Acrylic vs. Epoxy
Epoxies are exceptionally durable due to their hardness and solvent resistance. Compared to other materials, epoxies can withstand particularly harsh environments and are thus suitable for ruggedizing PCBs in places like oil fields, on marine freighters, or under engine hoods. That being said, processing epoxies can be cumbersome, as they require measuring, mixing, and careful monitoring of their pot life. By contrast, simple 1-part acrylic systems that require only thinning can be more robust.