Sikafloor®-155 WN
Sikafloor®-155 WN is a solvent-free, water dispersed primer based on epoxy resin.
- Easy and fast to apply
- Especially suitable for highly absorbent substrates
- Water dispersed and odourless
- Can be applied in unventilated areas
- Very good bond strength over its whole application temperature range
- Environmentally friendly
Usage
As a primer and adhesion promoter on properly prepared:- New concrete
- Cementitious screeds
- Hardened concrete
- Existing epoxy floor coatings
- EpoCem levelling layers
- Sikafloor®-81 EpoCem®
- Sikafloor®-20 PurCem® and Sikafloor®-21 PurCem® if required.
Advantages
- Easy and fast to apply
- Especially suitable for highly absorbent substrates
- Water dispersed and odourless
- Can be applied in unventilated areas
- Very good bond strength over its whole application temperature range
- Environmentally friendly
Packaging
| Part A | 7.5 kg containers |
| Part B | 2.5 kg containers |
| Part A+B | 10 kg ready to mix units |
Colour
Resin - part A | thick coloured paste |
Hardener - part B | light yellow translucent emulsion |
| Mixed Resin | Oxide red (~ RAL 3009) |
Product Details
APPROVALS / STANDARDS
Two part water dispersed epoxy resin primer according to EN 13813:2002, DoP 02 08 11 01 001 0 000002 1053.
Chemical Base
Water dispersed epoxy
Shelf Life
12 months from date of production
Storage Conditions
The product must be stored properly in original, unopened and undamaged sealed packaging, in dry conditions at temperatures between +5°C and +30°C.
Density
| Part A | ~ 1.6 kg /l |
Part B | ~ 1.1 kg /l |
| Mixed resin | ~ 1.4 kg /l |
All density values at 23°C.
Solid content by weight
~ 70 %
Solid content by volume
~ 56 %
Viscosity
4900 mPa.s (+20°C) | Contraves (RM 180 Rheomat) |
Tensile Adhesion Strength
| >1.5 N/mm2 (failure in concrete),28 days at +23°C / 50% r.h. | (EN 13892-8) |
Application
Mixing Ratio
Part A : B = 3 : 1 by weight
Layer Thickness
D.F.T.: ~ 110 - 180 µm per coat
Ambient Air Temperature
+10°C min. / +35°C max.
Relative Air Humidity
85% r.h. max.
Dew Point
Beware of condensation!
The substrate and uncured floor must be at least 3ºC above dew point to reduce the risk of condensation or blooming on the surface of the applied product.
Substrate Temperature
+10°C min. / +35°C max.
Substrate Moisture Content
Test method: Sika®-Tramex meter, CM - measurement or Oven-dry-method. Always confirm substrate moisture content prior to the application of the primer:
- < 4% for impervious resin finishes.No rising moisture according to ASTM D 4263 test (Polyethylene sheet).
- Can be applied on matt - damp green concrete when overcoating with the Sikafloor® EpoCem® range.
Pot Life
Temperature | Time |
+10°C | ~ 180 minutes |
+20°C | ~ 90 minutes |
| +30°C | ~ 45 minutes |
Caution: expiry of potlife without visible change. (Above values at 75% r.h.)
Curing Time
Before applying Sikafloor®-81 onto Sikafloor®-155 WN allow:
| Substrate temperature | Min.waiting time | Max.waiting time |
| +10°C | 12 hours | 72 hours |
| +20°C | 6 hours | 48 hours |
| +30°C | 4 hours | 24 hours |
At low temperatures and / or high humidity curing time will increase.
Apply subsequent coats only to tack free primer.
Applied Product Ready for Use
Substrate temperature | Foot traffic |
+10°C | ~ 12 hours |
| +20°C | ~ 12 hours |
+30°C | ~ 12 hours |
Consumption
0.3 - 0.5 kg/m2 / coat. (2 - 3.3 m2 / kg / coat).
Sikafloor®-155 WN, diluted with water 10% by weight for the first coat.
Undiluted for the second coat.
This figure is theoretical and does not include for any additional material required due to surface porosity, surface profile, variation in level or wastage, etc.
MIXING
Prior to mixing, thoroughly stir part A (resin) well, then add all of part B (hardener) and mix both liquid parts thoroughly for one minute until a uniform mix has been achieved.
When parts A and B have been mixed for one minute for the first coat, slowly add 10% of clean water while mixing continues for a further two minutes, until a fully homogenous mix has been achieved.
For the second coat, do not add additional water, but continue the mixing for a total of 3 minutes until a fully homogenous mix has been achieved.
To ensure thorough mixing of both coats, after the minimum 3 minutes mixing, pour the mixed material into another container carefully scraping the sides and mixing paddle with a spatula and then mix again briefly to ensure complete and thorough mixing.
Excessive mixing must also be avoided to minimise air entrainment.
Mixing Tools
Low speed electric stirrer(~ 300 - 400 rpm)
APPLICATION
Apply Sikafloor®-155 WN by suitable brush, roller or trowel and overwork with a roller.
Caution:
The end of the product’s potlife is not noticeable! Keep within the limitations mentioned below. Discard material not used within these times.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be removed mechanically.