Why Use an Epoxy Resin Mixing Ratio Calculator?
Mixing epoxy resin and hardener incorrectly is the number one cause of sticky surfaces, soft spots, and incomplete curing. Whether working on woodworking river tables, resin art, or tumblers, getting precise measurements by weight or volume is crucial for a rock-hard, crystal-clear finish.
How Resin and Hardener Proportions Work
Epoxy systems rely on strict chemical ratios. A 1:1 ratio requires equal parts resin and hardener, whereas a 2:1 ratio uses twice as much resin (Part A) as hardener (Part B). Always check whether your specific brand specifies mixing by weight (using a digital kitchen scale) or by volume (using graduated mixing cups).
Frequently Asked Questions (FAQ)
Mixing by weight using a digital scale is generally more accurate and reliable, whereas mixing by volume requires careful reading of graduated measuring cups.
An incorrect ratio will prevent the chemical cross-linking process, leaving your epoxy permanently tacky, rubbery, or completely uncured.
No! Adding extra hardener will not speed up the cure time; instead, it ruins the chemical balance and results in a weak, sticky, and ruined project.
Most standard crafting and casting epoxies become touch-dry within 12 to 24 hours, but require 3 to 7 full days to reach their maximum hardness and cure strength.
If the surface is sticky due to improper mixing, you must scrape off the uncured layer, clean the surface, and pour a fresh, correctly measured flood coat on top.