Sikadur-Combiflex® CF Adhesive Normal
Sikadur-Combiflex® CF Adhesive Normal is a 2-part epoxy based thixotropic adhesive for bonding the modified flexible Polyolefin (FPO) waterproofing tapes covered by the Sikadur Combiflex® SG System to different substrates. Internal and external use. Temperature range +10 °C to +30 °C.
- 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
| Part A | 20 kg containers |
| Part B | 10 kg containers |
Pallets of 600 kg: (20 × 20 kg Part A) + (20 × 10 kg Part B)
Colour
| Resin-Part A | White |
| Hardener-Part B | Dark grey |
| Part A+B mixed | Light grey |
Product Details
APPROVALS / STANDARDS
- CE Marking and Declaration of Performance to 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 sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.
Density
| Part A | ~1,5 kg/l |
| Part B | ~1,5 kg/l |
| Mixed resin | ~1,5 kg/l |
All Density values at +23 °C.
Product Declaration
EN 1504-4 - Structural bonding
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
| ~ 4200 N/mm2 (+5 °C) | (ASTM D 695) |
| ~ 3500 N/mm2 (+23 °C) |
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) |
Chemical Resistance
Refer to Sikadur Combiflex® SG System system data sheet or contact Sika Technical Services for specific information.
Service Temperature
–30 °C min. / +38 °C max.
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 | Potlife* | 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 potlife.
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 data sheet. Depends on type of tape or strip.
SUBSTRATE QUALITY
Concrete/masonry/mortar/stone
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
Pre-batched units
Prior to mixing all parts, mix part A (resin) briefly using a mixing spindle attached to a slow speed electric drill (max. 300 rpm). Add part B (hardener) to part A and mix Part A+B continuously for at least 3 minutes until a uniformly coloured smooth consistency mix has been achieved. To ensure thorough mixing pour materials into a clean container and mix again for approximately 1 minute. Over mixing must be avoided to minimise air entrainment. Mix full units only. Mixing time for A+B = 4,0 minutes. Mix only the quantity which can be used within its pot life.
Bulk packaging, not pre-batched
Mix each Part separately before mixing together. Add the Parts in the correct proportions into a suitable mixing pail and stir correctly using an electric low speed mixer as above for pre-batched units. For large volume mixing a suitable pan mixer can be used.
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.