Fosroc Nitobond Ep Std Two Component Epoxy Bonding Agent (Grey Paste, 4kg)

✅ What is Nitobond EP Std Nitobond EP Std is a two-component, solvent-free epoxy resin bonding agent supplied in pre-weighed "kit" form (resin + hardener). It's designed to bond new concrete or mortar to existing cementitious substrates — i.e. old concrete, masonry, or repair flooring — ensuring strong adhesion and structural integrity. 🔧 Typical Uses / Applications Bonding fresh or new concrete/mortar to existing concrete or masonry surfaces. Structural repairs: overlays, floor toppings, patch repairs, grouting of dowel bars or starter bars, industrial floor repair, bonded or granolithic floor toppings. Suitable for both horizontal and vertical surfaces, including situations where formwork supports the new layer Can be used indoors or outdoors; on dry or slightly damp (SSD) concrete surfaces. 📊 Key Properties & Performance Here are typical technical data / performance metrics of Nitobond EP Std (at ~20 °C unless specified): Property / FeatureTypical Value / Description Compressive Strength (7 days) ~ 50 MPa Tensile Strength (7 days) ~ 20 MPa Flexural Strength (7 days) ~ 35 MPa Shear / Bond (slant-shear) Strength ~ 25 N/mm² (bond to concrete often exceeds concrete's own tensile strength) Pot Life (working time) ~ 35-45 minutes @ 20 °C Overlay Time / "Open Time" Up to ~90 minutes at 20 °C (for standard grade) VOC / Solvent Solvent-free, low VOC — safer in enclosed or indoor areas. Substrate Conditions Can be applied on dry or saturated-surface dry (SSD) concrete or mortar surfaces. 🧰 Application & Handling The two components (base + hardener) must be mixed thoroughly. Usually the hardener is poured into the resin/base container and mixed until a uniform colour is achieved — visual cue ("base white + hardener green → uniform grey/colour") ensures proper mixing. Substrate must be clean, sound, free of dust/laitance/loose material, oil/grease, paint, coatings, etc.. Often the surface is roughened (light scabbling, wire-brushing or grit-blasting) to expose aggregate for better bond. Once mixed, apply by brush (or spray with suitable equipment) to prepared surface. After application, new concrete or mortar should be placed within the overlay/open time window — before the epoxy skin forms and while still tacky. For standard grade: ~90 min at 20 °C; for some slow-set versions, overlay time may be longer (depending on temperature and ambient conditions).