EVA (ethylene vinyl acetate) waterstop is manufactured from polyvinyl chloride, EVA resin and a variety of additives by special production processes. It is used for water leakage and permeation prevention in building construction joints by taking advantage of elastic deformation property of elastomer material. EVA waterstop is highly resistant to corrosion and it has very long life span. It can be used for various above or under ground buildings and it is especially suitable for water storage structures, such as water reservoirs, waste water treatment plants, dams, subways, tunnels, retaining walls, swimming pools, bridges and culverts.
EVA waterstops are manufactured in many shapes, such as ribbed with center bulb, split ribbed with center bulb, flat ribbed, split ribbed, dumbbell with center bulb, split dumbbell with center bulb, dumbbell, split dumbbell, base seal and tear web. The different shapes make EVA waterstops widely used in different kinds of concrete structures.
Features of EVA waterstop:
Resistant to abrasion.
Resistant to corrosion and chemicals.
Excellent elasticity.
Excellent waterproof performance.
Resistant to weather and excellent durability.
The specification of EVA waterstopItemParameterTensile strength at break (MPa)≥ 16Elongation at break (%)≥ 550Tear strength (kN/m)≥ 60Watertightness (30 min without leakage) (MPa)0.3Cold bending (°C)≤ 35Stretching and shrinkage amount of heating (mm)Stretching< 2Shrinkage< 6Hot air aging 70 °C × 168 hTensile strength retention at break (%)≥ 80Elongation retention at break (%)≥ 70100 % elongation appearanceWithout crackAlkali resistance 110% Ca(OH)2normal temperature 168 hTensile strength retention at break (%)≥ 80Elongation retention at break (%)≥ 90
Application of EVA waterstops:
They are used for basements and retaining walls.
They are used for subways, tunnels and culverts.
They are used for bridges, dams, canals, water reservoirs and aqueducts.
They are used for storage tanks and swimming pools.
They are also used for water and waste water treatment plants.
