Norcros Rock-Tite Mortar is a fibre reinforced sand:cement mortar specifically designed for bonding concrete, natural stone and porcelain paving slabs to both hardcore and solid bases. The mortar only requires the addition of water and contains the specially designed Rock-Tite additives to improve performance, workability and freeze/thaw resistance of the mortar mix.
It is essential that the sub-base is level, stable, not liable to settlement or lifting and is able to fully support the intended finished surface. Hardcore must be fully and tightly compacted. It should be noted that when slabs are to be laid up to a building then a gradual slope of about 25mm in every 1.5m should be created away from the building to ensure all water drains off. Alternatively, a drainage channel should be installed.
Add approximately 3.75 litres of water to a suitable mixing vessel and slowly add the contents of the 25kg bag.
Mix mechanically until a smooth, lump-free mortar is achieved. Do not add extra water.
It is essential that all types of paving slab are laid onto a full bed of Norcros Rock-Tite Mortar (spot bedding or ‘dot and dab’ fixing is not recommended as voids beneath the slabs are points of weakness). The back of all porcelain slabs must be primed using Norcros Rock-Tite Porcelain Primer before fixing.
Store in dry internal conditions away from direct sunlight between 5oC to 25oC. The product has an 18 month shelf life from date of manufacture. It should be noted that puncturing the bag will cause the product to harden.
| Recommended hardcore depth: | Patio Flags / Natural Stone = 75mm to 150mm |
| Recommended mortar thickness on hardcore: | Approx. 50mm where possible however a minimum of 25mm may be used on hardcore with a depth of not less than 100mm. |
| Setting time: | Approx. 24 hours |
| Mix ratio: | Approx. 3.75 litres water / 25kg bag |
| Approximate coverage/ 25kg bag: | 10mm thick = 1.4m2 50mm thick = 0.3m2 |
| Mortar suitable for thickness: | 10mm* to 80mm |
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