At PPG, we strive to develop innovative new technologies that make the application of our products easier and

more efficient.

Dome-sealing of aircraft fasteners can be costly and time-consuming. Fasteners can be hard to reach or even

see, and there is significant variation in sealant application from fastener-to-fastener.

PRC

SEAL CAPS are the aerospace industry’s easiest way to seal fasteners. PRC

Seal Caps are delivered

as pre-cured, pre-formed sealant in a specified size and shape customized to your application. To apply, wet

sealant is extruded to the inside of the cap and placed onto the top of the fastener, allowing excess sealant in

the cap to squeeze out around the base.

For the most efficient method of sealing fasteners, use PRC

Seal Caps that are pre-mixed and frozen (PMF).

PMF caps are pre-filled and then frozen at one of our application support centers, then delivered directly to the

customer’s location. Simply thaw the caps for several minutes and place on your fasteners. No additional wet

sealant is necessary.

With PRC Seal Caps, application times are reduced by up to 90% and seals are perfect every time. The

following tables provide the measurements of many of our current seal cap configurations and can be used

to help determine a size that fits your application. For an on-fastener fit check, please contact your account

manager or local application support center.

Standard PRC Nut Plate Caps are also available both in regular pre-formed and PMF versions.

A variety of specialty sizes are listed in this guide.

Example of PRC Seal Cap (left) and Standard PRC Nut Plate Cap (right) drawing dimensions

Standard cap size 6