Fexsil FEXPRIME
At a glance
- Silicone primer
- 1-component
- Proven professional quality
Fast delivery throughout Europe
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FEXPRIME (formerly SiliPainter One) is a one-component primer and adhesion promoter that makes silicone joints paintable. The primer forms a thin, stable bonding layer between the silicone sealant and a suitable paint system. This allows paint to adhere properly to a surface that is normally difficult to paint.
FEXPRIME is suitable for both new silicone joints and the renovation of existing joints and can be used indoors and outdoors.
Benefits of FEXPRIME
- Makes silicone joints paintable.
- Ensures good adhesion of the paint to the sealant.
- Remains flexible to help prevent cracking in the paint layer.
- Prevents unwanted colour changes in the coating.
- Solvent-free and low-odour.
- Suitable for indoor and outdoor use.
- High yield of approximately 100 linear metres per container.
Applications
Use FEXPRIME to prepare silicone joints that you want to paint afterwards. It is suitable, for example, for silicone joints around windows and doors or joints that need to be refinished during renovation work.
The primer can be used on both new and existing silicone joints. The final paint system must be suitable for this application and comply with DIN 52460 and DIN 52452-4. Paintability must be demonstrated in accordance with DIN 52452-4 A3.
How to use FEXPRIME
- Make sure the silicone joint is dry and free from dust, grease and release agents. Do not use soap or washing-up liquid.
- Stir FEXPRIME thoroughly before use. Then apply a thin layer of approximately 20-30 µm using a suitable brush or PUR sponge. Apply a second coat if necessary.
- FEXPRIME can be painted over after approximately 20 to 60 minutes. The exact time depends on the ambient temperature.
- Paint over the treated silicone joint while the primer is still fresh.
- After approximately 1 hour, the primer is water-resistant. Full curing and mechanical resistance are achieved after approximately 21 days.
Apply FEXPRIME at temperatures between +5 °C and +30 °C and avoid application in high heat or direct sunlight. Use the entire contents after opening.
Properties
Contents: 125 ml
Colour: white
Consistency: liquid
Coverage: approx. 100 linear metres
Layer thickness: approx. 20-30 µm
Paintable: after approx. 20-60 minutes (at 21°C)
Water-resistant: after approx. 1 hour
Fully cured: after 21 days
Area of application: indoors and outdoors
Application temperature: +5 °C to +30 °C
Shelf life: 12 months
Solvent-free: yes
Storage: dry, cool and frost-free
Product properties
The key technical properties clearly listed in one place.
- Article number
- LAK001668
-
The technical product category, such as primer, resin, hardener or cleaner. It explains the product's purpose and helps you find other products with a similar function.
- Primer
-
The recommended layer thickness is the thickness at which you apply each coat of paint, coating or resin. It is usually given in micrometres (µm) or millimetres (mm).
- Wet film thickness: the thickness immediately after application.
- Dry film thickness: the thickness after drying or curing.
For a coating with 60% solids by volume, a wet film of 100 µm will theoretically produce a dry film of approximately 60 µm. Film thickness affects coverage, protection and drying. Always check whether the manufacturer specifies wet or dry film thickness.
- Approximately 20-30 µm
-
The recommended application temperature range indicates the conditions under which the product can generally be applied and cured properly. Three temperatures matter:
- Air: the temperature in the workshop or outdoors.
- Substrate: the temperature of the surface being treated.
- Product: the temperature of the resin, adhesive or coating itself.
A cold substrate can cause condensation and affect adhesion. At higher temperatures, two-component products may react faster, reducing their working time. Check the dew point and follow the product instructions.
- 5-30 °C
-
The period for which an unopened product remains usable under the specified storage conditions. Check whether the period starts from the manufacturing date or another date. Shelf life may be shorter after opening, especially for products sensitive to air or moisture.
- 12 months
-
A solvent-free product contains no added solvents according to the manufacturer's specification. This does not automatically mean it is odourless, emission-free or safe to use without protective measures.
- Yes
-
The overcoating interval tells you when the next layer of paint, varnish or coating may be applied. Many multi-coat systems specify both a minimum and a maximum interval:
- Minimum overcoating time: the previous layer is dry or cured enough to accept another coat.
- Maximum overcoating time: the period during which the next coat can bond without extra surface preparation under the stated conditions.
Overcoating too early can affect drying or the finish. Once the maximum interval has passed, cleaning and sanding may be needed to ensure adhesion between coats. Temperature and film thickness affect the waiting times.
- Approximately 20-60 minutes (21 °C)
-
Curing time is the period a product needs to reach a specified stage of cure. It is usually given in hours or days, often at a reference temperature such as 20 °C. A product may be tack-free or safe to handle before reaching its full mechanical and chemical resistance. Film thickness and mixed quantity may also affect the time.
- Approximately 21 days
-
Consumption or coverage describes how much product is needed for a given surface area. Consumption may be stated in g/m² or kg/m², while coverage is often given in m²/L or m²/kg. A consumption of 0.2 kg/m² means a theoretical 200 grams per square metre. Actual use depends on film thickness, substrate absorbency, application method and waste.
- approx. 100 linear metres
- Net contents
- 125 ml
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