FRP square tubes are made from unsaturated polyester resin, glass fiber yarn, and mat through a pultrusion process. The process is irreversible and can't melt or reform.
FRP square tubes are different from thermoplastics and are made from high-quality thermosetting resin. They are more stable and safer to place than round tubes.
FRP square tubes have the following structural benefits:
Strength: FRP is just as strong as steel, but only a fraction of the weight.
Elasticity: Steel has no flex and is susceptible to damage from harsh impacts.
Durability: Steel rusts, wood rots, and regular polymers can shatter or warp.
FRP square tubes are available in standard tubing sizes, including ¾”, 1”, 1.125”, 1.144”, 1.25”, 1.50”, 1.75”, 2” and 3: diameters. Tubes can also have thicknesses ranging from 0.080 inches (2.03mm) through 1” thick (25.4mm).
FRP square tubes are easy to paint, but the process depends on both the solution in question and the desired finish. First, you clean the profile of all grease and dust. If you want a higher quality finish, you can prime the profile.