This is also the way to add a second coat of epoxy. You should be able to sand and fill as you would any other imperfections. If the cracks are on the surface (top or bottom), or if there are few cracks inside of the epoxy, or they are only along the edge, it is possible to salvage the piece. If the cracks cause the epoxy to “shatter” essentially making it a weak piece, you would not want to use this for risk of injury and damage.This means the ratio was off, or the cure got way too hot and was unable to have the appropriate reactions.
If the epoxy did not cure fully, and is still tacky or sticky throughout the pour.First, Here are a couple of possible reasons you would not fix it:
If you ended up with cracked epoxy after a cure, don’t fear too much, there are often fixes for this. Below I will discuss how (or if) you can fix it, and ways of improving future pours. While some epoxies are made to handle this, most will heat up exponentially when poured thick. When the base resin is mixed with the curing agent, it causes an exothermic reaction and heats up greatly.
The changes and differences in tempurature throughout the pour caused expanding and shrinking, which in turn cracked the already cured areas. So, what exactly causes epoxy to crack? The most common reason is the epoxy got too hot while curing, causing it to cure faster and unevenly. Although this is not an ideal incident, it doesn’t mean you have to throw your project out right away. Maybe this is your first time being in this position – you finished letting a project cure and you went to work on it – and either it was cracked on arrival or as soon as it was handled it became this way.