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Norcros Rock-Tite Mortar Additive – Bulk Buy and Pallet Deals – Exterior Porcelain and Stone System

Norcros Adhesives

Norcros Rock-Tite Mortar Additive

Exterior Porcelain and Stone System

Norcros Rock-Tite Mortar Additive is a fibre reinforced cement mortar additive which has been specifically designed, so that when mixed with sharp sand, it will provide a high strength mortar for bonding concrete, natural stone and porcelain paving slabs to both hardcore and solid bases. The mortar requires the addition of sand and water and contains the specially designed Rock-Tite additives to improve performance, workability and freeze/thaw resistance of the finished mortar mix.

  • Fibre reinforced
  • Suitable for all types of paving slab including porcelain
  • Mix with sand and water
  • High strength
  • System guarantee

You can add this product to your order, however there must be a pallet/half/three-quarter-pallet in the cart to checkout.

Need a custom deal? 0333 344 2655 or info@buythepallet.co.uk

Norcros Rock-Tite Mortar Additive extended information


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.


Mix 1 full bag of Norcros Rock-Tite Mortar Additive (12.5kg) with 75kg of sharp sand. Add sufficient water and mix until a smooth, lump-free mortar with a creamy consistency is achieved.

Norcros Rock-Tite Mortar Additive – APPLICATION

It is essential that all types of paving slab are laid onto a full bed of Mortar Mix (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.

Norcros Rock-Tite Mortar Additive product information

Recommended hardcore depth:Patio Flags / Natural Stone = 75mm to 150mm

Porcelain = 100mm 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. 75kg sharp sand per 12.5kg bag
Approximate coverage per 12.5kg bag (when mixed with 75kg sand):1 x 12.5kg bag of Mortar Additive (6:1 mix) will cover approximately 2m2 at 25mm thickness.
Mortar suitable for thickness:10mm* to 80mm
* Thinner application on to solid bases only

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2 weeks ago

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a month ago

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2 months ago

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4 months ago

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3 years ago

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3 years ago

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