Technical Data Sheet (TDS)

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EPONAL 326

Two-component epoxy resin for thick-bed flooring systems (3 to 5 mm or more)

Uses

EPONAL 326 can be used as :
 
- Coating in thick-bed industrial flooring system (3 to 5mm or more) : it is a self-smoothing resin suitable for high traffic applications (production areas in food, chemical and mechanical industry ...)

-  Float or trowel-applied repair mortar for reinforcing concrete structures (reconstructing supports of bridge decking, post heads, foundations, anchoring and coating concrete reinforced rods, blocking railroad tracks) and for badly damaged concrete substrates (foundations, floors, posts, beams, reinforced concrete walls, retaining walls...)        

 

Benefits

  • Product being a part of the system under NF EN 13813 standard
  • Solvent-free
  • No shrinkage
  • Good adhesion to most substrates including concrete, metal decking, brick, stone and timber
  • Good mechanical resistance
  • Good resistance to most commonly used chemicals
  • For repair mortars can be mixed with sharp sand (up to 1:10 by weight)
  • Available coloured or clear
  • European fire classiciation : Cfl-S2

Properties

Physical:


Physico-physical properties
 

Bostik Method
Characteristics
Resin
(Part A)
Hardener
(Part B)
Blended
00.010
Aspect
Liquid
Liquid
Liquid
00.020
Colour (*)
Clear or
coloured
Yellow
Yellow or coloured
01.052
 Specific gravity at 23°C (**)
1.08 - 1.14
1.01 - 1.05
1.06 - 1.10
01.070
Brookfield viscosity at 23°C (**)
700 – 1200
 mPa.s
300 - 400
 mPa.s
600-1200
 mPas
 
 Mixing ratio (clear product):  
- by weight
- by volume


100
2


50
1
 
 
Mixing ratio (coloured product):  
- by weight


100


45
  
 
Working time/Flow life
 at 20°C  5 kg
 
 
15 min

(*) Taking into account the nature of the product, we can guarantee neither the perfect compliance with RAL colours nor the reproduction of shades.

(**) Above-mentioned specific gravity and viscosity are given for clear epoxy coating. Specific gravity and viscosity of blended products may slightly vary depending upon colour. 
 


Mechanical properties after 7 days cure at 20°C for self-smoothing mortars

Hardness
 
 Shore D
77
 
Traction
 Tensile strength
 Elongation @ break
 Young’s modulus
41.0±0.6 MPa
10.7±1.6%
1800 ± 110 MPa
 
Compression
 Compressive strength
 Compression %
 Young’s modulus
63.7±0.9 MPa
4.2±0.2%
2140 ± 50 MPa
 
Flexion
 Bend stress
 Flexural stress @ break
 Bending deflection @ break
 Flexural modulus Eb
52.7 ± 1.2 MPa
60.3 ± 0.9 MPa
11.0 ± 0.2 mm
2090 ± 15 MPa
 

Mechanical properties after 7 days cure at 20°C for repair mortars

 
1:7 mixed mortar
1:10 mixed mortar
 Tensile strength
25.4 MPa
22.7 MPa
 Compressive strength
59 MPa
74 MPa

 
Chemical resistance at 20°C
 
 Hydrochloric acid 10% & 30%
R
 Demineralised water
R
 Sulphuric acid  10%
R
 Distilled water
R
 Sulphuric acid  30%
R
 Bleach (48° chl)
R
 Acetic acid 10%
RI
 Water
R
 Nitric acid 10%
R
 Seawater
R
 Nitric acid 30%
NR
 Hydrogen peroxide
R
 Lactic acid 10%
R
 Ethanol
R
 Chromic acid 10%
R
 Domestic fuel
R
 Chromic acid 20%
RI
 Grease-Soap
R
 Citric acid 10%
R
 Oils
R
 Phosphoric acid 10%
RI
 Aliphatic hydrocrabons
R
 Phosphoric acid 30%
NR
 Aromatic hydrocarbons
NR
 Ammonia 10%
R
 Concentrated sodium     hyposulphite 10%
R
 Ammonia 20%
RI
 Brake liquid
NR
 Ethyl Acetate
NR
 Methanol
NR
 Acetone
NR
 Methyl ethyl ketone
NR
 Alcohol 50%
R
 Soda 50%
R
 Concentrated sodium bisulphite 10%
R
 Petrol - Super 98
RI
 Detergent solution
R
 Toluene
NR
 Urine
R
 Wines, beers, fruit juices
R


R :   Resistant
RI:   Resistant to intermittent exposure/occasional spillages if immediately cleaned
NR:  Non resistant

NB: Depending on the initial colour and the nature of the chemical agent, a discolouration or change in colour can sometimes be observed, this change does not affect in any way the protection properties of the flooring.

Safety:

IMPORTANT: before embarking on any work involving EPONAL 326 the separate Product Safety Data Sheet must be studied carefully by those carrying out the work. PREVENT skin and eye contact. Do not breathe vapours. Use protective gloves when mixing or using. Wear protective clothes and safety glasses.

Shelf life:

Up to 24 months in the original, unopened containers, stored in a dry place at +10°C and +25°C

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Application

Application conditions
Working temperature: + 10° to + 25°C
Maximum relative humidity: 80% 
During application and cure, substrate temperature must always be at least 3°C above the dew point temperature.
 
PREPARATION
Preparation should be in accordance with building standards. Subfloors must be clean, sound, dry (relative humidity <4%), of adequate compressive and tensile strength (at least 25 MPa and 1,5 MPa respectively after 28 days cure for new concrete) and  not subject to hydrostatic pressure. They must be free from laitance, cracks and structural defects; clean and free from dust, grease, curing compounds, sealers or any other contaminants that would inhibit proper bond. Depending on subfloor condition and type, subfloors are treated by grit blasting, mechanical planing, scabbing, sandblasting, high pressure water washing or chemical stripping. After mechanical treatment of a subfloor, thoroughly vacuum all dust.
 
Steel and metal decking should be sanded or abrasive blasted to a white metal finish, then degreased with MEK (Methyl Ethyl Ketone). Prime metal surface with EPONAL 990 at a rate of 80-100gsm, after curing sand and degrease it with MEK just before over-coating.

PRODUCT MIXING
EPONAL 326 MORTAR
Slowly add the hardener into resin (parts A + B) while mixing, mix thoroughly for 2 to 3 minutes with an electric drill and mixing paddle (speed: not more than 300 rpm in order to avoid air bubbles inclusion) until the colour is homogeneous. Then add the required sand quantity depending on chosen mortar type.
 
SYSTEMS

- SYSTEM 1
Self-smoothing mortar

Primer:  Dry substrate: apply a coat of EPONAL 321 using a roller or or a notched trowel  n°3 B2 at a rate of 300-400gsm. Damp substrate (not subject to water seepage or likely to suffer from rising damp): apply one or two coats EPONAL 376 using a roller or or a notched trowel  n°3 B2 at a rate of 300-400gsm/coat

Self-smoothing mortar:   on a dry substrate using a float, squeegee or rake apply immediately the mixture of  EPONAL 326 made from resin/hardener blend (part A+B) +  type F208/1  sharp sand (particle size 0.1-0.9mm). Mixing ratio by weight: EPONAL 326 = 1 i.e. 2 kg/m² and sand = 2 i.e. 4 kg/m² for 3mm thcik flooring and EPONAL 326 = 1 i.e. 2.5 kg/m² and sand = 3 i.e. 7.5 kg/m²  for 5mm thcik flooring. Use a spiked roller to help aeration and to avoid bubbles inclusion.  

IMPORTANT: Long exposure to sunlight/UV rays may cause variations in colour. This effect is more or less noticeable depending on initial colour. It does not affect in any way mechanical properties of the flooring.
 
- SYSTEM 2
Float or trowel applied repair mortar

Primer:  Dry substrate: apply a coat of EPONAL 321 using a roller or or a notched trowel  n°3 B2 at a rate of 300-400gsm. Damp substrate (not subject to water seepage or likely to suffer later from rising damp): apply one or two coats EPONAL 376 using a roller or or a notched trowel  n°3 B2 at a rate of 300-400gsm/coat.

Float or trowel-applied repair mortar: onto still slightly wet primer (after 1 hour cure at +20°C) apply a mortar made from 1 part  (by weight) of   EPONAL 326 blend (Resin+Hardener), add progressively 7 parts (by weight) of shard sand (particle size: 0.12-1.5mm) or 10 parts (by weight) of mixed sand made of 2/3 of sharp sand (particle size: 0.12-1.5mm) and 1/3 of sharp sand  (particle size: 0.5-1.6mm).
 
 
Temperatures
+10°C
+20°C
+25°C
Cure time between a coat of EPONAL 321 or 376 or 990 and EPONAL 326
48 hours
24 hours
12 hours
Set to foot traffic after:
4 days
48 hours
24 hours

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Packaging

Presentation Bar code Bostik code
metal drum - clear resin - 200 kg 3549210009078 165320
metal drum - clear hardener - 200 kg 3549210009092 165341
metal kit - colourless - 23.1 kg 165855
metal kit - white colour - 25 kg 176063
metal kit - beige colour 1014 - 25 kg 3549210009771 176083
metal kit- blue colour 5012 - 25 kg 3549210009740 176075
metal kit - red-brown colour - 25 kg 3549210009788 176085
metal kit - chamois - 25 kg 176087
metal kit - grey colour 7037 - 25 kg 3549210009764 176081
metal kit - grey colour 7040 - 25 kg 3549210009757 176077
metal kit - yellow colour 1018 - 25 kg 176073
metal kit - green colour 6002 - 25 kg 176071
metal kit - green colour 6021 - 25 kg 3549210009733 176067
metal kit - black colour - 25 kg 176065

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