Sika | Damp Proof Cream
SikaMur® InjectoCream-100 is a very high strength (80% Active) Damp Proofing Cream used for the control of rising damp.
SikaMur® InjectoCream-100 is a water repellent, silane-based emulsion. A Foil Applicator (Sausage) Gun is used to inject the cream into a series of holes drilled into a mortar course.
Once injected to the mortar course, SikaMur® InjectoCream-100 will diffuse within the damp wall to form a water repellent barrier (damp-proof course, DPC) and block future rising damp
Supplied in a 600ml Foil Cartridge.
Fast and easy to install, one-component ready to use
No need for preliminary watertight sealing around the injection holes
Quick and consistent application - easy to calculate the amount of material required
No high pressure injection pump required
Spillage and mess virtually eliminated from the site - no problem with fluids flooding through party walls, cavities or service ducts
Concentrated formula with approx. 80% active ingredients
Low hazard, water-based product - non-caustic, non-flammable and not injected under pressure
Very low wastage
No risk of increased efflorescence (as with siliconate-based rising damp treatments)
Where required remove skirting boards and/or render to identify and expose the original masonry and the mortar course to be treated.
Measure the thickness of each wall to be treated.
Set the depth gauge of the drill or apply tape to the drill bit in order to identify the correct drilling depth.
SikaMur® InjectoCream-100 is suitable to treat rising damp in almost all types of masonry walls:
Solid brick walls
Random form stone and rubble infill walls, etc
For treatment to be effective, the correct volume of SikaMur® InjectoCream-100 must be used. The system requires 12 mm diameter holes to be drilled horizontally, no greater than 120 mm apart. The depth of the hole required for various wall thicknesses is shown in the table below. For all other wall thickness, the depth of the holes should be within 40 mm of the opposite side.
Drill horizontally directly into the mortar course, preferably at the base ends of the bricks of the course selected. After drilling, each hole must be thoroughly cleaned using a compressed dry air blower.
Solid brick walls Solid brick walls can be treated from one side in a single operation. This will depend on the length of the drill bit available. Drill the selected masonry mortar course at the prescribed centres to the appropriate depth (refer to table above).
Cavity walls may be treated from one side in a single operation, or each side may be treated separately. When undertaking treatment from one side, drill completely through the selected mortar course, allow the drill bit to pass across the cavity and then drill into the other wall of brickwork to be within 40 mm of the opposite (rear) side. The viscosity of SikaMur® InjectoCream-100 is such that it is possible to treat each side wall from a single drilling operation. Always ensure the cavity is clear before treatment If each side wall is to be treated separately, treat each wall as an individual solid brick wall.
Follow the mortar course at the appropriate selected level. If the stone is of a porous type (e.g. sandstone) then the drilling can be made directly into the porous stone. The variable thicknesses of stone walls and the possibility of rubble infill dropping and blocking the injection holes cause difficulties for any injection system. If these problems occur, either drill into 50% of the wall thickness, from both sides at a corresponding height or drill additional holes, adjacent to the obstructed holes, to ensure that an adequate amount of SikaMur® InjectoCream-100 can be injected to form a continuous DPC.
See below table for number of 600ml Foil Cartridges required for application.
Individual site conditions can cause variations. Always allow at least 10% extra when estimating the quantity of material required.
On external faces of walls, drill holes can be re-pointed using a matched mortar or can be plugged with DPC Injection Plugs (Available in a variety of colours).On internal faces holes can be left open and plaster stopped short of the DPC.
The removal and replacement of internal salt contaminated plaster is an important part of an effective damp-proof course. Salts left behind by rising damp are hygroscopic and can cause future staining independent of any issues with structural dampness.
It is therefore essential to follow specific re-plastering guidelines drawn up for dealing with the particular challenges posed by damp / salt-affected surfaces.
It is advisable to leave walls injected with SikaMur® InjectoCream-100 to dry for as long as possible, and for at least 14 days, before removing excess salts and commencing replastering.
It should be noted that whilst insertion of a chemical DPC inhibits further moisture from rising up into the wall, the moisture present before the DPC will take time to dry out.
A damp wall takes time to dry out. As a general guide, the drying rate is given as 1 month for every 25mm of wall thickness (BRE Digest 163, ‘Drying out buildings’). Thus 230mm will take approximately 9 months to dry. However, the drying processes depend on conditions, ventilation and the type of masonry, so drying may take considerably longer.
Due to the potential prolonged drying of the wall, the following must be considered:
Delay any decoration for 4-6 weeks following re-plastering and allow for good natural ventilation to enhance drying. Do not apply heat or accelerated drying methods.
Do not use wallpaper for at least 12 months (longer on thick walls).
Redecorate using a non vinyl based emulsion.
Maintain good ventilation around walls.
Note: The initial decorations should be regarded as temporary, the final decorations not taking place for at least 12 months after completion of the damp proofing and ancillary work.
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