System VI Tech Tips
Helpful Hints for the Superflite Urethane System

- Before apply any fabric primer be sure the fabric is completely clean and completely dry.  Contamination (pinholing, fisheye, etc.) can occur if it isn't.  - The U500 (glue) should NOT be applied over all the fabric.  Only use it as an adhesive for the fabric and tape application.  It is not designed to be a fabric filler.  - The U500 SHOULD, however, be brushed onto the fabric in all areas where the fabric is in direct contact with solid structure, such as leading edges and fuel tank bays.  This will help seal the fabric to the structure and help prevent "wicking" fo the primer-filler.  - When mixing the fabric primer mix the components in the following order:  SF6500 Primer Base, SF6600-08 Primer Catalyst, SF6700-08 Flex Agent, and the SF6800-series Reducer.  Adding the flex agent or the reducer BEFORE the catalyst can throw off the mixing ratios and drying time.  Always add the catalyst to the primer base before any other components.  - The first coat of fabric primer needs to be very thin and very light.  This allows the primer to soak into the weave of the fabric.  Spraying too heavily on the first coat can result in cracking problems later.  Before to following the viscosity requirements very closely.  - There will be pinholing between the first and second coats of primer.  This is normal.  Wet sanding with 320-grit and a heavier second coat of primer generally takes care of the problem.    - To achieve an even higher gloss in your topcoat, wet sand with a 320-grit in between the first and second coats of paint.  - If you've found that you've mixed too much product and won't be able to use it all, place it in the freezer.  Freezing an already catalyzed batch of primer or paint can extend the pot life of that product by another 2 or 3 days.  Just before to bring the product back to room temperature before spraying it.  Cold product has a tendency to run when it's sprayed.