Sikadur-Combiflex® CF Adhesive Normal
2-part epoxy adhesive for the Sikadur-Combiflex® SG System
Sikadur-Combiflex® CF Adhesive Normal is a 2-part epoxy based thixotropic adhesive for bonding the Sikadur-Combiflex® SG modified flexible Polyolefin (FPO) waterproofing tapes to different substrates. Internal and external use. Application temperature range +10 °C to +30 °C. It is part of the Sikadur-Combiflex® SG System.
- Easy to mix and apply
- Excellent adhesion to many materials
- Performs well within a wide temperature range
- Good resistance to many chemicals
- No primer needed
- High mechanical resistance
Usage
- Adhesive for the Sikadur-Combiflex® SG System
Advantages
- Easy to mix and apply
- Excellent adhesion to many materials
- Performs well within a wide temperature range
- Good resistance to many chemicals
- No primer needed
- High mechanical resistance
Packaging
| 6 kg (A+B) pre-batched unit | Pallets of 432 kg (72 × 6 kg) |
| 15 kg bulk container 10 kg Part A + 5 kg Part B | Part A, pallets of 390 kg (39 × 10 kg) |
| 30 kg bulk container 20 kg Part A + 10 kg Part B | Part A, pallets of 780 kg (39 × 20 kg) |
Refer to current price list for packaging variations.
Colour
| Resin-Part A | White |
| Hardener-Part B | Dark grey |
| Part A+B mixed | Light grey |
Product Details
ENVIRONMENTAL INFORMATION
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Conformity with LEED v4 MRc 2 (Option 1): Building Product Disclosure and Optimization – Environmental Product Declarations
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Conformity with LEED v4 MRc 4 (Option 2): Building Product Disclosure and Optimization - Material Ingredients
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IBU Environmental Product Declaration (EPD)
APPROVALS / STANDARDS
- CE Marking and Declaration of Performance to EN 1504-4 - Structural bonding
- Methane gas transmission rate, ISO 15105-1, Versaperm, Report No. LR2282
Product Declaration
EN 1504-4 - Structural bonding
Chemical Base
Epoxy resin and selected fillers
Shelf Life
24 months from date of production
Storage Conditions
The product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between +5 °C and +30 °C.
Always refer to packaging.
Density
| Part A | ~1,7 kg/l |
| Part B | ~1,7 kg/l |
| Mixed resin | ~1,5 kg/l |
All Density values at +23 °C.
System Structure
Refer to Sikadur-Combiflex® SG System data sheet or contact Sika Technical Services for specific information.
Compressive Strength
| Curing time | Curing temperature | ||
| +10 °C | +23 °C | +30 °C | |
| 3 days | ~35 N/mm2 | ~48 N/mm2 | ~52 N/mm2 |
| 7 days | ~41 N/mm2 | ~50 N/mm2 | ~54 N/mm2 |
| 14 days | ~43 N/mm2 | ~54 N/mm2 | ~55 N/mm2 |
Modulus of Elasticity in Compression
| at +5 °C | ~4200 N/mm2 |
| at +23 °C | ~3500 N/mm2 |
Tensile adhesion strength
| Substrate | Adhesion strength |
| Concrete dry | > 4 N/mm2 * |
| Concrete (mat damp) | > 4 N/mm2 * |
| Steel (blast cleaned) | > 10 N/mm2 |
*failure in concrete
Coefficient of Thermal Expansion
| 5,3 × 10−5 (± 0,2 × 10–5) 1/K (linear expansion between -20 °C and +40 °C) | (EN ISO 1770) |
Service Temperature
-30 °C min. / +38 °C max.
Chemical Resistance
Refer to Sikadur-Combiflex® SG System system data sheet or contact Sika Technical Services for specific information.
Application
Mixing Ratio
Part A:B = 2:1 parts by weight or volume
Product Temperature
+10 °C min. / +30 °C max.
Ambient Air Temperature
+10 °C min. / +30 °C max.
Dew Point
Beware of condensation.
Steel substrate temperature during application must be at least +3 °C above dew point.
Substrate Temperature
+10 °C min. / +30 °C max.
Substrate Moisture Content
Cementitious substrates:
Substrate must be dry or matt damp (no standing water).
Brush the adhesive well into the substrate if matt damp.
Pot Life
| Temperature | Pot life | Open time |
| +10 °C | ~125 minutes | – |
| +23 °C | ~50 minutes | ~70 minutes |
| +30 °C | ~25 minutes | – |
If larger quantities are being mixed the temperature of Sikadur-Combiflex® CF Adhesive Normal will increase due to the chemical reaction, resulting in a reduced pot life.
Waiting Time / Overcoating
Sikadur-Combiflex® CF Adhesive Normal may be overcoated with an epoxy coating. If this is required, do not smooth the adhesive with detergent. If waiting time between application of adhesive and overcoating is to be longer than 2 days, the adhesive must be blinded to excess with quartz sand immediately after application.
Consumption
Refer to Sikadur-Combiflex® SG System method statement. Depends on type of tape or strip.
SUBSTRATE QUALITY
Concrete/masonry/mortar/stone
Note: Concrete and mortar must be at least 3–6 weeks old.
Substrate surfaces must be sound, clean, dry or matt damp. Free from standing water, ice, dirt, oil, grease, coatings, laitance, efflorescence, old surface treatments, all loose particles and any other surface contaminants that could affect adhesion of the adhesive.
Steel
Surfaces must be clean, dry, free from oil, grease, coatings, rust, scale, all loose particles and any other surface contaminants that could affect adhesion of the adhesive.
SUBSTRATE PREPARATION
Concrete/masonry/mortar/stone
Substrates must be prepared mechanically using suitable abrasive blast cleaning, needle gunning, light scabbling, bush hammering, grinding or other suitable equipment to achieve an open textured gripping surface profile.
Steel
Surfaces must be prepared mechanically using suitable abrasive blast cleaning, grinding, rotating wire brush or other suitable equipment to achieve a bright metal finish with a surface profile similar to aluminium oxide paper medium grade. Avoid dew point conditions before and during application.
All substrates
All dust and loose material must be completely removed from all substrate surfaces before application of the product by vacuum / dust removal equipment.
MIXING
IMPORTANT
Avoid over mixing to minimise air entrainment.
Note:Use a spiral paddle in an electric single or double paddle mixer (Bulk container) at a maximum speed of 300 rpm.
Pre-batched unit
- Mix Part A (resin) for ~60 seconds.
- Add Part B (hardener) to Part A (resin).
- Mix Parts A+B continuously for ~3 minutes until a uniformly smooth, coloured mix is achieved.
- To ensure thorough mixing, pour materials into another clean container and mix again to achieve a smooth and uniform mix.
Bulk container
Note:For large volume mixing a suitable pan mixer can be used.
Note:Mix only the quantity which can be used within its pot life.
Add both parts in the correct proportion into a suitable clean, dry container and mix in the same way as for the pre-batched unit.
CLEANING OF TOOLS
Clean all tools and application equipment with Sika® Colma-Cleaner immediately after use. Hardened or cured material can only be removed mechanically.