NORDPUR INTERNI

Smooth polyurethane coating for interiors

Description

NORDPUR INTERNI is a bicomponent product made up of :

  • component A: a mix of polyalchols, pigments, additives and fillers;
  • component B: prepolysocyanate.

Once mixed together, the two components produce a  highly adhering material. NORDPUR INTERNI can easily be applied to different types of substrates to obtain even thin layers of a smooth coating impermeable to oil and grease and offering high abrasion resistance.

The product is available in three standard colours (red, grey and green) and is not suitable for outdoor use. Other colours are available on request, but the product has a tendency to yellow and we recommend only deep, dark colours.

Usage field

NORDPUR INTERNI is used as a coloured coating protecting from dust and grease a variety of concrete floors (hardened concrete) found in industrial warehouses, garages, etc.

It can also be used as a protective barrier against water vapour on concrete supports destined to be overlayed with wood.

Packaging

Available in 8 kg packs.

NORDPUR INTERNI

Smooth polyurethane coating for interiors

Substrates preparation
  • make sure the surface is perfectly dry;
  • new footings must have been left to set for more than a month;
  • in case of low porosity concrete floors treated with quartz dust, carry out an acid washing with NORDECAL FORTE before proceeding any further;
  • in case of old, much used floors, carry out a thorough cleaning using STRIPPER followed by NORDECAL FORTE, and finish off with mechanical brushing;
  • make sure there is no loose material on the surface that might affect product adhesion;
  • any resin leftover from previous treatments must be completely removed with a diamond wheel; proceed first with a preliminary smoothing using W3, preceded by a layer of NORPHEN SW SOLID.
Product preparation

After drying the surface:

  • pour component A into component B and mix well using a drill with the proper attachment;
  • dilute with about 30% NORDPUR SOLVENT 
Product application
  • proceed to apply the first layer with a roller, running it repeatedly over the surface in a criss-cross manner;
  • after 6-24 hours, spread a second layer of (undiluted) product.

NORDPUR INTERNI can be stored in its original container, kept tightly closed, for several days after mixing the two components.

 

NORDPUR INTERNI

Smooth polyurethane coating for interiors

Average Consumption

0.25 kg/m2 on average.

Yield: To obtain a 0.55 mm thick film you need to apply about 1 kg/m2 product.

NORDPUR INTERNI

Smooth polyurethane coating for interiors

Features

Mass per volume, UNI 8310

g/cm3

1.15 ± 0.05

Surface drying time, UNI 8904

Hours

6 ± 2

Minimum film forming temperature

°C

> +3

Impermeability to water UNI 8202/21

Kpa

³ 500

Steam permeability, DIN 52615

m

< 4×104

Adhesion to concrete (pull-off test), ASTM D 4541

Mpa

> 3,5

Abrasion resistance, UNI 8298/9

Mg

< 90

Hardness (Buchholz)

---

> 60

A : B  ratio

3.7 : 4.3

Note: test data refer to quoted regulations.

Chemical resistance, UNI EN ISO 2812-1 (method 2)

30% hydrochloric acid in water

4

10% sulphuric acid in water

4

20% phosphoric acid in water

4

30% acetic acid in water

2

15% ammonia in water

5

30% caustic soda (sodium hydroxide) in water

2

3.5% hydrogen peroxide (12 volumes)

4

Mix of 1% acetic acid and 0.5% hydrogen peroxide in water

5

Denatured ethanol

4

Cyclohexane

5

Solvesso 100

5

Ethyl acetate

1

Industrial acetone

1

(1 = product disintegration, 5 = no alteration; for the full range see appendix A)

NORDPUR INTERNI

Smooth polyurethane coating for interiors

Warning and informations
  • Please note: we recommend applying < 200m thick wet films at a time.
  • Read the safety card.
Preservation

Store in a dry place at temperatures between +4°C and +30°C; stable for 6 - 8 months.