Sikadur®-41 CF Slow
Sikadur®-41 CF Slow is a thixotropic, 3-component patching and repair mortar, based on a combination of epoxy resins and special fillers, designed for use at higher temperatures between +25 °C and +45 °C. Suitable for use in hot and tropical climatic conditions.
- Easy to mix and apply
- Very good adhesion to most construction materials
- High strength mortar
- Thixotropic: non-sag in vertical and overhead applications
- Hardens without shrinkage
- Different coloured components (for mixing control)
- No primer needed
- High initial and ultimate mechanical strength
- Good abrasion resistance
- Good chemical resistance
Usage
Sikadur®-41 CF Slow may only be used by experienced professionals. As a repair and bonding mortar for:- Concrete elements
- Hard natural stone
- Ceramics, fiber cement
- Mortar, bricks, masonry
- Steel, iron, aluminium
- Wood
- Polyester, epoxy
- Glass
- Filling of cavities and voids
- Vertical and overhead use
- Corners and edges
- Joint filling and crack sealing
- Joint and crack arris / edge repair
Advantages
Sikadur®-41 CF Slow has the following advantages:- Easy to mix and apply
- Very good adhesion to most construction materials
- High strength mortar
- Thixotropic: non-sag in vertical and overhead applications
- Hardens without shrinkage
- Different coloured components (for mixing control)
- No primer needed
- High initial and ultimate mechanical strength
- Good abrasion resistance
- Good chemical resistance
Packaging
11 kg (A + B + C)Colour
Component A: grey
Component B: black
Component C: sand
Components A + B + C mixed: concrete grey
Product Details
APPROVALS / CERTIFICATES
Mortar for structural and non-structural repair, tested according to EN 1504-3.
Composition
Epoxy resin
Shelf life
24 months from date of production
Storage conditions
Store in original, unopened, sealed and undamaged packaging in dry conditions at temperatures between +5 °C and +30 °C. Protect from direct sunlight.
Density
| ~2.01 kg/l (component A + B + C mixed) (+21 °C) |
Compressive Strength
| Curing time | Curing temperature | |
| +35 °C | +45 °C | |
| 1 d | ~67 N/mm2 | ~68 N/mm2 |
| 3 d | ~75 N/mm2 | ~77 N/mm2 |
| 7 d | ~76 N/mm2 | ~79 N/mm2 |
Modulus of Elasticity in Compression
| ~5 000 N/mm2 (14 d, +35 °C) | (ASTM D 695-95) |
Tensile Strength in Flexure
| Curing time | Curing temperature | |
| +35 °C | +45 °C | |
| 1 d | ~20 N/mm2 | ~22 N/mm2 |
| 3 d | ~25 N/mm2 | ~26 N/mm2 |
| 7 d | ~28 N/mm2 | ~28 N/mm2 |
Tensile Strength
| Curing time | Curing temperature | |
| +35 °C | +45 °C | |
| 1 d | ~11N/mm2 | ~11 N/mm2 |
| 3 d | ~12 N/mm2 | ~14 N/mm2 |
| 7 d | ~14 N/mm2 | ~16 N/mm2 |
Tensile Adhesion Strength
| Curing time | Substrate | Curing temperature | Adhesion strength |
| 7 d | Concrete dry | +35 °C | > 4 N/mm2 * |
| 7 d | Concrete moist | +25 °C | > 4 N/mm2 * |
| 7 d | Steel | +25 °C | 11 N/mm2 |
| 7 d | Steel | +35 °C | 12 N/mm2 |
| 7 d | Steel | +50 °C | 10 N/mm2 |
*100 % concrete failure
Shrinkage
Hardens without shrinkage.
Coefficient of Thermal Expansion
| 4.8 × 10−5 per °C (Temp. range +23 °C − +60 °C) | (EN 1770) |
Heat Deflection Temperature
| Curing time | Curing temperature | HDT |
| 7 d | +35 °C | +50 °C |
(thickness 10 mm)
Application
Mixing Ratio
Component A : B : C = 2 : 1 : 2.5 by weight.
Component A : B : C = 2 : 1 : 3.4 by volume.
Layer Thickness
60 millimetre maximum.
When using multiple units, use one after the other. Do not mix the following unit until the previous one has been used in order to avoid a reduction in handling time.
Sag Flow
| On vertical surfaces it is non-sag up to 20 millimeter thickness. | (EN 1799) |
Product Temperature
Sikadur®-41 CF Slow must be applied at temperatures between +25 °C and +45 °C.
Ambient Air Temperature
+25 °C min. / +45 °C max.
Dew Point
Beware of condensation.
Substrate temperature during application must be at least 3 °C above dew point.
Substrate Temperature
+25 °C min. / +45 °C max.
Substrate Moisture Content
Substrate must be dry or mat damp (no standing water)
Brush the adhesive well into the substrate
Pot Life
| Temperature | Potlife* | Open time |
| +25 °C | ~120 min | -- |
| +35 °C | ~90 min | -- |
| +45 °C | ~45 min | ~45 min |
*200 g
The potlife begins when the resin and hardener are mixed. It is shorter at high temperatures and longer at low temperatures. The greater the quantity mixed, the shorter the potlife. To obtain longer workability at high temperatures, the mixed adhesive may be divided into portions. Another method is to chill components A, B and C before mixing them (not below +5 °C).
Consumption
The consumption of Sikadur®-41 CF Slow is approximately 2.0 kg/m2 per mm of thickness.
SUBSTRATE QUALITY
Mortar and concrete must be older than 28 days (depends on minimal requirement of strengths).
Verify the substrate strength (concrete, masonry, natural stone).
The substrate surface (all types) must be clean, dry or mat damp (no standing water) and free from contaminants such as dirt, oil, grease, existing surface treatments and coatings etc.
Steel substrates must be de-rusted similar to Sa 2.5.
The substrate must be sound and all loose particles must be removed.
SUBSTRATE PREPARATION
Concrete, mortar, stone, bricks: substrates must be sound, dry or mat damp (no standing water), clean and free from laitance, ice, grease, oils, old surface treatments or coatings and all loose or friable particles must be removed to achieve a laitance and contaminant free, open textured surface.
Steel: must be cleaned and prepared thoroughly to an acceptable quality that is by blast-cleaning and vacuum. Avoid dew point conditions.
MIXING
Pre-batched units:
Mix components A and B together for at least 3 minutes with a mixing spindle attached to a slow speed electric drill (maximum 300 rpm) until the material becomes smooth in consistency and a uniform grey colour. Then add component C and continue until mixture is homogeneous. Avoid aeration while mixing. Then, pour the whole mix into a clean container and stir again for approximately 1 more minute at low speed to keep air entrapment at a minimum. Mix only that quantity which can be used within its pot life.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with Sika® Colma Cleaner immediately after use. Hardened / cured material can only be mechanically removed.