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Thorough mixing of catalyst into resins and gelcoat is very important. Also the correct additions should be observed to maintain good results. Dispensers are advised for accuracy. The table below gives the correct ratios of catalyst to resin and gelcoat by weight. 1% is considered a slow mix, 2% is ideal, 3% is a fast mix. Additions outside these bands in not advisable for proper curing, in fact adding more than 4% may result in a failure to cure. The pot life of these mixes is also determined by temperature. The higher the temperature the faster the cure. As a general guide 2% addition at 20ºC gives 15-20 minutes pot life. The resin will always cure quicker if left in a mass such as the mixing bucket or in castings.


Catalyst Mixing Ratio

RESIN WEIGHT
Addition of Catalyst (ml)
50g
100g
250g
500g
1kg
5kg
1%
0.5
1
2.5
5
10
50
2%
1
2
5
10
20
100
3%
2
3
7.5
15
30
150


For measuring we supply a 10 ml syringe or 15ml & 80ml dispenser bottles.

For measuring tiny amounts, a medical eye-dropper may be used. A plastic teaspoon, not metal, can also be used. 1 tsp. = 5ml


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