TIPS FOR USE PFU 1030-F FABRIC PRIMER The PFU 1030-F Primer is a revolutionary new product for the aircraft covering enthusiast. It is unique in flame/flash resistance properties. With its inherent flexibility and chemical resistance PFU 1030-F is unique in the fabric covering industry. It provides a good base for Air-Tech color. Please consider these points as you complete your project: 1. Spray gun choice – Any good quality commercial spray equipment will work including HVLP. Choose the right tip, nozzle and aircap – normally that recommended for medium weight material. 2. Follow safety precautions regarding breathing apparatus. Polyurethanes use isocyanantes as catalyst.
Any paint or dope contains solvents and harmful vapors so be smart. 3. Clean the fabric; primer will not stick to a soiled or greasy cloth. 4. The first coat can be sprayed or brushed. Brushing on the lightweight fabrics is recommended as weave pores are not uniform after shrinking. Brushing a coat can effectively seal the fabric and ensure good penetration or soakage. Thin this coat to avoid brush marks and a lot of sanding! 5. When spraying apply the coats “wet”. Do not use a tack coat. Wet coats allow urethanes to flow and level properly. Spray surfaces horizontal if possible for best leveling. Do not load up or spray excessive amounts. 6.
The primer has a relatively short pot life so mix small quantities. Remember that as temperatures increase pot lives shorten. In cool temperatures (below 70F) use ACC 1030 accelerator for proper cure. 7. Up to about 85 F use RT 4070 Rev. 4 thinner; above 85 F use RT 4085 Rev. 4. 8. When adding thinner add only the amount necessary to give the proper viscosity for your paint conditions and equipment. The recommendations are based on normal situations but yours may be slightly different. 9. The primer can be applied all at once but does seem to work better if only two coats are applied and the third coat is applied the next day after a light sanding. The color seems to stand up better. 10.
If any pinholing is noticed flood the pinholes out to eliminate them. After the primer dries pinholes can be filled with brushed on primer. Pinholing occurs if the fabric is not glued down on hard surfaces such as leading edges or if the fabric is shrunk in an uneven fashion making the pores all different sizes. 11. For best curing always ventilate the interior cavities of parts which are totally enclosed ie. Wings, tail feathers. This will ensure curing from the back side also and will remove solvent vapors trapped in the part. These vapors would attack the primer if not ventilated inhibiting cure. Air through a drain hole or inspection port will help a great deal. 12.
The primer may now be topcoated with Air-Tech color. Apply the color within 5 days or an overall sanding of the primer surface is necessary for adhesion. Lastly, there are no real surprises in the use of PFU 1030-F; just use good painting practices the instructions and these tips as a guide. However, if you have questions and are uncertain it is much better to call us and ask than to rework a mistake. We are ready to help anytime!