1. VELOSIT ® WS 801 Applica'on fields VELOSIT WS 801 is a water swellable waterstop used for waterproofing of construc?on joints. Typical applica?on fields besides others are as follows: • Waterproofing of construc?on joints between different concrete pours • Waterproofing of saw cut joints • Waterproofing of pipe penetra?ons • Waterproofing of the wall-slab joint • Swellable waterstop for the treatment of construc?on joints between concrete pours. VELOSIT WS 801 swells even with sewage water containing elevated salt loads. Proper'es VELOSIT WS 801 is a waterstop that swells under contact with water. It is applied on the previous concrete pour into the center of the construc?on or expansion joint. VELOSIT WS 801 is nailed to the concrete. • 1000% swelling capacity, fully reversible for an unlimited number of cycles • Dimensional stable, no wash-out like with Bentonite waterstops • Retarded swelling, volume increase starts several hours aQer water contact • Swelling pressure of > 5 bar (73 psi), extreme resitance against hydrosta?c pressure • Resists 50 m (160 Q.) water pressure acc. to EN 12390-8 Applica'on 1.) Substrate prepara'on VELOSIT WS 801 is suitable for reinforced joints in concrete bodies. Remove separa?ng and bondbreaking substances from first concrete sec?on (for example founda?on and slab). Surface should be open porous and load bearing. Minimal strength requirement is 15 MPa 1420 Page of 1 3 VELOSIT ® WS 801 Highly Swellable Joint Waterstop Application fields VELOSIT WS 801 is a water swellable waterstop manufactured from a blend of proprietary thermoplastics and swelling agents compounded to produce a re-swellable waterstop of unique swelling ability. VELOSIT WS 801 is engineered to reduce pocketing on the sides. VELOSIT WS 801 is used to seal construction joints. Typical application fields include : • Waterproofing of construction joints between concrete pours • Waterproofing of saw cut joints • Waterproofing of pipe penetrations • Waterproofing of the wall-slab joints Properties VELOSIT WS 801 thermoplastic waterstops gradually swell when in contact with water. VELOSIT WS 801 is either glued with an adhesive or nailed to the existing hardened concrete prior to pouring of fresh concrete. VELOSIT WS 801 exhibits many unique properties including: • Profile engineered to increase keying with fresh concrete; centrally placed “V” in addition to rounded edges for reduced risk of pocketing • + 1000% swelling capacity in potable water; fully reversible for an unlimited number of cycles • + 750% swelling capacity in sea water • Dimensionally stable; does not wash-out like Bentonite waterstops • Delayed swelling; volume increase starts several hours after water contact, reaching full swellability in 8 days • Swelling pressure of > 5 bar (73 psi), extreme resistance against hydrostatic pressure • Resists 50 Bars or 50 m water head (160 ft.) when tested to EN 12390-8 VELOSIT ® WS 801 High Swellablity Thermoplastic Waterstop

2. VELOSIT ® WS 801 (2175 psi). Patch larger surface defects with VELOSIT RM 202. 2.) Processing Due to its enormous swelling pressure VELOSIT WS 801 must be installed min. 50 mm (2”) from each edge. Do not use VELOSIT WS 801 on concrete walls of less than 120 mm cross-sec?on. Fixing with nails: VELOSIT WS 801 can be nailed to the first concrete sec?on. Shoot nails each 15 cm (6”) with a nail gun (for example Hil? DX 76) through VELOSIT WS 801 into the concrete. Cut overlaps, crossings or termina?ons of the waterstop in a 45° angle and connect without a gap. Hollow areas of more than 4 mm may reduce water?ghtness significantly. Plas?c pipes can only be treated with VELOSIT WS 801 up to DN 50 (2”) with cold water and up to DN 25 (1”) for more than 30°C (86°F) water temperature. Due to the high swelling pressure plas?c pipes may collapse under load. Larger diameters are only permifed with metal pipes. 3.) Curing VELOSIT WS 801 does not require curing. Avoid standing water on the waterstop as this may result in apremature swelling of the material. Because of the retarded swelling a short term contact with rain water is not a problem. Es'ma'ng The required amount is calculated with the planned length of the joint waterproofing. Cleaning VELOSIT WS 801 does not cause any dirt. Dirty material can be cleaned with a moist cloth. Do not install material that has already swollen. Wait un?l the material has completely dried and achieved its original dimensions. Quality features Color: blue Dimensions: 5 x 20 mm Weight: 0.12 kg/m (0.24 lb./yd.) Substrate temperature: 5 – 35°C (40 – 95°F) Water impermeability acc. EN 12390-8: - Posi?ve side: 5 bar (73 psi) Water absorp?on: 1.2 kg/m (2.4 lb./yd.) Maximum swelling - potable water: 1060 % - sea water: 750 % - saline water: 580 % Packaging VELOSIT WS 801 is supplied in rolls á 50 m (163’). 5 rolls are packaged in a box (approx. 27 kg/59lbs.). Storage VELOSIT WS 801 can be stored in unopened original packs for 5 years at 5 – 35°C (40 – 95 °F) in a dry storage place protected against sunlight.

3. VELOSIT ® WS 801 Safety Please observe the actual valid material safety data sheet and follow the described safety measures for handling of the product. Recommenda'ons VELOSIT WS 801 is only available for professional applicators. All described product features are determined under controlled laboratory condi?ons according to the relevant interna?onal standards. Values determined under job site condi?ons may deviate from the stated values. Please always use the latest version of this data sheet available from our website www.velosit.de . Manufacturer VELOSIT GmbH & Co. KG Industriepark 7 32805 Horn-Bad Meinberg Germany www.velosit.de