Sikadur 31 CF Normal - Epoxy Adhesive & Repair Mortar

Moisture Tolerant, High Strength Structural Epoxy Adhesive and Repair Mortar

Sikadur-31 CF Normal is a moisture-tolerant, thixotropic, structural 2-component adhesive and repair mortar based on epoxy resins and special fillers. Designed for use between +10 °C and +30 °C, this high-strength adhesive offers excellent adhesion to most construction materials and is non-sagging for vertical and overhead applications.

Uses:

As a structural adhesive and mortar for bonding:

• Concrete elements
• Hard natural stone
• Ceramics, fiber cement
• Mortar, Bricks, Masonry
• Steel, Iron, Aluminium
• Wood
• Polyester, Epoxy
• Glass

As a repair mortar and adhesive for:

• Corners and edges
• Holes and void filling
• Vertical and overhead use

For joint filling and crack sealing, including joint and crack arris/edge repair.

Characteristics / Advantages:

• Easy to mix and apply
• Very good adhesion to most construction materials
• High strength adhesive
• Thixotropic: non-sag in vertical and overhead applications
• Hardens without shrinkage
• Different coloured components (for mixing control)
• No primer needed
• High initial and ultimate mechanical strength
• Good abrasion resistance
• Impermeable to liquids and water vapour
• Good chemical resistance

Approvals / Certificates:

• Adhesive for structural bonding tested according to EN 1504-4, CE marked
• AS/NZS 4020:2018 Potable Water Approved

Product Information:

• Composition: Epoxy resin
• Packaging: 6 kg (A+B), 30 kg (A+B) pre-batched units
• Shelf life: 24 months from date of production
• Storage conditions: Dry conditions, +5 °C to +30 °C, in original, unopened packaging, protected from direct sunlight
• Colour: Component A (white), Component B (dark grey), Mixed (concrete grey)
• Density (Mixed A+B at +23°C): 1.90 ± 0.1 kg/l (evacuated)

Application Information:

• Mixing ratio (A:B by weight or volume): 2 : 1
• Consumption: ~ 1.9 kg/m² per mm of thickness
• Layer thickness: 2 mm min. / 30 mm max.
• Sag flow: Non-sag up to 15 mm thickness on vertical surfaces
• Material/Ambient air/Substrate temperature: +10 °C min. / +30 °C max.
• Substrate moisture content: Dry or mat damp (no standing water)
• Pot Life (200 g):
  • +10 °C: ~ 145 minutes
  • +23 °C: ~ 55 minutes
  • +30 °C: ~ 35 minutes

Application Instructions:

Substrate Quality: Concrete/mortar (>28 days), masonry, natural stone must be sound, clean, dry or mat damp, and free of contaminants. Steel should be de-rusted to Sa 2.5.

Substrate Preparation: Clean surfaces thoroughly by mechanical means (blast cleaning, etc.) to achieve a laitance and contaminant-free, open-textured surface.

Mixing: Mix pre-batched components A+B for at least 3 minutes with a slow-speed mixer until a uniform grey colour and smooth consistency are achieved. Avoid aeration. Re-mix in a clean container for another minute.

Application: Apply adhesive with a spatula, trowel, or notched trowel. For repair mortar, use formwork. Support bonded metal profiles on vertical surfaces for at least 12 hours. Check adhesion after hardening.

Cleaning of Equipment: Clean tools immediately with Sika Colma Cleaner. Cured material can only be removed mechanically.

Get unbeatable trade prices and fast nationwide shipping on all Sika products. Pick up your order from our store, Sika Wetherill Park in Sydney, or any Sika warehouse nationwide. 

Colour Accuracy Disclaimer: We have taken care to display the most accurate visuals of our products. However, we are not responsible for the colour accuracy of the device you are viewing our swatches on. These variations arise due to different computer monitors and devices (make, model and technology, as well as resolution, contrast and brightness control settings) in much the same way a scan will differ from an original image and a colour photocopy. Furthermore, coatings can exhibit variation in perceived colour depending on gloss level and application method. If you require a very specific colour match, please make your selection via actual swatches and colour boards available at our showroom.

Product Disclaimer: Ensure you read all product, technical and safety data sheets prior to application as liability falls on the applicator. All products must be applied in accordance with manufacturer’s recommended method.