of solvent-free epoxy is its minimal shrinkage during curing.

Without solvent evaporation, the coating maintains its original film thickness after curing. This also reduces the risk of micro-cracking, pinholes, and other surface defects.

As a result, manufacturers can minimize rework, improve application efficiency, and lower long-term maintenance costs.

What Should You Consider Before Switching to Solvent-Free Epoxy?

Although solvent-free epoxy offers many advantages, proper formulation and application are essential to achieve the best results.

Viscosity and Application Methods

Compared to solvent-based systems, 100% solids epoxy generally has a higher viscosity.

Depending on the application, common methods include:

  • Roller application for general coatings
  • Trowel application for self-leveling flooring systems
  • Plural-component spray systems for large or vertical surfaces

Selecting the right application method helps ensure uniform film thickness and optimal coating performance.

Hardener and Substrate Compatibility

Epoxy resin must be paired with the appropriate curing agent (hardener) to achieve complete polymerization.

Surface preparation is equally important. Concrete substrates should meet the recommended moisture level, while steel surfaces should be free of rust and contaminants to ensure maximum adhesion.

Why Is Epoxy Resin 828 a Standard Choice for Solvent-Free Coating Formulations?

In industries such as flooring, marine coatings, industrial protective coatings, tank linings, and various construction applications, Epoxy Resin 828 is widely recognized as one of the industry's standard base resins for solvent-free coating formulations.

Its key characteristics include:

  • Low viscosity for easier formulation
  • High purity for consistent coating quality
  • Low chlorine content for improved performance
  • High clarity for greater formulation flexibility
  • Excellent formulation stability across a wide range of industrial applications

With these characteristics, Epoxy Resin 828 is widely used as a base resin in coating formulations that require excellent resistance to chemicals, moisture, and mechanical stress.

The final performance of the coating, however, depends on the overall formulation, including the choice of hardener, fillers, additives, and the application process.

Frequently Asked Questions (FAQ)

What is the difference between solvent-free and solvent-based epoxy in terms of coating performance?

Solvent-free epoxy maintains its original film thickness after curing because it experiences little to no shrinkage. In contrast, solvent-based epoxy loses film thickness as the solvent evaporates, often requiring additional coats.

Is solvent-free epoxy resin more expensive than solvent-based epoxy?

The initial material cost may be higher. However, the overall cost of ownership is often lower because fewer coats are required, the coating lasts longer, and maintenance and repair costs are reduced.

How is 100% solids epoxy applied to large surfaces?

For self-leveling flooring, it is commonly applied using rollers or trowels. Large or vertical surfaces are typically coated using a plural-component spray system to ensure consistent coverage.

Is Epoxy Resin 828 suitable for chemical-resistant coatings?

Yes. Epoxy Resin 828 is one of the most commonly used base resins in chemical-resistant coating formulations. The coating's final chemical resistance depends on the overall formulation, including the type of hardener, pigments, fillers, and additives used.

Your Trusted Partner for Coating & Construction Chemical Raw Materials

The quality of your raw materials plays a critical role in the performance of the final coating. That's why choosing an experienced epoxy resin distributor is just as important as selecting the right resin.

As a trusted distributor of specialty chemicals for the coating and construction industries, Bahtera Adi Jaya offers a comprehensive product portfolio, including Epoxy Resin 828, to support a wide range of industrial formulations.

Today, Bahtera Adi Jaya is trusted by more than 200 industrial customers, offers over 200 specialty chemical products, completes more than 2,000 deliveries annually, and has supported the development of over 100 industrial formulations across multiple industries.

If you're looking for a trusted epoxy resin distributor for epoxy flooring, industrial protective coatings, or other industrial coating applications, our team is here to help. Contact us for technical consultation or request a sample of Epoxy Resin 828 to support your coating formulation development. Find your solutions with Bahtera here.