Item #: SF6500-04. For use on fabric-covered aircraft. Superflite primer/filler is a catalyzed polyester material with a pot life of approximately 1 hour. The mixture consists of 1 part SF6500 Primer Base, 1 part SF6600 Catalyst, 1/2 part SF6700 Flex Agent, and enough SF6820 Reducer to provide a viscosity of approximately 17 seconds through a number 2 viscometer cup for the initial coat. This thin material will penetrate the weave and provide excellent adhesion. Subsequent coats may be reduced less. FAA-approved. Shelf life of 7 years - unopened; shelf life of 1 year - opened. Comes in a 1-quart can.
The mixing ratio on the Superflite System VI fabric primer is as follows:
1 Part SF6500: 1 Part SF6600: 1/2 Part SF6700
Reduce to the following viscosities:
First Cross Coat - 17 seconds through a #2 Zahn Cup; Second Cross Coat - 23 seconds through a #2 Zahn Cup