Sikafloor®-381
2-part self smoothing epoxy coating with high chemical and mechanical resistance
Sikafloor®-381 is a two part, self-smoothing, epoxy coating, highly chemically and mechnically resistant.
- High chemical resistance
- High mechanical resistance
- Liquid proof
- Abrasion resistant
- Slip resistant surface possible
Usage
Chemically and mechanically highly resistant coating for concrete and screed surfaces in bund areas for protection against water contaminating liquidsAdvantages
- High chemical resistance
- High mechanical resistance
- Liquid proof
- Abrasion resistant
- Slip resistant surface possible
Packaging
| Part A | 21,25 kg containers |
| Part B | 3,75 kg containers |
| Part A+B | 25 kg ready to mix units |
Colour
Resin - part A | coloured, liquid |
| Hardener - part B | transparent, liquid |
Almost unlimited choice of colour shades.
Under direct sun radiation there may be some discolouration and colour deviation, this has no influence on the function and performance of the coating.
Product Details
ENVIRONMENTAL INFORMATION
- Conformity with LEED v4 MRc 2 (Option 1): Building Product Disclosure and Optimization – Environmental Product Declarations
APPROVALS / STANDARDS
- Cleanroom Suitability Sikafloor®, Fraunhofer IPA, Report No. SI 1008-533
- Fire Classification EN 13501-1, Sikafloor®-381, MPA Dresden Germany, Test report No. 2013-B-2119/07
- CE Marking and Declaration of Performance to EN 13813 - Resin screed material for internal use in buildings
- CE Marking and Declaration of Performance to EN 1504-2 - Surface protection product for concrete - Coating
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Chemical Base
Epoxy
Shelf Life
24 months from date of production.
Storage Conditions
The packaging 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 | ~1,77 kg/l |
| Part B | ~1,04 kg/l |
| Mixed resin | ~1,6 kg/l |
All Density values at +23 °C
Solid content by weight
~100 %
Solid content by volume
~100 %
Shore D Hardness
~82 (7 days / +23 °C) | (DIN 53 505) |
Abrasion Resistance
| 62 mg (CS 10/1000/1000) (7 days / +23°C) | (EN ISO 5470-1 Taber Abraser Test) |
Compressive Strength
| > 80 N/mm2 (14 days / +23 °C) | (EN 13892-2) |
Tensile Strength in Flexure
> 55 N/mm2 (14 days / +23 °C) | (EN 13892-2) |
Tensile Adhesion Strength
> 1.5 N/mm² (failure in concrete) | (ISO 4624) |
Chemical Resistance
Resistant to many chemicals. Contact Sika technical service for specific information.
Thermal Resistance
| Exposure* | Dry heat |
| Permanent | +50 °C |
| Short-term max. 7 d | +80 °C |
| Short-term max. 12 h | +100 °C |
Short-term moist/wet heat* up to +80 °C where exposure is only occasional (i.e. during steam cleaning etc.)
*No simultaneous chemical and mechanical exposure.
Application
Mixing Ratio
Part A : part B = 85 : 15 (by weight)
Ambient Air Temperature
+10 °C min. / +30 °C max.
Relative Air Humidity
80 % r.h. max.
Dew Point
Beware of condensation!
The substrate and uncured floor must be at least 3 °C above dew point to reduce the risk of condensation or blooming on the floor finish.
Note: Low temperatures and high humidity conditions increase the probability of blooming.
Substrate Temperature
+10 °C min. / +30 °C max.
Substrate Moisture Content
< 4 % pbw moisture content.
Test method: Sika®-Tramex meter, CM-measurement or Oven-dry-method.
No rising moisture according to ASTM (Polyethylene-sheet).
Pot Life
| Temperature | Time |
| +10 °C | ~60 minutes |
| +20 °C | ~30 minutes |
| +30 °C | ~15 minutes |
Curing Time
Before applying Sikafloor®-381 on Sikafloor®-381 allow:
Substrate temperature | Minimum | Maximum |
+10 °C | 24 hours | 3 days |
+20 °C | 18 hours | 2 days |
| +30 °C | 6 hours | 1 days |
Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
Consumption
| Coating System | Product | Consumption |
| Primer | Sikafloor®-156 | 0.3 - 0.5 kg/m² |
| Levelling (optional) | Sikafloor®-156 | Refer to PDS of Sikafloor®-156 |
| Wearing course horizontal areas (1.8 ~2.8 mm) | Sikafloor®-381 filled with quartz sand 0.1 - 0.3 | 1.8 kg/m²/mm 10 - 15°C: without filling |
| Wearing course vertical areas (Film thickness ~ 1.5 mm) | Sikafloor®-381 + 2.5 - 4 wt.-% Extender T | 2 x 1.25 kg/m² |
| Broadcast system with slip resistance (Film thickness ~ 2.5 mm) | Sikafloor®-381 , broadcast to excess with silicon carbide 0.4 - .0.7 mm | 1.6 kg/m² Binder without filling Silicon Carbide 0.5 - 1.0 mm |
| Seal coat (on broadcast areas only) | Sikafloor®-381 + 5 wt.-% Thinner C | 0.75 - 0.85 kg/m² |
MIXING
Prior to mixing, stir part A mechanically. When all of part B has been added to part A, mix continuously for 3 minutes until a uniform mix has been achieved. When parts A and B have been mixed, add the quartz sand and if required the Extender T and mix for a further 2 minutes until a uniform mix has been achieved. To ensure thorough mixing pour materials into another container and mix again to achieve a consistent mix. Over mixing must be avoided to minimise air entrainment.
Mixing Tools
Sikafloor®-381 must be thoroughly mixed using a low speed electric stirrer (300–400 rpm) or other suitable equipment. For the preparation of mortars use a forced action mixer of rotating pan, paddle or trough type. Free fall mixers should not be used.
APPLICATION
Prior to application, confirm substrate moisture content, relative humidity and dew point.
If > 4 % pbw moisture content, Sikafloor® EpoCem® should be applied as a temporary moisture barrier (T.M.B.) system.
Wearing course (horizontal areas):
Sikafloor®-381 is poured, spread evenly by means of a serrated trowel.
Roll immediately in two directions with a spiked roller to ensure even thickness.
Wearing course (vertical areas):
The first layer of Sikafloor®-381, mixed with 2,5–4 % Extender T, has to be applied by trowel. After curing, apply the second layer of Sikafloor®-381, mixed with 2,5–4 % Extender T, by trowel.
Wearing course with slip resistance:
Sikafloor®-381 is poured, spread evenly by means of a serrated trowel and blind the fresh layer with silicon carbide or quartz sand to excess. After final drying the surplus silicon carbide / quartz sand must be swept off and the surface must be vacuumed. The seal coat (Sikafloor®-381 +5 % by weight Thinner C) has to be applied evenly by short-piled roller or squeegee.
CLEANING OF TOOLS
Clean all tools and application equipment with Thinner C immediately after use. Hardened and/or cured material can only be removed mechanically.