Substrates preparation

• The surface must be dry, solid, free of loose particles (e.g.: film-forming curing agents or lacquer) and traces of oils or grease;
• based on the state of the surface, to make it clean and rough choose the type of treatment to be carried out;

- washing by means of acids;
- sanding;
- diamond grinding;
- scarifying;
- peening.

• Concrete or cement mortars must have at least 28 days of curing, cohesion of at least 1.5 MPa (direct drive) and 25 MPa compressive strength.
• The supports in epoxy resin must be roughened in order to ensure proper wetting and adhesion of NORPHEN FUND FIL.

   The maximum moisture content of the media should be 4% (carbide method according to UNI 10329).

Product preparation

• Homogenize component A in its container prior to sampling.
• Shake component B in its packaging prior to sampling.
• Pour the content of NORPHEN FONDO SL component B into NORPHEN FONDO FIL component A and mix thoroughly with a professional mixer until obtaining a homogeneous mixture.
• In case of partial use of the pack, respect the mixing ratios by weight.

Product application

Used as a skimming base coat primer:

• on deeply dry substrates apply NORPHEN FONDO FIL loaded with 30% by weight (on A + B) quartz sand 0.1-0.3 mm using a smooth steel trowel and broadcast (if scheduled) with quartz sand 0.1 - 0.6 or 0.3 - 0.9 mm.
• Used as a primer:
• apply NORPHEN FONDO FIL undiluted using a short haired roller;
• broadcast (if scheduled) with quartz sand 0.1 - 0.6 or 0.3 -0.9 mm with a consumption of approx.0.8 kg/m² ;
• remove excess sand by sanding and vacuuming.
• if a thixotropic slurry is to be obtained to either grout or seal the porosity of the substrate, add 4-5% by weight (on A + B) of EPOXY SILICA. In this case the so obtained mixture should be applied with a smooth steel trowel.

Used as a castable mass:

• add quartz sand of selected granulometry in the desired proportions (for instance, from 0.3 to 2 parts by weight on A + B of NATURAL QUARTZ 0.1-0.3 mm) and slowly mix with the impeller well immersed in the product trying to minimize air bubbles formation in the product;
• pour it onto the ground and adjust the thickness with a notched steel trowel.

Used as a binder for epoxy mortars:

• add 8-10 parts by weight of QUARTZ MIX 0.2 -1.5 mm to 1 part by weight of mixture A + B. The amount of sand should be adjusted depending on the desired consistency.

Spread the mortar with a smooth steel trowel, strike off and smooth it.

Application Conditions and Cure

Application Conditions and Pot-Life

NORPHEN FONDO FIL is characterized by considerable reactivity even when cross-linking at low temperatures.

The dough pot-life depends on the room temperature at which works are executed and on the amount of the dough. In Table 1 are shown pot-life data for 5 kg of product (A + B), with or without quartz sand:

Table 1:

 

Recoating Time

To use NORPHEN FONDO FIL as a primer and without broadcasting, the ideal time intervals before laying down subsequent finishing coats is shown in Table 2:

Table 2:

temperature (°C)	minimum time [hours]	maximum time [hours]
+8	24	48
+12	16	48
+20	6	36
+30	5	36

 

If over-application is to be carried out after the time limit, it is necessary to proceed with the broadcast of quartz sand over NORPHEN FONDO FIL, fresh on fresh.

 

Tool cleaning

• with acetone, epoxy thinner or nitro diluent, if the product is still fresh;
• by mechanical means, once the product has cross linked.

Average Consumption

Table 3 shows the consumption rate of NORPHEN FONDO FIL for the intended use:

Table 3:

Features

PRODUCT APPLICATION DATA
bulk mass, UNI EN ISO 1675	A B A + B	kg / l	1.60 ± 0.05 1.02 ± 0.03 1.40 ± 0.05
Brookfield viscosity A + B (6 RV spindle, 10 rpm), ASTM D 2196	+12 ° C +20 ° C +30 ° C	mPa.s	2000 ± 100 750 ± 80 550 ± 50
pot-life 350 ml A + B, UNI EN ISO 9514	+12 ° C +20 ° C +30 ° C	min	60 ± 2 30 ± 1 15 ± 1
Operating Temperature		°C	from -20 to +70
Application Temperature		°C	from +8 to +35
Cross-linking ratio by weight A: B		-	4:1
FINAL PERFORMANCE
compressive strength, UNI EN 12190, on A + B		MPa	70 ± 2
flexural strength, UNI EN 1015-11, on A + B		MPa	68 ± 2
adhesion to concrete, UNI EN 1542, on A + B (cohesive failure concrete)		MPa	> 3,0
compressive strength, UNI EN 12190 1 p / p A + B + 8 w / w QUARTZ MIX 0.2 to 1.5		MPa	80 ± 5
flexural strength, UNI EN 1015-11 1 p / p A + B + 8 w / w QUARTZ MIX 0.2 to 1.5		MPa	27 ± 1
adhesion to concrete, UNI EN 1542 (cohesive failure concrete) 1 p / p A + B + 8 w / w QUARTZ MIX 0.2 to 1.5		MPa	> 3.0
Shore D hardness (A + B), cure +13 ° C, 70% RH, DIN 53505	24 h 48 h 7 g	°	46 ± 1 62 ± 2 70 ± 2
Shore D hardness (A + B), maturation +25 ° C, 70% RH, DIN 53505	24 h 48 h 7 g	°	60 ± 2 66 ± 2 75 ± 2

Note: testing methods are in accordance with the standards referred to on the table. 

Warning and informations

• Mix components A and B in the precise ratio given below; in case of use of part of the package weigh the two components according to the ratio referred to on the label.
• Keep cool in the summer, to avoid an excessive increase in the reaction rate of the system.
• Keep warm in winter to prevent the occurrence of condensation and crystallization.
• Read the Material Safety Data Sheet (MSDS) before use.

Preservation

24 months in its closed original container, in a dry place at temperatures between +5°C and +35 ° C. The product is sensitive to frost.