CREFIX GREEN
CREFIX Green: Accelerated screed quality - Efficient & versatile
Efficiency and adherence to deadlines are essential in modern screed construction. Long drying phases can severely disrupt construction processes and cause costs. With CREFIX Green, the universal drying accelerator and screed hardener from Crefix, you can fundamentally optimize your processes. Achieve significantly earlier readiness for covering, benefit from excellent workability and sustainably improve the quality of your screeds.
What is CREFIX Green?
CREFIX Green is an innovative, aqueous, polymer-based universal product specially developed for earth-moist cement screeds. It is a high-performance partner that combines the functionality of an effective drying accelerator, an optimizing heating screed additive and a high-quality screed topping in a single, user-friendly solution. CREFIX Green is your key to accelerated construction times and superior screed performance:
- Highly effective drying accelerator: drastically reduces the waiting time until heated screeds are ready for covering (e.g. to 7-10 days), enables construction work to continue more quickly and optimizes your project schedules.
- High-performance heating screed additive: Improves the compactability and complete coating of the heating pipes, resulting in more efficient heat transfer and optimized heating performance.
- Effective screed coating: Significantly increases the flexural and adhesive tensile strengths (>1.5 N/mm²), enables earlier coatability and can help to reduce screed thicknesses.
- Superior workability: Ensures easy stripping and smoothing of the screed with a working time of at least 45 minutes, without introducing additional air into the mixture.
This establishes CREFIX Green as the ideal solution for screed layers who are looking for maximum efficiency, accelerated construction processes and uncompromising quality in their screed work, especially for projects with tight deadlines.
CREFIX Green: Rely on green efficiency and top screed performance
Green light for rapid construction progress and optimized schedules
With CREFIX Green, you can significantly speed up your screed projects and save valuable time on the construction site:
- Significantly faster readiness for covering: Achieve the necessary residual moisture for laying top coverings on heated screeds considerably earlier. Depending on the application and dosage, screeds can be ready for covering after 7-10, 14-18 or 21-28 days.
- Faster usability of the screed: The screed can be walked on, loaded and released for subsequent trades such as painters or drywallers earlier, which leads to a smoother construction process.
- Efficient heat transfer for heating screeds: As an optimized heating screed additive, CREFIX Green ensures improved compaction and a complete coating of the heating pipes, which maximizes heat transfer.
Robust quality, simple processing - screed construction rethought
CREFIX Green not only impresses with its speed, but also with a significant improvement in material properties and ease of processing:
- Increased screed strength: The special tempering formula increases the flexural and adhesive tensile strengths of your screed. Reliably achieve adhesive tensile values of over 1.5 N/mm², ideal for demanding coatings.
- Potential for optimized screed thicknesses: Thanks to the increased strength, thinner structures can be realized with floating screeds under certain circumstances, which saves material and reduces the construction height.
- Excellent workability: Enjoy a working time of at least 45 minutes. CREFIX Green makes the screed smooth, facilitates stripping and smoothing and does not introduce any unwanted additional air.
- Reduced shrinkage behavior: The formulation supports low-shrinkage and low-stress hardening of the screed, minimizing the risk of cracking and cupping.
A green thread for your screed projects - versatile and safe
Its broad applicability and harmless composition make CREFIX Green a responsible choice for modern construction projects:
- Universal all-rounder: Whether as a drying accelerator, heating screed additive or screed topping - CREFIX Green is the solution for a wide variety of earth-moist cement screeds.
- Building biologically harmless & safe: Like all Crefix accelerators, CREFIX Green is free from formaldehyde, solvents or other volatile substances of concern.
- Optimized water balance: Promotes a low and effective water-cement ratio, which has a positive effect on the density, strength and durability of the screed.
Technical data & processing instructions for CREFIX Green
Product features at a glance
- Chemical base: Aqueous polymer solution with smoothing, processing and drying aids
- Delivery form: 25 kg canister
- Appearance / Color: Green
- Density: approx. 1.03 kg/liter
- Shelf life: 12 months from production date (store frost-free, protect from direct sunlight)
- Storage conditions: In sealed, undamaged original containers. Homogenize before use/daily!
Important notes on the use of CREFIX Green
- Homogenize: Shake/homogenize CREFIX Green well before use or at least daily!
- Temperatures: Ambient and processing temperature between +5°C and +30°C. If heating starts early, do not allow the screed temperature to fall below +15°C (if necessary, set the flow temperature to +18-20°C).
- No foreign additives: Do not combine with other additives.
- Concrete formulation/application (dosage):
- Recommended: 2 bags of cement (50 kg) per 200 liters of screed mixture.
- As heating screed additive (improvement of compactability/pipe coating): min. 0.25 kg Crefix per mixture.
- For tempering (increased strength): 0.5 kg Crefix per mixture (1.5% on cement).
- Gradations of readiness for covering (see table in the data sheet and specific heating protocols).
- Mixing & processing: Dose Crefix onto the moist sand/cement mixture with the mixing water (premix in the bucket). The amount of mixing water required is reduced by 3-6 liters. Mix for at least 90 seconds before adjusting the consistency, total mixing time 2 min.
- Cement quality & aggregate: CEM I or CEM II A (or grades approved by Crefix). Aggregate according to EN 13139 (grading curve A/B 0-8mm for screed concrete, 0-4mm for screed mortar).
- Start heating early (protocol!): Initial heating according to specific heating protocol (see downloads). Ventilate without draughts (3-4 times a day for 20-30 minutes). Avoid overdrying the surface. CM measurement after heating up.
- Conformity to standards & CM measurement: CM measurement according to guidelines (BEB data sheet 8.1). Average sample 50g over the entire cross-section. No sieving/separation of aggregate.
Downloads & templates for CREFIX Green
Product description CREFIX Green
All the details on application, dosing and the many benefits of CREFIX Green drying accelerator & screed coating.
📄View product description(PDF)
CREFIX dosing confirmation
Form for documenting the application and correct dosing of Crefix products on your construction site.
📋View dosing confirmation(PDF)
CREFIX Green heating protocols
Important protocols for the correct functional heating and heating of screeds accelerated with CREFIX Green:
- ♨️Heat-up protocol 7 days(PDF)
- ♨️Heat-up protocol 14 days(PDF)
- ♨️Heating protocol 21 days(PDF)
- ♨️Heating protocol 28 days(PDF)
CM measurement protocol CREFIX Green
Template for professional documentation of the CM measurement for screeds treated with CREFIX Green.
Frequently asked questions (FAQ) about Crefix Green
CREFIX Green is a universal product for earth-moist cement screeds. It is used as a drying accelerator (especially for heated screeds for earlier readiness for covering), as a heated screed additive (to improve compactability and heat transfer) and as a screed coating (to increase flexural and adhesive tensile strength and for early coatability).
Depending on the dosage and the specific construction site conditions, the readiness for covering of heated screeds with CREFIX Green can be significantly shortened. Possible time windows are e.g. 7-10 days, 14-18 days or 21-28 days, for which there are also specific heating protocols. Detailed information can be found in the technical data sheet.
As a heating screed additive, CREFIX Green improves the compactability of the screed and the sheathing of the heating pipes. This leads to optimized heat transfer and can increase the efficiency of the heating system.
CREFIX Green increases the flexural and adhesive tensile strength of the screed (adhesive tensile strength >1.5 N/mm² depending on the dosage). This enables an earlier load-bearing capacity and coatability of the screed and may allow a reduction of the screed thickness in floating constructions.
No, on the contrary. CREFIX Green offers excellent workability with simplified stripping and smoothing of the screed. The working time is at least 45 minutes and, unlike many other additives, it does not introduce any additional air into the screed.
Yes, CREFIX Green is very well suited for use with silo screed, as it combines the diverse requirements for acceleration, tempering and processing in one product.
The dosage depends on the desired application. To improve the compactability of heated screeds, for example, at least 0.25 kg/mixture is recommended, to achieve increased strength 0.5 kg/mixture (1.5% on cement). There are precise dosage recommendations in the technical data sheet and the heating protocols for specific readiness times for covering. Generally, 2 bags of cement (50 kg) per 200 liters of screed mixture are recommended.
Yes, CREFIX Green is harmless to building biology. It contains no formaldehyde, solvents or other volatile, questionable compounds.
CREFIX Green is dosed onto the moist, pre-mixed sand-cement mixture together with the mixing water (premix in the bucket). The mixing time before the final consistency setting should be 90 seconds, the total mixing time after adding all components 2 minutes.
Initial heating must always be carried out according to the specific heating protocol (7, 14, 21 or 28 days), which you can find in the download area. A CM measurement is mandatory after heating has been completed and should be documented in accordance with our CM measurement protocol.
CREFIX Green: The efficient solution for fast and high-quality screeds
With CREFIX Green, you are opting for a proven technology for accelerating and tempering your cement screeds. This versatile universal product enables you to achieve faster construction times, improved screed strengths and optimum workability, which leads to more economical and qualitatively superior results.
Rely on the performance of CREFIX Green to shorten the time it takes for your heated screed to be ready for covering, increase its load-bearing capacity and at the same time benefit from easy application. CREFIX Green is your partner for adherence to deadlines and the highest quality standards in screed construction, without compromising on building biology.
Our experienced Crefix team will be happy to provide you with comprehensive advice on the possible applications of CREFIX Green and support you in optimizing your screed projects.
Give your projects the green light for success! Contact us for detailed advice on CREFIX Green or your personal quote.