Natural Stone Repair
The Keim Restauro system provides a complete range of products for the cleaning, consolidation, repair and preservation of natural stone.
Due to the specialised nature of these products, and the highly sensitive areas of their application, advice must be sought from Keim Mineral Paints.
Restoring damaged natural stone requires appropriate materials and methods in order to retain and protect stone and to reproduce its original appearance.
Natural stone restoration encompasses a range of different measures and processes which may have a preservative, restorative and/or preventive action.
- Stone consolidation
- Stone reinstatement
- Stone replacement
- Stone cleaning
- Water repellent finish
- Coatings
Stone consolidation is a restorative stone preservation measure. The aim of successful stone consolidation is to recreate the original strength of the material.
Stone replacement mortars are used for reconstructing stone. The Keim Restauro range of dry bagged, mineral-based restoration mortars are ideal for repairing damage to natural stone surfaces:
Protection from water or moisture is among the classic stone preservation methods. On impregnation, water repellents penetrate into the surface of the building material, so imparting water repellency. The Keim Restauro range offers various options for providing a water repellent finish on natural stone surfaces with the aim of reducing absorption of water and pollutants:
The low-pigment products from the Keim Restauro range provide ideal unique solutions. Due to its water repellency, Keim Restauro-Lasur, a sol/silicate based, low-pigment coating for natural stone, protects natural stone by reducing the absorption of water and pollutants. Depending upon the level of dilution with Keim Restauro-Fixativ, Keim Restauro-Lasur produces a low-pigment finish enabling individual natural stone colouring and unobtrusive colour matching of repairs.
KEIM Silex-OH - KEIM Silex-OH is a colourless consolidant based on silicic acid ester. For the use on any porous mineral substrate, particularly suitable for reconsolidating leached sandstone.
KEIM Restauro-Fixativ - Primer and thinner for KEIM Restauro-Lasur and KEIM Restauro-Variolasur in variant H.
KEIM Restauro-Lasur - KEIM Restauro-Lasur is particularly suited for providing translucent, low-pigmented coatings on sandstone surfaces, e.g. to match the colour of repairs to the original stone substrate.
KEIM Restauro-Fuge (joint mortar) - KEIM Restauro®-Fuge is a joint mortar, especially for natural stone walls, but also for other fair-faced masonry (brickwork, calcareous sandstone etc.).
KEIM Restauro-Top (finish mortar) - KEIM Restauro-Top is a finish mortar suitable as natural stone replacement material for surface zones for reproducing the colour and texture of the original stone on the object, but may also be cast in open forms.
KEIM Restauro-Grund (base mortar) - KEIM Restauro-Grund is a base mortar suitable as natural stone replacement material for lining deep areas of damage (> 2 cm) and as core material for open form casting.
Market Hall facade, Douglas - Restoration works of the Douglas Market Hall portico using KEIM Restauro; the complete stone restoration system.
Murdoch Chamber, South Quay, Douglas - Natural sandstone restoration works complete at Murdoch Chambers, South Quay, Douglas using KEIM Restauro system to restore damaged natural stone requires appropriate materials and methods in order to retain and protect stone and to reproduce its original appearance. 
Christ Church, Rushen - The interior re-ordering and refurbishment of Christ Church, Rushen, was carried out using Keim lime plasters, Keim Optil mineral paints and Keim Restauro natural stone restoration products to create a clean, dry, bright finish to the church interiors.
No. 2 Ravenscliffe, Laxey - This property demanded a range of different treatments on each different elevation. Keim systems were utilised in combination, resulting in a minimum 15 year warranty.
Douglas Town Hall - Restoration of the natural stone of the front and side elevations of the Town Hall using the KEIM Restauro range of products for the cleaning, consolidation, repair and preservation of the natural stone.