Everbuild 507 Rendagrip Render Bonding Agent 10L

Everbuild® 507 RendaGrip – 10 L

High-performance, quick-drying render bonding agent with fine aggregate suspended in a waterproof polymer. Designed to deliver extra mechanical key and improved adhesion for external render applications, particularly on smooth or porous substrates.

Key benefits

• Provides a reliable mechanical key with fine aggregate evenly distributed for superior adhesion.
• One coat and render when dry—simple, time-saving application.
• Red colour indicates full coverage, helping to prevent missed spots.
• Reduces suction on porous materials and improves adhesion on smooth surfaces.
• Waterproof formulation, enabling application even on damp substrates.

Typical applications

• External render bonding on concrete, brickwork, lightweight blockwork, and other masonry surfaces.
• Surface preparation for render on challenging substrates such as smooth or low-suction materials.

Usage guidance

• Stir well before use to ensure uniform distribution of aggregates.
• Use only one coat—apply evenly with a short-pile roller or brush.
• Ensure ambient temperature and substrate are above 5 °C before application.
• Remove splashes immediately with warm soapy water.
• Allow a minimum drying time of around 6 hours (longer in colder conditions) before rendering.

Product details

• Pack size: 10 L pail.
• Appearance: Red liquid with fine aggregate suspended in a waterproof polymer.
• Viscosity: 15 000–50 000 cP at 23 °C.
• Minimum film-forming temperature: approximately 5 °C.
• Bond strength (EN 13892-8): 3.2 N/mm².
• High-temperature stability: stable when stored at 50 °C for 4 weeks.
• pH: 8.0–9.5.
• Shelf life: up to 24 months in original, unopened containers; store between 5–25 °C away from frost.

Good to know

Not suitable for areas with constant damp exposure. Keep the total render system thickness below 25 mm. If substrate quality is uncertain, perform a small test area before full application.