Sikafloor®-290 Primer
Solvent-free, two part primer based on epoxy resin.
- Easy and fast to apply
- Especially suitable for highly absorbent substrates
- 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
- Sikafloor®-291
Advantages
- Easy and fast to apply
- Especially suitable for highly absorbent substrates
- Odourless
- Can be applied in unventilated areas
- Very good bond strength over its whole application temperature range
- Environmentally friendly
Packaging
Pre-batched 28 kg units.
Part A: 8.00 kg container
Part B: 20.0 kg container
Colour
Part A - resin: white liquid
Part B - hardener: yellowish liquid
Mixed colour: light yellow
Product Details
Shelf Life
Part A, part B: 12 months from date of production
Part C: 9 months from date of production
Storage Conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +35 °C.
Density
Part A: ~ 1.10 kg/l (at +27°C)
Part B: ~ 1.04kg/l (at +27°C)
Mixed resin: ~ 1.05 kg/l (at +27°C)
Solid Content
~ 28% (by weight)
Tensile Adhesion Strength
| > 1.5 N/mm2 | (According to ISO 4624) |
Application
Mixing Ratio
Part A : Part B = 1 : 2.5 (by weight)
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
≤ 4% moisture content.
Test method: Sika® Tramex moisture meter, CM measurement or Oven-dry method. No rising moisture according to ASTM (PE sheet test).
Pot Life
5.6 kg mass
| Temperature | Time (at 75% r.h.) |
| +30°C | ~ 45 minutes |
Caution:
The end of the product’s potlife is not noticeable! Keep within the limitations mentioned below. Discard material not used within these times.
Waiting Time / Overcoating
Before applying Sikafloor®-291 on Sikafloor®-290 Primer allow:
| Substrate temperature | Waiting time (Minimum) | Waiting time (Maximum) |
| +10°C | 12 hours | 72 hours |
| +20°C | 6 hours | 48 hours |
| +30°C | 4 hours | 24 hours |
Times are approximate at 75% r.h. and will be affected by changing ambient and substrate conditions, particularly temperature and relative humidity.
Applied Product Ready for Use
| Substrate temperature | Foot traffic |
| +10°C | ~ 12 hours |
| +20°C | ~ 6 hours |
| +30°C | ~ 4 hours |
No specific additional curing measures are required.
All times are approximate and will be affected by changing ambient and substrate
conditions
Consumption
0.20 – 0.40 kg/m2/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.
EQUIPMENT
Low speed electric stirrer (~ 300 – 400 rpm) with helical paddle or other suitable equipment.
MIXING
Prior to mixing, shake part A and part B briefly until homogenous, then pour both parts into the mixing container and mix thoroughly for 3 minutes until a uniform mix has been achieved.
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.
APPLICATION
Apply Sikafloor®-290 Primer by suitable brush, roller or trowel and overwork with a roller.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be removed mechanically.