Low Density Composite Surfacing Film AF 325 • AF 325LS

Technical Datasheet

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Cure Cycle

Suggested Cure Cycle

Temperature rise rate between 2-20°F per minute (1-10°C per minute)

Vent vacuum when the autoclave pressure reaches approximately 15-20

PSI (0.10-0.14) Hold 60 - 90 minutes at 250°F (121°C) or 350°F (177°C)

with 10 PSI (0.07MPa) pressure.

Suggested Finishing

Techniques

Proper use of the film can help reduce or eliminate most of the material and labor

involved in typical fill and sand operations. Simple sanding to remove mold release

agents is all that is normally required prior to application of filler primer.

1. Wipe off the tool release coating from the cured film surface using unsized

cheesecloth and a general purpose cleaner.* Wipe dry with unsized cheesecloth.

*Note: When using solvents, extinguish all ignition sources, including pilot lights.

Read and follow manufacturer’s precautions and directions for use.

2. Composite parts surfaced with the film can be finished with either hand sanding

or machine (dual-action) sanding methods.

a. Hand Sanding

i. Use only 320 grit or finer open coat abrasives. Coarser grits may cause the

formation of pinhole defects in the adhesive surface.

ii. Wet sand with water using moderate pressure until the desired finish is

achieved. 10-20 strokes is typical.

b. Machine (Dual Action) Sanding

i. Use only 320 grit or finer open coat abrasives. Coarser grits may cause the

formation of pinhole defects in the adhesive surface.

ii. Wet sand with water using moderate pressure until the desired finish is

achieved. 1-2 passes will be typical.

3. Panels surfaced with the film can be primed and painted using standard aerospace

painting and finishing procedures.

Note: The following technical information and data should be considered representative

or typical only and should not be used for specification purposes.