Fiberglass-Repair.com
Catalyst Concentration Chart For MEK Peroxide
(by volume)
1 Pint
1 Quart
1 Gallon
5 Gallon
Temperature
1/2%
CC Oz Tbsp
3 - -
5 1/8+ 0-1
20 5/8 1-1
95 3 1/4 6-2
98' and Up		 3/4%
CC Oz Tbsp
4 1/8 -
7 1/4 0-1+
30 7/8 2-0
140 4 3/4 9-2
88'		 1%
CC Oz Tbsp
5 1/8+ 0-1
9 1/3 0-2
40 1 1/4 2-1+
185 6 1/2 13-0
78'		 1 1/2%
CC Oz Tbsp
7 1/4 0-1+
14 1/2 0-1
60 2 3-2
280 9 3/4 -
73'		 2%
CC Oz Tbsp
9 3/8 0-2
18 5/8 1-1
80 2 1/2 5-0
370 13 -
68'
Never catalize less than 1/2%
Specific Gravity MEK Peroxide= 1.13
 About Tsbps.... First number is tablespoons.. Second is teaspoons.... 0-2 is ..  Zero tablespoons + two teaspoons...  a + means a little more..

Catalyst Concentration Chart For MEK Peroxide
(by weight)
1 gallon polyester resin = 9.2 pounds          1 gallon gelcoat = 10.5 pounds

Volume Resin Gelcoat
0 3/4% 1% 1  1/2% 1  1/4% 1  1/2% 1  3/4%  2%
1 oz 4 drops 6 drops 9drops 8 drops 10 drops 12 drops 14 drops
2 oz 9 drops 12 drops 18 drops 16 drops 20 drops 23 drops 26 drops
4 oz 17 drops 23 drops 35 drops 32 drops 39 drops 46 drops 53 drops
8 oz 1.75 cc 2.3 cc 3.5 cc 3.5 cc 4 cc 4.6 cc 5.3 cc
1 Pint 3.5 cc 5 cc 7.5 cc 6.5 cc 7.8 cc 9.3 cc 10.65 cc
1 Quart 7 cc 10cc 15 cc 12.50 cc 15 cc 18.6 cc 20 cc
1 Gallon 30 cc 45 cc 60 cc 50 cc 60 cc 70 cc 80 cc
5 Gallon 150 cc 200 cc 300 cc 250 cc 300 cc 350 cc 400 cc

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