SikaCor®-146 DW

• Fulfils the requirements of the assessment basis/guideline of the German Federal Environment Agency (Umweltbundesamt UBA) for product hygiene suitability for drinking water according to system 1+ with external monitoring.
• Tested according to DVGW (German Association for Gas and Water) worksheet W 270 (growth of micro-organisms in drinking water).
• Physiologically harmless
  (expert report by Eurofins Institute Nehring).
• Monitored by KIWA NL in accordance with BRL-K 759 as a certified coating for contact with drinking water.
• Coating based on epoxy resin for concrete protection according to EN 1504-2, DoP, with CE-mark.

2 years

In originally sealed containers in a cool and dry environment.

~1.35 kg/l

~100 % by volume
~100 % by weight

Depending on the medium, available upon request.

No long term resistance to ozone containing media.

Dry heat up to approx. + 100°C

Min. + 15°C

Max. 80 %, surface temperature must be at least 3 K above dew point.

Min. + 15°C

Concrete: Max. 4 % by volume (CM-measuring)

Curing at + 20°C

Min. 8 h at + 20°C
Max. 72 h at + 20°C

The coating surface must be prepared by sweep-blasting in case of a longer waiting time.

Coatability
With itself, others on enquiry.

Final drying time

The following periods should be observed for potable water tanks:

10 to 14 days at a substrate temperature of + 20°C.

SikaCor®-146 DW may only come into contact with potable water if it has been ascertained by testing that the coating is cured to the extent that it can not effect the potable water quality.

On putting the containers/plant components into operation, the DVGW directives (German Association for Gas and Water) governing cleaning and disinfection as well as the applicable potable water regulations, in particular §11 'List of treatment agents and disinfection procedures', must be observed.

Material consumption on steel

Theoretical material-consumption / coverage without loss for medium dry film thickness:

Layer thickness range: At least 300 μm up to max. 800 μm per coat

(spraying)

Material consumption on concrete

A) System with polymer cement concrete (PCC) base coat:

Levelling

1^st layer (work well into the substrate)

2^nd layer airless sprayed

or 2^nd / 3^rd layer manually by brush or roller

B) System with quartz sand:

SikaCor®-146 DW filled with quartz sand and thixotropic agent can be used to prepare the substrate as an alternative to levelling with PCCs.

Levelling with SikaCor®-146 DW up to 2 mm

Topcoat airless sprayed

Levelling with SikaCor®-146 DW up to 4 mm

Topcoat airless sprayed

The data for levelling using SikaCor®-146 DW are approximate values and are influenced by the texture and porosity of the surface as well as the surface roughness.

Concrete and cement plaster:

The surface areas to be coated must conform to the building standards and must be capable of bearing loads, firm and free from bond-impairing materials. The average tensile strength according to DIN 1048 should be at least 1.5 N/mm² and must not fall below the lowest individual value of 1.0 N/mm². In the case of high mechanical loads, the average nominal value is 2.0 N/mm² and the lowest individual value 1.5 N/mm². Suitable preliminary coatings compatible with the system are to be used.

The respective overcoating times must be observed.

Steel:

Removal of welding sputter, grinding of welding seams and welding seam overlaps in accordance with DIN EN 14879-1.

Blast-clean to surface degree Sa 2 ½ according to ISO 12944-4.

Free from dirt, grease and oil.

Average surface roughness R_Z ≥ 50 μm.

Stainless steel and aluminium:

Cleaning and homogeneous roughening by means of sweep blasting, ISO 12944-4 with non-metallic blasting abrasives.

Average surface roughness R_Z ≥ 50 μm.

Stir component A mechanically before mixing. Add components A+B carefully in the prescribed mixing ratio before processing. To prevent splashing or spilling of the liquid, combine the components with a variablespeed electric mixer (stepless regulation) at a low speed for a short period. Then increase the speed to maximum 300 rpm for intensive mixing. The mixing duration is at least 3 minutes and is complete when the two components have combined to form an homogenous mixture. Decant the mixture into a clean container and mix again once more as described above. Wear suitable safety gloves, a rubber apron, a long-sleeved top, work trousers and tightly-fitting safety goggles/face guard when mixing and decanting the products.

Instruction on initial filling
Before filling the coated tanks or pipes for the first time with potable water or foodstuffs, purging or rinsing with water for at least 1 day.

The specified dry layer thickness is achieved using the airless-spraying process. Achieving a standard layer thickness and even appearance depends on the application process. Spray applications generally produce the best results. If applying with a paintbrush or roller, further application may be required to achieve the necessary coating thickness depending on the design, local conditions and colour. It is good practice before starting the coating application to test a sample area to determine whether the results of the selected application process meet your requirements with the product in question.

Do not thin SikaCor®-146 DW!

Brush or roller:

• Any bubbles should be removed with a flat surface brush
• Several applications (usually 3) are necessary in order to reach the layer thickness of 400 μm
• On a mineral substrate the first coat of SikaCor®-146 DW must be applied manually. Taking care that SikaCor®-146 DW is worked well into the substrate when doing this. This is usually done with a flat surface brush or a paintbrush
• The substrate must be pore-free after the application of the first layer

Only mix the quantities which are to be applied in due time.
Consider the fast curing properties of SikaCor®-146 DW!

Airless spraying:

• High performance airless device
• Peak pressure in spray gun at least 180 bar
• Remove sieves. Direct suction (without suction hose)
• Nozzle size 0.48 - 0.58 mm
• Spraying angle e.g. 50°
• Spray hoses ⅜”, max. 20 m, from spray gun ¼” approx. 2 m
• Material temperature at least + 20°C
• At low temperatures we recommend the insulation of the spray hose as well as the use of a continuous flow heater, particularly in case of long spray hoses

Repair:

• Clean flaws or damaged areas, grind or sweep-blast overlapping areas to a matt finish and clean off all traces of dust
• Overcoat immediately afterwards

Sika® Thinner E+B