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Key technical facts
- Coverage
- Consumption varies depending on the weight of the carbon fiber and the condition of the substrate. In general: 0,6 – 1 kg/m².
- Mixing Ratio (by weight)
- Component A / Component B: 75 / 25
- Pot Life (+23 °C)
- ~240 minutes
- Full Cure Time (+20 °C)
- 7 days
- Density (A+B mixture, +23 °C)
- 1,10 ± 0,1 kg/l
- Color
- Component A: Liquid, colorless Component B: Slightly yellowish liquid A + B mixture: Liquid, colorless
Last updated:
This page has been translated from the product's original information. Please refer to the technical data sheet for binding technical values.
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Description
Demco® 900 is a two-component, solvent-free, high-strength, epoxy-based impregnation resin.
Advantages
- Easy to mix and easy to apply with a trowel and saturation roller.
- Intended for manual impregnation (wet-out).
- Offers high mechanical properties.
- No separate primer is required underneath.
- High fiber saturation capability and high adhesion.
- Provides good adhesion to many substrates.
- Extra-long pot life.
Application Areas
- Demco® 900 is suitable for professional users only.
- Suitable for use in hot and tropical climates.
- Used as a surface primer for the wet lay-up method.
Technical Properties
| Chemical Base | Epoxy resin |
| Number of Components | 2 |
| Color | Component A: Liquid, colorless Component B: Slightly yellowish liquid A + B mixture: Liquid, colorless |
| Mixing Ratio (by weight) | Component A / Component B: 75 / 25 |
| Density (A+B mixture, +23 °C) | 1,10 ± 0,1 kg/l |
| Viscosity (+25 °C) | ~600 mPas |
| Pot Life (+23 °C) (EN ISO 9514) | ~240 minutes |
| Open Time (TS EN 12189) | ~90 min |
| Full Cure Time (+20 °C) | 7 days |
| Surface Temperature | +15 °C min. / +40 °C max. |
| Ambient Temperature (during application) | 15 °C – 40 °C |
Mechanical Properties
| Compressive Strength* (TS EN 12190, TS EN 196-1) | ~44 N/mm² |
| Flexural Strength* (TS EN 196-1) | ~16 N/mm² |
| Adhesion to Concrete* (TS EN 1542) | ≥ 3,8 N/mm² (concrete failure) |
| Bond Strength to Steel* (TS EN 12188) | ~2,75 N/mm² |
| Modulus of Elasticity in Compression* (TS EN 13412) | ~12000 N/mm² |
| Coefficient of Thermal Expansion (TS EN 1770) | 3,66 x 10⁻⁵ /°C |
| Glass Transition Temperature (TS EN 12614) | ≥ 40 °C |
* After 7 days at +23 °C.
Surface Preparation and Application
Surface Quality: The concrete surface must be sound and of sufficient strength. The concrete substrate must be clean and have adequate compressive and tensile strength.
Surface Preparation: The surface of the structural element to be treated must be cleaned of residues such as plaster, paint, oil and rust, as well as weak cement laitance and weak particles, and any necessary repairs must be carried out to obtain an even surface.
Mixing:
- Briefly mix component A using a mixing paddle attached to a low-speed electric mixer (max. 300 rpm).
- The entire B component should be poured into the A component, and A+B should be mixed for 4 minutes with a low-speed mixer (approx. 300 rpm) and a suitable mixing paddle until a homogeneous mixture is obtained, taking care that no unmixed material remains on the sides and bottom of the container.
- Avoid over-mixing to minimize air entrainment.
- Mix only as much material as can be used within the pot life.
- When bulk material is used, the exact mixing ratio must be maintained by accurately weighing and dosing each component.
Application Conditions
- The ambient temperature during application should be within 15 °C – 40 °C.
- DEMCO® 900 is supplied in ready-to-use sets. Do not add solvents or similar thinners to the mixture during application.
- Care should be taken to prepare only as much material as can be used within the working time.
- Mixing must always be carried out using suitable mechanical mixers. Do not mix by hand.
- For special cases not covered in the data sheet (different application areas, weather conditions, etc.), consult the technical team of Demmerg Kimya Sanayi ve Ticaret A.Ş.
Coverage
Consumption varies depending on the weight of the carbon fiber and the condition of the substrate. In general: 0,6 – 1 kg/m².
Storage and Shelf Life
Store the products in their unopened original packaging in a ventilated, cool and dry place, away from moisture, frost, fire and direct sunlight. Do not stack pallets during long-term storage.
Store in original, unopened and undamaged packaging in a dry place at between +10 °C and +30 °C. Protect from direct sunlight.
Suitable for use for 12 months from the date of manufacture.
Packaging
- Total net: 5 kg (A: 3,75 kg / B: 1,25 kg)
- Total net: 10 kg (A: 7,5 kg / B: 2,5 kg)
- Total net: 20 kg (A: 15 kg / B: 5 kg)
Approvals / Standards
Tested as a structural adhesive in accordance with EN 1504-4.
