Acetal vs. Plexi difference

What is the difference between Acetal and Plexi?

There are no differences between POM (Acetal, commercial brand name - Delrin) and acrylic glass (Plexi) top in regards to cooling performance. Although there are some visual and material differences:

- Acrylic is translucent and thus allows the visual inspection of the internals of the water block and for colored coolants to be seen inside the cooling channels.

- Acrylic glass can be damaged beyond repair when alcohol or acetone is applied to the surface, while POM (Acetal) offers higher chemical wear resistance.

- POM Acetal is softer than acrylic, and its impact strength is higher than the one of Plexi. Plexi (acrylic glass) is more brittle and more prone to cracking when mistreated.