DUOTONE SENTEX® masts are extremely light, incredibly balanced and are far superior to other masts in terms of handling and reflexes. Thanks to the revolutionary SENTEX® material structure, they are also phenomenally durable and resistant to stress, which is why SENTEX® is also used for the PLATINUM booms.

WHAT’S THE SECRET?
SENTEX® is a highly developed composite material used exclusively by DUOTONE. It contains the highest-quality Toray resins which, in combination with the carbon fibres, achieves unique durability while keeping weight to a minimum. SENTEX® masts and booms are light as a feather in your hands and are far less liable to being broken. In addition, the masts have an outstanding level of reflex and the booms are extremely stiff.

THE MATERIAL
SENTEX® is made from the highest-quality carbon fibres and resin impregnated with silicon nanospheres. This technology produces a unique material structure which is more stable and noticeably lighter than regular carbon. The key reasons for this are the two advantages of silicon nanospheres:

1. The even distribution of nanospheres in the resin creates an extremely balanced rigidity across the entire mast length and ensures incredibly immediate and balanced reflexes.
2. Silicon nanospheres deal with compression force better than any other material known. This makes our SENTEX® masts and booms at least 30 % more resilient and durable than standard carbon products.

Because SENTEX® is far more stable, not as much material is normally needed, which is why the products are lighter than similar models. More specifically, this means a weight saving of up to 20 %, which is exactly why all DUOTONE PLATINUM booms and RDM masts are the most lightweight in their class worldwide.

THE essential quality criterion of carbon fibers when used for Windsurf masts is the bending-elongation of the fiber. The elongation measures the traction during bending until the fiber finally breaks. Carbon fibers are available with bending-elongation values between T300 and up to max T1000 with the T1000 carbon being 10-times as expensive as cheap T300 carbon. The lowest quality carbon fibers used on Windsurf masts have an elongation value of T300-400. This carbon has a bending-elongation that is just slightly higher than glass fiber. Therefore it’s used on cheap “low-percentage carbon masts” only.

For a Windsurf mast this means:
The higher the bending-elongation value of the carbon fiber raw material
→ The faster the reflex speed (which ultimately increases the performance of your sail, similar to increased horse power in a car)
→ The higher the breakage strength

Most brands nowadays use T400-500 for their top-level carbon masts. At DUOTONE we use T600 carbon for all BLACK masts, T700 for all SILVER and GOLD masts, T800 for all PLATINUM masts and T900 for the PLATINUM Aero 3.0 masts.

Another advantage of the high quality carbon fibers is that you can reduce the resin content. For example the T900 fiber used for the PLATINUM Aero 3.0 mast allows us to reduce the resin content by 30%. This results in the lightest mast on earth.