Epoxy resin - robust material for many applications

Epoxy resin is a true all-rounder for home improvement and professionals. The epoxy resin can be used to coat both metal and wood as well as the concrete floor. In addition, epoxy is used in boat building and aquaristics. Here's an overview of the different areas and the tremendous benefits of epoxy resin.

Two components for the epoxy resin

Epoxy resin is basically a liquid plastic. Unlike other plastics, however, epoxy resin does not melt or deform again after it has hardened. On the contrary, epoxy resin is extremely impact-resistant and in combination with fiberglass material even complete boats are built from it.

Depending on the composition, epoxy resin is even particularly heat-resistant, unlike other plastics.

Applications of 2-component epoxy

  • boat building
  • surfboard finishing
  • Aquarium and terrarium
  • floor Coatings
  • Sealing of different materials
  • Adhesive made of epoxy resin
  • Interior renovation of water pipes

Boat building and repair

Since epoxy resin is absolutely waterproof and can not be harmed even by salt water, it is especially popular in boat building. Here it serves among other things to restore old wooden ships and repair.

In conjunction with fiberglass fabric, not only can larger holes be mended in boat hulls, but also complete hulls of vessels made of epoxy resin and fiberglass fabric are made. In many cases straight catamarans are being made with this material.

Aquarium and terrarium

Here, the epoxy resin can be used both for the construction of plastic back walls and three-dimensional components as well as for the construction of the aquarium itself. For example, so that hoses do not hang freely around the pumps, they can simply be glued to the back wall or a decorative object.

Objects and back walls can be built from polystyrene or polystyrene as desired. If, for example, they are coated with cement-based tile adhesive, they require a seal with epoxy resin after drying out. If the object should get a certain color, but this would have to be applied before the seal.

Floor coating and concrete sealing

Both in the industrial sector and in food processing as well as in shops and shops, epoxy resin is a robust and absolutely durable floor covering. Meanwhile, this coating is increasingly used in private settings for garages and basement floors.

In its clear form, the epoxy resin is also used today for exposed concrete on the floor and on the wall. However, since epoxy is yellowed and not lightfast, either a special epoxy resin must be used or a clearcoat must be overcoated.

mixing ratio

The mixing ratio of hardener and epoxy resin must be maintained very accurately. If too little hardener is stirred into the epoxy resin, some of the resin will remain without hardener and will not react as it should. The situation is similar if the two components are not thoroughly mixed with each other.

If you give too little hardener in the mass, the surface of the workpiece remains sticky later and does not harden completely. Too much hardener can make the workpiece brittle. The actually desired breaking and impact resistance is then not achieved.

Variations in the mixing ratio

However, there are also epoxy systems that are intended from the outset for a variation of the mixture. In these cases, both the hardness and the elasticity and the acid resistance can be controlled by the mixing ratio. After mixing the two components, a large heat of reaction can occur. In the worst case, it can come to a fire at a too thick layer of the epoxy resin and a non-optimal mixing ratio.

processing time

The processing time of 2-component materials is also called pot life. For epoxy resin, it is usually quite short. However, the smaller the amount of epoxy mixed, the longer the time before the mass dries. As a do-it-yourselfer, you can contribute a little bit to a longer processing time by processing only small quantities one after the other.

The processing time is also controlled by the temperature of the environment. At the same time a higher strength and improved heat resistance are achieved when the epoxy resin is subjected to an additional heat treatment after curing.

Advantages of epoxy resin

  • waterproof even in salt water
  • shockproof
  • durable
  • almost indestructible
  • non-stick surface
  • heat-resistant
  • resistant to many acids
  • resistant to alkalis


  • hard to remove again
  • clear epoxy is not lightfast and can yellow
  • Mixing ratio difficult
  • short processing time
  • long curing time
  • not recyclable

Tips & Tricks

One area of ​​application that is now being viewed more critically is pipe rehabilitation. In several cases, the toxic bisphenol A has been detected in drinking water from such pipes. You should therefore pay very close attention to whether it is not possible to replace the affected pipe in the conventional way before you take a risk for yourself and the family.

In rental apartments, where the pipes were renovated with epoxy resin from the inside, the courts have already awarded the tenants a rent reduction of 20 percent. Even claims for damages and compensation for pain and suffering can be passed on to the respective landlords.

Video Board: Filling Voids, Cracks, and Defects in Wood with Epoxy - Ask Matt #19