What's the difference between water-swellable waterstops and ordinary rubber waterstops?

Hello, what's the difference between water-swellable waterstops and ordinary rubber waterstops?

Before pouring and burying concrete, the rubber water stop should be kept flat at the joint, and the joint should be bonded and fastened. Then, the rubber water stop should be positioned by fully pouring and properly vibrating concrete, so that it can be well combined with concrete, so as not to affect the water stop effect. Water-swellable waterstop will gradually swell when it meets water, and finally it will slowly block the capillary holes all over the place, so that it will have closer contact with the concrete interface, thus generating greater water-resistant pressure and forming waterproof plastic colloid. This product has the characteristics of high expansion rate and strong mobile supplementary performance. After being placed in the construction joint, it has a strong self-healing function and can automatically block the new tiny cracks caused by settlement. For the completed project, such as joint leakage, I hope I can help you, thank you.