In fabric covering, why is a retarder used?

In the context of fabric covering for aircraft, a retarder is used primarily to slow down the drying time of the finishes or adhesives. This extended drying period offers several advantages during the application process. By prolonging the drying time, it allows for better leveling and more thorough penetration of the adhesive into the fabric fibers, which contributes to a stronger bond. Additionally, a slower drying time can help prevent issues such as bubbling or uneven application that might arise if the material dries too quickly.

The use of a retarder is particularly beneficial in warm or low-humidity conditions where products might dry faster than desired. This ensures that the technician has adequate time to work with the material and achieve a quality finish, which is crucial for the integrity and performance of the fabric covering on the aircraft.