Sikaflex® Tank N

Sikaflex® Tank N conforms to LEED® v3 IEQ credit 4.1

• VOC content < 420 g/l (US EPA method 24)

• European Technical Approval ETA-09/0272

Polyurethane

Sikaflex® Tank N has a shelf life of 12 months from the date of production, if it is stored in undamaged, original, sealed packaging, and if the storage conditions are met.

Sikaflex® Tank N shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C and +25 °C.

The following is a list of liquids for which the joint-sealing system is impermeable and resistant for up to 72 hours (medium duty). For these liquids Sikaflex® Tank N is approved according to TRwS (Technical Rules on substances Hazardous to Water) for sealing in storage / filling / handling facilities for water-polluting products.
 

*As specified in approval guidlines for joint-sealing systems in storage / filling / handling facilieites for water-polluting liquids, Part 1.

See DIBt (German Institute for Construction Technology) documentation, Book 16.1.

-40 °C min. / +70 °C max.

The relevant technical rules for joints with elastic sealants have to be considered.

 
All joint sealing in storage / filling / handling facilities for water-polluting liquids and in water pollution control have to be made according to the technical approval for Sikaflex® Tank N (ETA-09 / 0272) and its annexes. To avoid damage to sharp edges in in-situ concrete a chamfer (approximately 3 – 5 mm) should be made on the sides of the joint.
 

The joint width must be designed to suit the joint movement required and the movement capability of the sealant. The joint width shall be > 10 mm and < 35 mm. A width to depth ratio of 1 : 0.8 must be maintained (for exceptions, see table below).
 

Standard joint widths for joints between concrete elements

All joints must be correctly designed and dimensioned in accordance with the relevant standards, before their construction. The basis for calculation of the necessary joint widths are the type of structure and its dimensions, the technical values of the adjacent building materials and the joint sealing material, as well as the specific exposure of the building and the joints.

For larger joints please contact our Technical Department.

Use closed cell, polyethylene foam backing rods.

+5 °C min. / +40 °C max. (min. 3 °C above dew point temperature)

+5 °C min. / +40 °C max.

The substrate must be clean, dry, sound and homogeneous, free from oils, grease, dust and loose or friable particles. Cement laitance must be removed. Grinding the surface of non-porous substrates with a very fine abrasive pad may improve the adhesion performance of Sikaflex® Tank N.

The Sikaflex® Tank N joint sealing system is approved for application on uncoated liquid proofed precast concrete elements. Sikaflex® Tank N has a technical approval for use in storage / filling / handling facilities for water-polluting liquids or grade ≥ C35 / C45 ≤ C50 / 60 (EN 206-1), in-situ concrete to DIN 1045 as “FD” (liquid proof) concrete, or “FDE” (penetration-tested liquid-proof) concrete.
 

Non-porous substrates
Aluminium, anodised aluminium, stainless steel, galvanised steel, powder coated metals or glazed tiles have to be cleaned and pre-treated using Sika® Aktivator-205, wiped on with a clean towel. Before sealing, allow a flash-off time of > 15 minutes (< 2 hours).
Other metals, such as copper, brass and titanium-zinc, also have to be cleaned and pre-treated using Sika® Aktivator-205,wiped on with a clean towel. After the necessary flash-off time, use a brush to apply Sika® Primer-3 N and allow a further flash-off time of > 30 minutes (< 4 hours) before sealing the joints.
PVC has to be cleaned and pre-treated using Sika® Primer-215 applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 4 hours).

Porous substrates
Concrete, aerated concrete and cement-based renders, mortars, and brick have to be primed with Sika® Primer-215, for uses in accordance with ETA-09 / 0272, or Sika® Primer-3 N applied with a clean brush or roller. Before sealing allow a flash-off time of > 30 minutes (< 4 hours).

For more detailed advice and instructions please contact our Technical Department.
 

Note: Primers are adhesion promoters. They are neither a substitute for the correct cleaning of a surface, nor do they improve the strength of the surface significantly.

Clean all tools and application equipment immediately after use with Sika® Remover-208 and/or Sika® TopClean T. Once cured, residual material can only be removed mechanically.