Just as sensitive as the resin is to temperatures, the hardener also reacts to contact with air. Tip #4: The Role of Humidity in Processing In addition, the dew caused by the temperature differences can negatively influence the quality of the surface of the material. If you use epoxy resin outdoors, you should keep in mind that the curing time can also be considerably longer if the temperature drops during the night. At very high temperatures it is, therefore, advisable to opt for a product with a longer processing time. And this applies not only to the time of curing, but also to the time in which the material is to be further processed. At ambient temperatures above 20 ° C., the reaction time of the resin increases significantly.If the temperature drops significantly below 20° C, it is also possible that the resin begins to crystallize. And this removal can be extremely laborious. This must first be removed before the epoxy resin can be further processed. In addition, a waxy layer, the so-called amine reddening, can form on the surface. At ambient temperatures below 20° C., the resin cures much slower.Therefore you should also keep an eye on the ambient temperature when mixing the resin. Then you can add the exact same amount of hardener.Ĭasting resin is a very heat-sensitive material. This allows the surface of the material to level out. First, put the resin into the measuring cup and wait a short moment. The scale of the measuring cup used should have the smallest usable increments possible to enable accurate measurement. In this case the density of the corresponding material is irrelevant. Tip: Use a measuring cup to measure the resin and hardener by volume when mixing the components. This problem increases the more volume you mix. If the two components are now measured by weight using a scale and mixed in a ratio of 1:1, it is possible that the mixing ratio is actually incorrect because they have different weights. This means that they do not necessarily have the same weight. Tip #2: Mixing by Volume instead of by Weightĭepending on the manufacturer, it is possible that the resin and hardener differ in density. Our epoxy resin calculator will help you determine the optimum mixing ratio. If you do not follow these instructions, the resin may not work as desired or may not cure in the end. In addition to the usual specifications of resin and hardener in a ratio of 1 : 1 or even 2 : 1, the manufacturer’s specifications sometimes also include much more complicated variants such as 100 : 45.įor this reason, you should read the manufacturer’s instructions on the packaging carefully before you start mixing. 13 Our Conclusion on mixing Epoxy Resinįirst of all, when mixing epoxy resin, you should be aware that the resin can have different mixing ratios depending on the manufacturer.12 Tip #12: Use sufficiently large Containers for Mixing.11 Tip #11: Never add Water to the Epoxy Resin.10 Tip #10: Observe the recommended Mixing Ratio.9 Tip #9: Use only compatible Colorants.7 Tip #7: Only use high-quality Epoxy Resins.6 Tip #6: The right Tool for Mixing the Components.5 Tip #5: Careful Mixing the Components.4 Tip #4: The Role of Humidity in Processing.2 Tip #2: Mixing by Volume instead of by Weight.
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