Neoprene is a material widely used in the manufacture of wetsuits, gloves, and boots. But is neoprene waterproof?
What is Neoprene?
Neoprene is a synthetic rubber invented in the 1930s by Wallace Carothers. Made from chloroprene, it is known for its strength, flexibility, and ability to withstand temperature changes.
Is Neoprene Waterproof?
Wetsuit neoprene is waterproof in the sense that water does not directly pass through it. However, a wetsuit is not completely waterproof because seams can let water through, and openings (neck, limbs) can also allow water to enter.
The degree of waterproofness depends on the material's density and manufacturing technologies.
Properties of Neoprene
- Weather and Ozone Resistance — Resists UV, rain, wind
- Heat Resistance — Maintains its elastic properties at high temperatures
- Oil and Solvent Resistance — Good chemical resistance
- Elasticity — Returns to its original shape after stretching
"Foamed" Neoprene
Traditional manufacturing involves whipping the chloroprene polymer to create a foam with small nitrogen bubbles. These bubbles make the material porous and therefore permeable. Wetsuits still keep you warm thanks to a thin layer of water warmed by the body.
"Laminated" and "Membraned" Neoprene
Lamination
Application of a thin layer of fabric (polyester, nylon) on one or both sides. Improves resistance and waterproofness, but does not make it completely waterproof.
Membrane
Combination with a polyurethane or PTFE membrane for a waterproof and windproof barrier. Used for protective clothing where total waterproofness is required.
Thus, standard neoprene is not entirely waterproof, but can be modified to offer a high degree of waterproofness depending on the application.