Resin Building Products Ltd

Epoxy Flooring Coating Failures and How Installers Can Avoid Them

04-06-2026

Why Epoxy flooring systems are Epoxy Floors Fail (and Why It’s Rarely the Product Alone)

popular in industrial and Most issues stem from surface preparation, environmental conditions, application methods or system choice. Identifying these risk areas helps installers reduce errors, avoid repairs and deliver long-term performance on every project.

Poor Surface Preparation

The issue: Delamination, peeling or premature wear caused by insufficient bond between the coating and substrate.

Common causes

Residual oil, grease or laitance

Inadequate mechanical preparation

Weak or friable concrete

How installers can avoid it

Mechanically prepare substrates using shot blasting or diamond grinding

Remove all contaminants prior to coating

Assess concrete strength before installation

Installer insight: No epoxy flooring system can outperform the quality of its substrate preparation.

Moisture-Related Failures

The issue: Blistering, bubbling or loss of adhesion due to moisture vapour pressure beneath the coating.

Common causes

High moisture content in new slabs

Absence of an effective damp proof membrane

Rising moisture in older concrete floors

How installers can avoid it

Conduct moisture testing before installation

Use moisture-tolerant primers where necessary

Select systems suitable for the slab’s condition

Skipping moisture assessment is one of the most common and expensive mistakes in epoxy flooring installations.

Incorrect Mixing or Inadequate Mixing

The issue: Soft curing, tacky surfaces or uneven finish.

Common causes

Incorrect resin-to-hardener ratios

Insufficient mixing time

Unmixed material staying at container edges or at the bottom of the tin

How installers can avoid it

Follow manufacturer mixing ratios precisely

Use mechanical mixing for the specified duration

Double-pot / pour mixed material into a clean bucket to ensure consistency and do not drain / upturn mixing buckets onto the floor

Correct mixing is critical to achieving the designed performance of an epoxy resin floor coating.

Application in Unsuitable Environmental Conditions

The issue: Delayed curing, surface defects or amine bloom.

Common causes

Cold substrates

High humidity levels

Application outside recommended temperature ranges

How installers can avoid it

Monitor ambient and substrate temperatures

Check dew point conditions before installation

Adjust schedules to suit site environments

Environmental control is often underestimated, yet it plays a major role in coating success.

Incorrect System Selection for the Environment

The issue: Premature cracking, excessive wear or coating breakdown.

Common causes

Rigid systems used on moving substrates

Insufficient build for traffic levels

Exposure to chemicals beyond system capability

How installers can avoid it

Match systems to traffic, movement and chemical exposure

Consider flexible or specialist systems where required

Seek technical guidance during specification

An epoxy resin floor coating must be selected based on real-world site conditions, not just appearance.

Insufficient Curing Before Use

The issue: Indentation, surface marking or early wear.

Common causes

Foot or vehicle traffic introduced too early

Heavy loads applied before full cure

How installers can avoid it

Follow minimum cure times strictly

Communicate access restrictions clearly to clients

Allow additional curing time in colder conditions

Prevention Starts Before Installation

Most epoxy flooring failures are preventable. Proper preparation, environmental awareness, accurate mixing, and correct system selection significantly reduce the risk of failure and callbacks.

For installers, taking the time to assess conditions and specify the right solution upfront protects reputation, margins and long-term client satisfaction, delivering floors that perform as intended for years to come.