To choose a sander that is perfectly suited to your needs, several criteria must be taken into account to ensure maximum efficiency and ease of use. Here are the essential elements to consider when making your selection:

Type of sander

• Belt sander: This model is particularly suitable for sanding large flat surfaces, such as wooden floors or tables. It is ideal for roughing work, where a large amount of material needs to be removed quickly before moving on to finer finishes. Thanks to its large abrasive belt, it can cover a large area in a short time.
• Edge sander: This is specifically designed to reach difficult areas, such as the edges of walls or around skirting boards, or generally in spaces that your sander cannot reach. It produces a high-quality finish, especially in confined spaces where other sanders would be less manoeuvrable. It is therefore recommended for finishing and for working in corners and other nooks and crannies.
• Single disc sander: Although this machine may look like a conventional sander, it is in fact designed only for polishing or very light sanding. With its relatively low power, it is not suitable for roughing work or surfaces requiring intensive sanding. It is an excellent choice for finishing on many types of surfaces and materials, but it should not be used for more demanding tasks. It excels at finishing work, but cannot compete with more powerful sanders for larger projects.
• Multi-disc sander: A veritable Swiss army knife thanks to its multiple discs and pads, this sander is specially designed for complex surfaces. Its multi-disc system ensures even abrasion, guaranteeing a uniform, high-quality result, even over large surfaces. It can even help you with colouring and the application of preparation layers. It is particularly recommended for environments where a flawless finish is essential.

Important Features

• Power: The power of the sander is a decisive criterion, especially for roughing work. The more powerful the machine, the more effectively it will be able to handle hard or thick materials. High power will allow you to work faster and achieve quality results.
• Suction system: The suction system is a key element in keeping your work environment clean. A good suction system reduces the amount of dust generated during sanding, which is essential for the health of users and for the cleanliness of the space. In addition, it prevents dust from settling on the surfaces being worked on, which could affect the quality of the finish.
• Ergonomics: A well-balanced and lightweight sander is essential for prolonged work sessions without too much fatigue. Be sure to choose a model that is comfortable to hold and allows you to work safely. An ergonomic design minimises stress on the wrists and arms, reducing the risk of injury from prolonged use.
• Repairability: Make sure that the machine you choose has a good repairability rate. In the event of a breakdown or wear and tear, being able to get it repaired quickly and cheaply can make all the difference. A quality after-sales service, ideally located, means you can benefit from fast assistance and accessible spare parts.

Additional Tips

• Type of work: Clearly identify the types of work you do most frequently. This will enable you to choose a sander that will specifically meet your needs, without investing in unnecessary features.
• Try before you buy: try the machine before you buy it. This will allow you to test its manoeuvrability, comfort of use and performance, ensuring that it meets your expectations.
• Availability of spare parts: Check that spare parts and consumables (such as abrasive belts) are readily available, to avoid any inconvenience when you need to maintain or repair the machine.
• Brand choice: Opt for reputable brands that are synonymous with quality and durability. Choose a brand that offers locally designed machines and good after-sales service.

By taking these criteria into account, you will be able to choose a sander that is perfectly suited to your specific needs, offering optimal performance and a flawless end result for all your sanding jobs.

Advantages of multi-disc sanders: we tell you all about them!

Multi-disc sanders offer several important advantages:

• - Versatility: They can be used for various sanding operations, from roughing to finishing, on different types of surfaces such as parquet, concrete, stone or resins. The choice of numerous discs is a big plus.
• Efficiency: The rotation of multiple satellites enables mark-free sanding and a three-fold increase in speed.
• Manoeuvrability: Their ergonomic design facilitates handling and reduces user fatigue, particularly when there are level differences.
• Power: Equipped with powerful motors, they can effectively handle various materials.

Repex Floor offers a complete range of professional sanders to meet all your surface sanding and renovation needs.

All our sanders are made in France with a constant focus on quality and durability. They are designed to be repairable, thus guaranteeing a long service life. If you are a demanding professional, Repex has the right solution for all your sanding jobs.

The belt sander is an essential tool for floor treatment professionals, offering numerous technical advantages:

Efficiency and speed

• Enables large flat surfaces to be sanded quickly and efficiently
• Its high cutting speed (up to 25 m/s) is ideal for intensive applications.
• Considerably accelerates the material removal process.

Power and versatility

• Excellent for stripping paint, varnish and other old finishes.
• Capable of effectively treating various materials such as wood, metal or resins.
• Ideal for roughing, levelling and preparing surfaces before finishing.

Abrasive flexibility

• Compatible with abrasive belts or rolls, allowing you to work for longer without interruption.
• This versatility offers greater autonomy and reduces downtime on large construction sites.

Precision and control

• Offers precise adjustment of the abrasive thanks to a hand lever and an adjustment screw.
• Allows for a consistent and uniform surface finish.
• Its offset drum ensures optimal approach to baseboards.

Robustness and durability

• Designed for intensive and large-scale work.
• Solid construction with an aluminium alloy frame for increased longevity.

At Repex, our floor belt sanders are made in France, combining power, precision and durability to meet the highest demands of floor renovation professionals.

The edger is an essential tool for parquet flooring professionals. Its main advantage lies in its ability to produce precise finishes in hard-to-reach areas such as edges, corners and ledges. It saves considerable time compared to traditional methods and allows for optimised use of abrasive, which translates into savings for craftsmen.

The versatility of the edge sander is a major asset. It excels in various meticulous jobs such as sanding stairs, along skirting boards, inside cupboards and under radiators. Its ergonomic design, with two-handed grip, promotes optimal guidance and precise control during use.

The long disc holder is a particularly advantageous feature of professional edgers. It allows you to reach areas that are extremely difficult to access, especially under radiators, in narrow corners and along baseboards. This increased flexibility offers a significant advantage over commercially available portable power edgers.

In terms of time savings, professional edgers far outperform consumer-grade electric models. Equipped with more powerful motors and a larger sanding diameter, they can cover a larger area in less time. Their superior sanding power translates into faster and more efficient work, especially on large areas or hardwood floors requiring extensive renovation.

In short, the use of a professional edger with a long disc holder is a wise investment for anyone looking to optimise their working time and the quality of their finishes in the field of parquet sanding.

For your parquet sanding project, here are the recommendations concerning the abrasives to be used, taking into account the type of abrasive and the grain:

Types of abrasives

Aluminium oxide (corundum)

Versatile and suitable for most parquet floors, it offers good value for money for hardwoods and classic parquet floors.

Silicon carbide

Particularly effective for removing thick varnish and working on hard surfaces. It is often used for the first sanding passes.

Zirconium

With a long service life, it is ideal for demanding work on large surfaces. Its higher cost is offset by its durability.

Ceramic

This highly resistant abrasive offers excellent performance on hardwoods and heavily worn parquet flooring. It is particularly suitable for professional use.

Grits to use

Coarse grit (16 to 40)

Used for the first stage of sanding, it removes old finishes (varnish, wax) and corrects significant irregularities in the parquet flooring.

Medium grain (50 to 80)

This stage is used to smooth out the marks left by the initial sanding and to prepare the parquet for the finishing stages.

Fine grain (100 to 150)

This produces a smooth surface, ready to receive the finishing touches. It is a crucial stage for a professional result.

Very fine grain (180 to 240)

Used for finishing work, just before applying varnish or oil. It ensures a perfectly smooth surface.

For best results, always start with a coarse grain and progress to a finer grain. Adapt the choice of grain and type of abrasive according to the initial condition of your parquet and the desired level of finish.

Here is a table showing the disc sizes for each sander and pad:

Sander / Pad Disc size

4D and 5D sander Ø 150 mm

Original edger Ø 150 mm

Heavy edger (BLO) Ø 185 mm

Other machines Ø 200 mm

Special pads Ø 406 mm

Further details:

• Discs Ø 150 mm: Compatible with 4D and 5D sanders and Original edgers. These discs are versatile and suitable for various jobs, from roughing to finishing.
• Discs Ø 185 mm: Used with the heavy BLO edger, ideal for work on more demanding surfaces.
• Discs Ø 200 mm: Designed for other machines, suitable for jobs requiring a larger sanding surface.
• Discs Ø 406 mm: For special plates for specific applications, such as polishing or buffing.

These dimensions cover a wide range of applications, meeting various sanding and finishing needs.

To install the abrasive on a standard belt sander drum, follow these steps:

1. Unplug the machine and lift up the protective drum guard.
2. Loosen the clamping screws on the drum's sandpaper holder.
3. Insert one end of the abrasive strip into the drum holder.
4. Wrap the strip around the drum by turning it.
5. Insert the other end of the strip into the holder.
6. Centre the strip on the drum and smooth out any creases.
7. Tighten the screws on the sandpaper holder.
8. Check that the belt protrudes approximately 1.5 mm from the drum.
9. Adjust if necessary by repeating the procedure.
10. Close the drum guard.

It is essential to ensure that the belt is properly tensioned and centred on the drum. Incorrect installation can result in damage to the machine or floor. The belt should centre itself automatically when started.

Proper belt tension and centring are crucial for efficient and safe sanding. An improperly installed belt may tear during use, which could damage the equipment or the treated surface.

There is no precise standard measurement for the surface area that a sanding belt can cover, as this depends on many factors:

Factors influencing the surface area covered

1. Belt dimensions: Sizes vary according to the sanding machine model.
2. Material being sanded: The hardness of the wood or floor influences the wear of the belt.
3. Sanding technique: The method and the pressure applied affect the lifespan of the belt.
4. Grain of the belt: Larger grains generally wear out more quickly.
5. Quality of the belt: Higher quality belts such as those from Primex often last longer.

Approximate estimate

On average, an abrasive belt can cover between 3 and 6 m² before needing to be replaced. However, this estimate can vary considerably depending on the specific conditions of the work and the experience of the user.

It is important to note that this estimate is very general and may not accurately reflect all scenarios. For a specific project, it is recommended that you consult the sander manufacturer or a sanding professional to obtain a more precise estimate based on your particular situation.

The yield of glazes varies depending on the product and its application, but here is a general estimate:

Average yield of glazes:

• Per coat: Between 8 and 12 m² per litre.
• For two coats (without a hard base): Approximately 4 to 6 m² per litre.
• For three coats (on raw wood): Approximately 3 to 4 m² per litre.

Factors influencing yield:

1. Type of sealer:
   • Water-based or polyurethane sealers generally offer a yield of 10 m²/litre per coat.
   • Some specific products, such as two-component sealers, may cover slightly less due to their viscosity.
2. Condition of the substrate:
   • Raw or very porous wood will consume more product.
   • Applying a hard primer beforehand reduces the quantity needed for subsequent coats.
3. Number of coats:
   • Two coats are often sufficient on a wooden floor that has been prepared beforehand with a hard primer.
   • Three coats are recommended for optimal protection on raw wood.

Practical examples:

• With a 1 litre pot, you can cover approximately:
  • 10 m² with a single coat.
  • 4 to 5 m² with two coats.
• A 2.5 litre pot will cover approximately:
  • 25 m² with a single coat.
  • 10 to 12.5 m² with two coats.

Tips for optimising use:

• Apply a hard primer before sealing to reduce consumption.
• Use a microfibre roller or synthetic bristle spalter for even application.
• Allow for drying time between coats and sand lightly between coats for a better finish.

In short, the yield depends on the product chosen, the surface and the conditions of application. Always check the manufacturer's specific recommendations to ensure optimal results.

How many coats of sealant should be applied after sanding a wooden floor?

The number of coats depends on the sealant used (solvent-based or water-based) and the hard primer applied beforehand. It is essential to consult the technical data sheet and the manufacturer's recommendations for each product.

As a guide:

• 3 coats are the standard solution to ensure good protection for your floor.
• 2 coats may be sufficient if a suitable undercoat (hard primer) has been applied beforehand.
• In damp rooms or areas subject to heavy use (entrance hall, corridor, kitchen, etc.), 4 coats are recommended for optimum durability.

Practical tips:

• Allow the drying time between each coat (usually 3 to 4 hours).
• Lightly sand between coats to improve adhesion and finish.
• Remember to dust thoroughly after each step.

The choice between varnish, oil or wax for a wooden floor depends on several factors. Here are the conditions in which each finish is recommended:

Varnish

Recommended in the following cases:

• Areas with heavy traffic (public places, shops)
• Need for maximum protection against stains and wear and tear
• Desire for minimal maintenance
• Looking for a glossy or satin finish
• Spaces requiring increased resistance to moisture

Varnish is ideal for parquet flooring subject to significant stress, as it forms a durable and waterproof protective layer.

Oil

Recommended when:

• You want to preserve the natural appearance of the wood
• Partial renovation is planned
• You are looking for the authentic feel of wood
• Aesthetics take precedence over extreme resistance
• Regular but easy maintenance is preferred.

Oil is particularly suitable for noble woods such as oak or exotic species, as it enhances their natural beauty.

Wax

To be favoured in the following situations:

• Looking for a traditional and warm appearance
• Old or characterful parquet floors
• Low-traffic areas
• Possibility of frequent maintenance
• Desire for a satin or gloss finish

Wax is ideal for classic or rustic interiors and for people who are willing to maintain their parquet regularly.

In short, varnish is ideal for maximum protection and minimum maintenance, oil for a natural look and easy renovation, and wax for a traditional and warm finish. The final choice will depend on the use of the place, the desired aesthetic and the level of maintenance that you are willing to give to the parquet.

The shelf life of a sealant after opening is generally between 12 and 24 months, provided certain precautions are taken.

To maximise its shelf life:

1. Store the sealant in a cool, dry place away from direct light. Avoid extreme temperatures that could alter its composition.
2. Make sure the container is tightly closed after each use to avoid contact with air, which can cause the product to harden or degrade.
3. Before reusing an opened glass cleaner, check its condition. If the product has lumps, an altered texture or an unusual odour, it is best not to use it.
4. Note that water-based sealants generally have a shorter shelf life than solvent-based ones.

By following these recommendations, you can extend the life of your sealant while ensuring its effectiveness in future applications. It is important to always check the condition of the product before using it, even if it has not exceeded the recommended shelf life.

Roller or spalter for applying finishing products?

The choice between a roller and a spalter for applying finishing products depends not only on the characteristics of the surfaces to be treated, but also on the habits and preferences of each craftsman. Here is an overview of the advantages of each method:

Roller

• Ideal for large surfaces: Perfect for applying products quickly and evenly over large flat areas such as parquet flooring.
• Efficiency: Allows for quick application, which is particularly useful during intensive work.
• Recommended for various products: Suitable for floor sealers, varnishes, oils and paints.
• Uniform finish: Offers excellent glide and reduces the risk of a mottled finish.
• Variable width: Available in different widths, up to 500 mm, for considerable time savings.

Spalter brush

• Precision: Ideal for applying varnish, sealants, oils and wood stains, especially on delicate finishes.
• Increased control: Allows for greater precision, especially for borders and details.
• Decorative techniques: Particularly effective for decorative painting techniques and textural effects.
• Adaptable width: Available in different widths to adapt to the size of the surface to be treated.

Recommendations

• For large surfaces: favour the roller for its speed and uniformity.
• For precise finishing and hard-to-reach areas: opt for the spalter.
• For optimal results, combine the two: use the roller for the main surface and the spalter for the edges and finishing touches.

At Repex, we understand that every craftsman has their own habits and preferences. That's why we offer a full range of professional rollers and spalters, designed to meet all your floor finishing needs. Our tools are manufactured to deliver high-quality results, whether you're working on wood, concrete or other surfaces.

1. MS260 solid parquet adhesive:
   • For parquet: 700-1500 g/m²
   • For cork: 400-450 g/m²
2. MS262 solid parquet adhesive:
   • Standard application: 450-500 ml/m²
   • Application in strips: 600-800 ml/m²
   • With notched trowel for parquet: 500-950 ml/m²
3. WAKOL MS 230 (elastic adhesive): 700-1000 g/m² depending on the type of parquet
4. WAKOL PU 280 primer:
   • First coat (primer): 100-150 g/m²
   • Second coat (moisture barrier): 250-350 g/m²

These consumption figures may vary depending on the type of substrate, the covering to be glued and the application method. It is advisable to consult the specific technical data sheets for each product in order to obtain the most accurate information for the intended application.

Solutions for removing glue from a wooden floor:

1. Acetone: Apply acetone to the traces of glue with a soft cloth and rub gently. Acetone is effective at dissolving residues without damaging the wood, but make sure you work in a well-ventilated room.
2. White vinegar: Mix white vinegar with a little warm water, soak a cloth and rub gently. This method is ideal for light glues and is also kind to the wood.
3. Ice: Cool the glue with ice cubes to make it brittle, then scrape it off gently with a plastic spatula.
4. Specific solvent: For more resistant glues, use a solvent suitable for wood. Test it on a small area before applying it to the whole surface.

Solutions for removing glue from a concrete floor:

1. Manual scraper: Use a long-handled scraper to remove dry or light residues. This method is simple but can be laborious for large surfaces.
2. Boiling water: If the glue is water-based, pour boiling water over it to soften it, then scrape it off before it cools.
3. Chemical stripper: Apply a specific stripper for glue or sealant to the concrete. Leave it to act according to the manufacturer's instructions, then scrape off the softened residue.
4. Power tool: For very stubborn adhesives or large surfaces, use a sander equipped with an abrasive disc or an oscillating tool.

Adhesive under the carpet: The efficiency of the glue plates of the Repex 4D sander

For effective removal of glue from under a carpet, the glue plates of the Repex 4D sander are a revolutionary solution. These specially designed plates allow glue residues, even the toughest, to be removed quickly and effortlessly from surfaces such as concrete or wood. Their advanced technology guarantees uniform stripping while preserving the integrity of the underlying substrate. Users report impressive results, transforming an often tedious task into a quick and efficient process. Whether you are a professional or a DIYer, this tool represents a real breakthrough in the field of stripping.

General precautions:

• Wear protective gloves and goggles.
• Work in a well-ventilated area.
• Always test products or tools on a small area before treating the whole surface.

With these solutions adapted to each type of situation, you will be able to remove the glue effectively while preserving your surfaces!

An anti-humidity primer such as Wakol PU 280 is used for several important reasons in the preparation of floors prior to the installation of floor coverings:

Protection against excessive humidity

• Blocks residual moisture in concrete screeds up to:
  • 6% CM / 98% RH for screeds without underfloor heating
  • 3% CM / 85% RH for screeds with underfloor heating
• Protects moisture-sensitive floor coverings from potential damage

Improved adhesion

• Acts as a primer on absorbent and non-absorbent substrates
• Strengthens weakened screed surfaces

Conditions of use

• Substrate temperature ≥ 15°C
• Concrete screed at least 28 days old
• Surface dry, with no visible water
• Intact structural waterproof membrane under the slab

Advantages

• Single-component, ready to use
• Fast drying (40-50 minutes)
• Solvent-free and very low emissions
• Compatible with underfloor heating
• Can be used in basements and in areas with high humidity

Wakol PU 280 is particularly recommended for installing wooden floors in high-humidity environments such as basements, offering reliable protection against potential moisture-related problems such as mould, warping and deformation of the wood.