What is the primary advantage of alkyd varnish?

The primary advantage of alkyd varnish lies in its flexibility. This characteristic is particularly beneficial in aviation applications, where materials must withstand various stresses and strains during operation. The flexibility of alkyd varnish allows it to expand and contract with wood as temperature and environmental conditions change, thus minimizing the risk of cracking or peeling.

While drying time is an important factor in varnishes, alkyd varnish typically has a longer drying time compared to some other finishes, which does not support the option related to quick drying. Additionally, although alkyd varnish can provide a high-gloss finish, its flexibility is more critical in applications where wooden components are subject to movement and stress, making the other characteristics less advantageous in this context. The cost of alkyd varnish can also vary, but its flexibility is a key reason why it is often preferred for protecting wood in aviation environments.