You can't make any conclusions just from the fill percentage. Differences in the polymer formulation will likely outweigh everything else. Given the exact same formulation, you would expect the CF20 to be stiffer, more brittle, and have worse layer adhesion. But it's never really apples to apples, so look at the TDS and independent test results.
this post was submitted on 20 Oct 2025
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as Kopsis pointed out, the only real comparison that makes sense is the TDS.