I think SAMPLE QUICK of BUEHLER is good enough....
Use followig technic...

1. Rinse the sample with soap and hot water to remove any oily stuff and dry
by
    hot air.
2. Mount vertically in a mould
3. Make thinner  mix and pour very little to cover the base and to fill cut
holes.
4.After 10 minutes, pour another mix as  usual thicker..and further in usual
way..
5. This is known TWO POT PROCESS,  First pot to wet and second pot to fill

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