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KEY BENEFITS

  • Very high tensile strength​
  • Bridge and reinforce cracks, joints and subfloors nature changes​
  • Avoids the use of repair resins

CHARACTERISTICS

  • Composition: High-performance fiber glass.
  • Color: White.
  • Format: Roll 20 m² (0,8m x 25m)
  • Basis Weight: 78 g/m²
  • Tensile Strength : 3.500 N/mm²
  • Elastic Modulus : 72.000 N/mm²

Performance & Reinforcement

With very high tensile strength and controlled elongation, the fleece reinforces weak areas and distributes stress across the substrate. It is designed to bridge cracks and joints effectively, reducing the need for resin-based crack repair methods in certain applications.

Application Versatility

Suitable for a wide range of substrates including concrete, cementitious and calcium sulphate screeds, timber, tiles and metal surfaces, RENO U720 CONNECT supports diverse site conditions. It is also compatible with underfloor heating systems, maintaining performance across temperature variations.

Installation Method

The fleece is cut to size and embedded into fresh repair mortar or epoxy resin applied either side of the crack or joint. Sheets are installed perpendicular to the crack direction and overlapped by 5–10 cm where required. Once fully encapsulated and cured, the surface is ready for subsequent flooring systems.

System Integration

RENO U720 CONNECT integrates with Bostik repair mortars such as RENO C920 ST and RENO C950 QUICK, as well as epoxy systems. This allows it to be used as part of a structured repair approach for cracks, joints and substrate transitions prior to floor installation.

Handling & Storage

Supplied in roll format, the material can be easily cut and applied on site. It offers a shelf life of up to 24 months when stored in original packaging in cool, dry conditions. Rolls should be stored upright to maintain performance.

Application process: RENO U720 CONNECT

Quick Application Steps (On-Site Guide)

  • Prepare: Ensure cracks/joints and substrate are clean, dry and properly primed
  • Apply base layer: Spread repair mortar or epoxy across crack zone
  • Install: Embed fleece perpendicular to crack and press into wet layer
  • Overlap: Maintain 5–10 cm overlap where multiple sheets are used
  • Finish: Allow to set before continuing with flooring system

1. Subfloor preparation

Effective crack bridging relies on correct surface preparation:

  • Substrate must be sound, dry and free from contaminants such as dust, grease or oil
  • Remove weak layers, coatings and adhesive residues using mechanical methods
  • Vacuum thoroughly to ensure a clean, dust-free surface
  • Smooth or dense substrates should be abraded and degreased
  • Apply a suitable primer where required depending on system

All substrates must meet relevant site standards prior to application.

2. Crack and joint preparation

  • Cracks ≤0.3 mm can be treated directly without opening
  • Cracks ≥0.3 mm should be opened using appropriate cutting tools
  • Vacuum thoroughly to remove dust and debris
  • For larger cracks (>1 mm), confirm structural suitability before repair
  • Ensure joints are clean and free from loose material

Proper preparation ensures optimal bonding and reinforcement.

3. Application

  • Apply a thin, even layer of repair mortar or epoxy at least 30 cm either side of the crack
  • Place pre-cut fleece strips (approx. 50 cm length) perpendicular to the crack
  • Press firmly along the full length to ensure full contact and embedment
  • Apply additional material over the fleece to fully encapsulate it
  • Where multiple strips are required, overlap by 5–10 cm
  • Allow the system to set before applying further layers

Designed to bridge cracks and accommodate substrate movement without resin injection.

4. Drying & curing

  • Allow base material (mortar or epoxy) to cure before proceeding

Typical next steps:

  • Apply levelling compound or flooring system once fully set
  • Refer to mortar or resin TDS for exact curing times

5. Underfloor heating

  • Switch off heating systems 48 hours before, during, and for at least 48 hours after application
  • Gradually bring system back to operating temperature after curing

Common mistakes to avoid

  • Not preparing cracks properly before installation
  • Insufficient embedment of fleece within base layer
  • Incorrect orientation (not perpendicular to crack)
  • Lack of overlap between fleece strips
  • Applying onto contaminated or dusty substrates
  • Skipping primer where required
  • Applying outside recommended temperature range (+15°C to +30°C)

Frequently Asked Questions

Static cracks in screeds should be repaired using a resin such as RENO P520 EASY or RENO E742 STRUCTURE, followed by sand broadcasting to ensure adhesion. If reinforcement is required, a fiberglass mesh such as RENO U720 or U736 CONNECT can be applied in combination with repair mortars.

Underlays are presented as products that provide stability, reduce noise and enhance comfort, helping create a smooth and durable foundation for flooring renovation. Depending on the product, they can also stabilize weak subfloors, relieve tensions or bridge critical areas.

The available underlay solutions include a sound impact insulation underlay, reinforcement mesh for substrates stabilization, fiberglass reinforcement fleece for crack and joint bridging, a stress-relieving and decoupling underlay, and decoupling and insulating polyester boards.

Cracks can be reinforced using fiberglass reinforcement systems embedded in repair materials. RENO U720 CONNECT and RENO U736 CONNECT are designed to bridge and reinforce cracks and joints when used with repair mortars or epoxy resins.

Both RENO U720 CONNECT and RENO U736 CONNECT are fiberglass reinforcement fleeces used for crack bridging and reinforcement. RENO U720 CONNECT is supplied in roll format, while RENO U736 CONNECT is supplied as pre-cut sheets. The choice mainly depends on installation preference.

Bridging mesh is used to reinforce cracks and joints, ensuring stability across areas where substrate movement may occur.

Cracked or weak subfloors can be reinforced using fiberglass systems. RENO U720 CONNECT and RENO U736 CONNECT bridge and reinforce cracks and joints when embedded in repair mortar or resin. RENO U550 REINFORCE stabilises weak substrates and distributes pressure across the surface.

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