Den Braven Concrete Repair - Beton Fix

Code: 945
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€9,57 / pcs €7,91 excl. VAT €9,57 / 1 pcs
Stock (>5 pcs)
Delivery to:
2.06.2026
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Category: FOR TILERS >> Others
Den Braven Concrete Repair - Beton Fix 280 ml – Two-component polyester resin for structural crack stitching

Professional ultra-fast repair system based on styrene-free two-component polyester resin. Engineered for structural monolithic welding of cracks, fissures, and fractured edge repairs in concrete substrates, cement screeds, and anhydrite. Creates a permanent bond with higher strength than the concrete itself, sandable and ready for waterproofing within 20 minutes.

⏱️ Lightning-fast cure – sandable in 20 minutes
📐 Zero shrinkage – monolithic weld with no sinking
🎁 Verified by J&J Tile Design – job site proven

Detailed information

Product detailed description

📊 Technical Parameters

Chemical base: Polyester resin (styrene-free)
Color after mixing: Grey (concrete tone)
Cartridge volume: 280 ml (standard anchoring gun format)
Thermal resistance: -40 °C to +80 °C (suitable for exterior and underfloor heating)
Working time: approx. 3–5 minutes (at 20 °C)
Full load / sanding: after 20–30 minutes
Warranty: 2 years
Product code: DB-BETONFIX-280

💡 Why choose this exact solution?

As professional tilers, we know that installing large-format tiles or applying a luxury wall finish over a cracked or crumbling concrete floor is a guaranteed ticket to a disaster – the tile will inevitably crack or de-bond right where the subfloor shifts. Den Braven Beton Fix is a heavy-duty anchoring and rapid-repair compound utilizing a styrene-free two-component polyester system. Unlike standard cement stěrky and patch products from regular hardware stores, it features absolute zero shrinkage during cure, forms a perfect moisture barrier, easily withstands freezing temperatures, and delivers multiple times the tensile strength of the concrete itself. The compound mixes perfectly automatically inside the included static mixing nozzle, completely eliminating tedious hand-weighing of resin and hardener in cups.

Tested in J&J Tile Design: We deploy this system during subfloor prep on any project where screed cracks are present. It is the only safe method for structural expansion stitching before applying liquid waterproofing membranes on balconies, terraces, and inside modern bathrooms.

🛠️ Professional TIP for installation: Want to fix a crack so it never moves again? Cut across the crack with an angle grinder perpendicular to its direction (roughly every 20–25 cm) to a depth of about 15–20 mm. Thoroughly vacuum all dust out of the crack and the crosscuts using an industrial vacuum. Insert metal stitching staples into the perpendicular slots, then fill and level everything flush using Beton Fix. The staples mechanically lock the shear forces of the subfloor while the resin takes care of the monolithic weld.
🔍 Expert perspective: Keep in mind that Beton Fix cures via an exothermic chemical reaction – it generates heat while setting and hardens incredibly fast. During summer months when temperatures exceed 25 °C, the open working time drops below 3 minutes. Make sure your substrate is fully cut out, cleaned, and vacuumed BEFORE you start. Once you begin extruding the resin from the cartridge, you must work continuously. For pulling the excess material clean and flat along the floor plane, our **KW Stěrka Jolly EDGE** works beautifully. If you have leftover resin in the tube, leave the used nozzle attached – it acts as a perfect air-tight seal. For your next job, just screw on a fresh mixing nozzle and carry on.

🔧 Compatibility and System Integration

This rapid repair compound is fully integrated into the **J&J Tile Design** technical guidelines. Prior to application, we highly recommend widening and prepping the cracks using professional diamond blades like the **Montolit CG** or **CGX** (or the ultra-thin **BIHUI B-SPEEDY**). Once cured (approx. 25 minutes), easily grind down the hard excess ridge flush to absolute floor level (wet or dry) using a **Montolit DF120** diamond pad or a **CENTRUMFLEX** backing pad paired with a **Cool PAD grit #0 or #1**. This leaves you with a surgically clean, monolithic subfloor ready for a flawless installation of our hidden WC buttons or flush-mount ventilation profiles.

✅ Key Benefits
  • Extreme Speed: Fully load-bearing, sandable, and coatable just 20–30 minutes after application.
  • Structural Strength: The cured polymer weld delivers greater tensile and compressive strength than the original concrete.
  • Zero Shrinkage: The resin will not shrink or slump as it sets, repels water, and maintains a completely stable volume.
  • Styrene-Free Formula: Eco-friendly, low-odor composition tailored for safe use inside occupied interiors and residential apartments.
⚠️ What to watch out for
  • Very Short Working Time: Requires rapid, precise coordination and setup without any pauses once extrusion begins.
  • Sensitivity to Dust/Grease: If the crack isn't completely vacuumed with an industrial vac, the resin grips the dust layer instead of the concrete, causing the bond to fail.
  • Single-Use Mixing Nozzles: If you stop working for more than 3 minutes, the resin inside the nozzle hardens, requiring a brand new tip.

Questions from the field

Can I use Beton Fix on vertical walls, or will it slump out of the crack?
Beton Fix is formulated with an optimized thixotropic (thick, paste-like) consistency. Once pushed through the mixing nozzle, it stays right where you apply it and will not run. You can confidently use it to repair wall cracks, vertical concrete pillars, or broken corners on stair steps.
Do I need to prime the substrate before applying Beton Fix?
No, in fact – using a primer is strictly forbidden here. This polyester resin acts on the exact same principles as a chemical anchor, needing to lock mechanically directly into the clean pores of the concrete. The single most critical requirement is 100% dust extraction out of the crack.
Is this product suitable for repairing cracks in flowing anhydrite (gypsum-based) floor screeds?
Yes, Beton Fix exhibits exceptional adhesion to both cement-based and anhydrite (gypsum) subfloors. However, before applying it to anhydrite, you must thoroughly grind the surface along the crack (removing the glossy, weak laitance layer), clear out the depth of the crack, and vacuum all dust away perfectly.
J&J Tile Design Guarantee: If you're standing on the job site, looking at a cracked screed, and aren't quite sure if Beton Fix is enough to save this specific subfloor, just give us a call. You won't be dealing with a call-center operator; we will connect you directly with a master tiler who will evaluate your technical layout straight from field experience.

Additional parameters

Category: Adhesives, Sealants, Chemicals
Warranty: 2 years
Weight: 0.3 kg

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