Did you find that it is too fast for application?

The data sheet says 2% for usual 20 Degrees C, if you could reduce it to 1.5% as a test but then you should also compensate for the lesser catalyst% and make your cure temp a bit higher, maybe 25 degrees. Remember that even though it may seem to work out that if it is under cured then there is a chance that your new mould may stick to it regardless of release agents etc. 

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