Hychem E500T — Epoxy Patching Mortar Binder

Prior to the application of HYCHEM E500T, the substrate must be thoroughly prepared.

• E500T would normally be used as a patching compound over a substrate that has already been primed with the E500P product. See the E500P technical data sheet for surface preparation instructions.
• To ensure that all holes have been filled it will be necessary to apply E500T over the entire primed surface before the application of the protective topcoat.
• If it is not practical or possible to do so within the maximum recoat window then it will be necessary to abrade the entire surface to provide a suitable key.

It is important to note that even when the application environment is warm, products which have been stored in cold or cooler conditions should be pre-conditioned, ideally to 20-25°C, to ease mixing and application and help avoid other potential issues such as amine bloom or blushing. Applying a cold product in a warm environment is not recommended.

HYCHEM E500T Epoxy Mortar is prepared by mixing the A and B components at a mix ratio of 2:1 by volume.

The wet mortar mix is applied to a hand trowel and then skimmed over the entire surface at an approximate coverage rate of 4 square metres per litre. After application the mortar filled holes are allowed to cure for a minimum of 8 hours. The designated coating is then applied within 24 hours of the E500T application.

Temperature and the surrounding atmospheric conditions will play a part in the curing process of all resin products. Under conditions of low temperatures and high humidity the final cured surface finish can be adversely affected, potentially resulting in poor gloss retention, discoloration over time, poor overcoat ability and inter-coat adhesion. Quite often these conditions will result in the formation of a white film over the surface, often evident after contact with water. If this occurs, the existing coating will need to be abraded to completely remove the affected surface to ensure the adhesion of subsequent applications. In some cases, partial or complete re-priming may be necessary. Attention also needs to be paid to the substrate temperature, which should be at least 3-5 °C above the dew point during the curing phase. Industry standards recommend the accurate recording of environmental conditions such as substrate and air temperatures, humidity levels and dew point readings during both the application and curing processes. Full material warranties cannot be provided unless all the relevant data has been recorded accurately. If in doubt consult the HYCHEM technical department for advice.

Wear gloves, eye protection, mask and overalls during mixing and application. Ensure there is adequate ventilation and avoid breathing the vapour.

12 months from date of manufacture, stored under shelter at 25°C in the original un-opened container.

The packaging must be stored properly in original, unopened and undamaged sealed packaging, in dry conditions at temperatures between 5°C and 30°C.

• To ensure that all holes have been filled it will be necessary to apply E500T over the entire primed surface before the application of the protective topcoat.
• The designated coating must be applied within 24 hours of the E500T application.
• To minimise an unsatisfactory cure, observe 21°C and less than 85% humidity, or 10°C and less than 75% humidity.
• Attention needs to be paid to the substrate temperature, which should be at least 3°C and preferably 5°C above the dew point during the curing phase.