A Practical Guide to Applying Epoxy Grout |Mapei Singapore

 April 1, 2022. 6:35 AM

Apart from cementitious tile grouts that are commonly used for construction and renovation, another option is epoxy tile grouts. Epoxy tile grouts, by nature, have extremely low water absorption, is more resistant to stain and unlikely to promote mould growth. However, dirt can still accumulate on grout surface, though it can be cleaned off with scrubbing.

There are performance standards for epoxy tile grouts. They are classified RG according to BS EN 13888 and ISO 13007-3 standards.

reaction resin tile grouts standards

Marble glue vs Epoxy tile grout for Marble joints

Marble glue is an adhesive compound that is used to fill crevices or cavities of marble, granite and other stones. It may not possess the properties of a “reaction-resin” grout, class RG, in accordance with the standards. Marble glue is rigid by nature and may not have the physical properties required for the joint. Mapei’s Kerapoxy Easy Design belongs to class RG and meets the performance requirements in the standards. Kerapoxy Easy Design can be applied to joints in internal marble flooring and a nice seamless finish can be achieved after a polishing process.

Factors to consider when using epoxy grout

Setting time

Epoxy grout has shorter working time and sets faster than cementitious grout. Once the components are mixed together, the chemical reaction of the product starts to take place. Therefore, mixing the product in smaller quantities in its pre-measured ratios is recommended and to use up the epoxy mortar mix within 30 minutes of the mix.


Tile surface

Tiles with textured surface may be harder to clean as the resin can be trapped in the recessed parts during the application. The cleaning process will require a scrubbing pad and water to loosen the mortar and then wipe off with a special sponge. The process is to be repeated until the surface is clean.


External areas

When applying epoxy grouts on external areas, one must be mindful of the ambient temperature. On a sunny day, the epoxy grout will dry up much faster than usual. It makes cleaning difficult and may result in residue stains. It is generally not advisable to use epoxy grouts for external areas. However, when using epoxy grouts to fill tile joints in swimming pools, application must be done under shelter.  

How to apply epoxy grout for a perfect application

Epoxy tile grout works differently from cementitious grouts (know their difference in “Types of Grouts for Tile and Stone works). The application of epoxy grouts requires an experienced tradesman. It is easier to get it right the first time than to rectify issues after it has occurred.

Below are the recommended application methods for applying epoxy grouts:

  1. Mix the components in accordance to the recommended ratio and with an electric mixer.

  2. Apply grout mortar with a firm rubber trowel.

    perfect application grout mortar in Singapore     perfect application grout mortar in Singapore

  3. Remove excess grout mortar using the edge of the rubber trowel. It is important not to wait too long to remove the excess grout so that there is minimal grout residue left on the surface.
    excess grout mortar removal

  4. Wet the surface with water and use a scrubbing pad to loosen the grout residue. After a few rounds of cleaning, the water tends to get sticky with resin residue. Always change the water after a few rounds of cleaning, otherwise, reusing the water will leave a sticky residue on the surface.
    surface cleaning of loose grout residue in Singapore

  5. Final clean the surface thoroughly with clean water and sponge within the day of application and ensure that the surfaces are not sticky.
    Surface cleaning with clean water and sponge

  6. For epoxy grouts in marble flooring, do an on-site polishing to achieve a seamless joint finish.

    Epoxy grouts in marble flooring

Epoxy grout is a practical, easy to maintain and long-lasting tile grout solution. Remember these tips when doing your own tile grout or get the service of a professional builder for a satisfying outcome. Browse for more practical tips and guides for your renovation and building works at Mapei or contact us through +65-68623488 for your inquiries and concerns or fill up our enquiry form on our contact page.


About Mapei:

Founded in Milan since 1937, Mapei is today a world leading producer of adhesives and complementary products for the laying of all types of floor, wall and coating materials. Mapei’s specialty lies in products for ceramics and stone materials, among other product lines. Mapei’s adhesives for tiles and stones are certified according to international standards and are SGBC certified. Experience proven by numerous notable projects worldwide.

Products mentioned in the article

Two-component, versatile, decorative, acid-resistant epoxy grout, with a bacteriostatic agent and BioBlock® technology, easy to apply and…
Two-component, high-performance, anti-acid epoxy mortar and adhesive with no vertical slip for laying and grouting ceramic tiles and stone…

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