|
The
following charts give the quantity of MEKP peroxide catalyst
in cubic centimeters to be used with either a gallon or quart
of polyester coatings.
All
catalization of polyesters is based on weight, not volume.
These charts are very close approximations of the conversion
of weight to volume, that is, of grams to milliliters. Most
polyester products have the weight per gallon on the containers.
Good guidelines for gel coat weight per gallon are as follows:
Whites
- 11 pounds per gallon
Black & other - 10 pounds per gallon
Clear - 9 pounds per gallon
Under-catalyzing
will severely affect the quality of the final product, and
over-catalyzing will create production difficulties and waste
money unnecessarily.
As
the chart indicates, different coatings do require different
levels of catalyst to maintain the proper percentage. Please
use these as guidelines for better parts:
One
Quart
|
Wt./gal
|
2.0%
|
2.5%
|
3.0%
|
3.5%
|
|
11 lbs.
|
25cc
|
31cc
|
37cc
|
44cc
|
|
10.5 lbs.
|
24cc
|
30cc
|
36cc
|
42cc
|
|
10 lbs.
|
23cc
|
28cc
|
34cc
|
40cc
|
|
9.5 lbs.
|
22cc
|
27cc
|
32cc
|
38cc
|
One
Gallon
|
Wt./gal
|
1.5%
|
2.0%
|
2.5%
|
3.0%
|
|
11 lbs.
|
75cc
|
100cc
|
125cc
|
150cc
|
|
10.5 lbs.
|
71cc
|
95cc
|
119cc
|
143cc
|
|
10 lbs.
|
68cc
|
91cc
|
113cc
|
136cc
|
|
9.5 lbs.
|
65cc
|
86cc
|
108cc
|
129cc
|
|
