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materials can be used. Substitution of other materials is forbidden and results in the aircraft being unairworthy. 

## Other Fabric Covering Materials 

The following is an introduction to the supplemental materials used to complete a fabric covering job per manufacturer’s instruction or a STC. 

## Anti-Chafe Tape 

Anti-chafe tape is used on sharp protrusions, rib caps, metal seams, and other areas to provide a smoother surface to keep the fabric from being torn. It is usually self-adhesive cloth tape and is applied after the aircraft is cleaned, inspected, and primed, but before the fabric is installed. 

## Reinforcing Tape 

Reinforcing tape is most commonly used on rib caps after the fabric covering is installed to protect and strengthen the area for attaching the fabric to the ribs. 

## Rib Bracing 

Rib bracing tape is used on wing ribs before the fabric is installed. It is applied spanwise and alternately wrapped around a top rib cap and then a bottom rib cap progressing from rib to rib until all are braced. [Figure 3-5]  Lacing the ribs in this manner holds them in the proper place and alignment during the covering process. 

## Surface Tape 

Surface tape, made of polyester material and often pre- shrunk, is obtained from the STC holder. This tape, also known as finishing tape, is applied after the fabric is installed. It is used over seams, ribs, patches, and edges. Surface tape can have straight or pinked edges and comes in various widths. For curved surfaces, bias cut tape is available, which allows the tape to be shaped around a radius. 

## Rib Lacing Cord 

Rib lacing cord is used to lace the fabric to the wing ribs. It must be strong and applied as directed to safely transfer in-flight loads from the fabric to the ribs. Rib lacing cord is 

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