Description and use is one component injection
mortar formulated to stop rising dampness in brickwork, block work,
random rubble filled walls and all types of masonry.
SSDP Injection Mortar is based on ordinary Portland cement, selected
fine quartz aggregates and active waterproofing chemicals. SSDP Injection
Mortar activates due to a chemical reaction between moisture in the
structures and waterproofing chemicals in the mortar, which forms a
crystalline growth that blocks the capillaries, pores and fine cracks
in the mortar joints.
SSDP Injection Mortar is odourless and gives off no toxic vapours.
Preparing and driling prior to drilling
internally, all obstructions should be removed, i.e., plastering and
rendering. Plaster/render should be removed up to a line not less than
300mm above the last visible signs of dampness and/or salt contamination
(using an electrical moisture meter) or 1 m above the d.p.c. whichever
is the higher.
The positioning of the d.p.c. is vital if the damp proofing works ate
to be effective. The d.p.c. should be placed at least 150mm above external
ground level. If the external ground level is above the internal floor
level it is necessary to lower the outside ground (permanently) or to
incorporate in internal waterproof surface treatment, such as SSDP Water
Proofing Slurry to cover the gap between the inserted d.p.c. line and
Holes should be drilled using 16-18 mm drill bits at overall spacings
of 110mm and at an angle of depression of about 30°, finishing in
a mortar bed at the level of the proposed d.p.c.. In solid walls up
to 460mm thick drilling from one side to the thickness of the wall (and
at the 30° angle), should result in a hole terminating 50mm or so
from the far side. It may occasionally be advantageous to drill from
both sides i.e.,random stonework with rubble infill or thick walls.
Drilling should stop just over half way through the wall, the holes
being at staggered centres of 110mm.
Prior to application SSDP Injection Mortar all drilled holes should
be flushed out with water to remove any dust. SSDP Injection Mortar
should always be injected into damp holes.
In walls less than 120mm thick, rather than drill holes, the mortar
bed as the desired level is raked out to between one third and one half
its depth. The mortar bed should be flushed with water to remove debris
and the injection mortar applied by trowel into the joint. The mortar
should be made up to a stiffer than usual consistency. The joint should
be filled to within 8mm of the front face. Re-point using 3:1 washed
sharp sand : cement using Salt Inhibitor Render Additive.
Application of SSDP Injection Mortar. A hand caulking gun is used. The nozzle of the gun is inserted into
the holes to the full depth and slowly withdrawn whilst filling the
hole with SSDP Injection Mortar. SSDP Injection Mortar should be stopped
approximately 50mm from the top of the hole. Once all holes are to this
stage it may be necessary to top up due to SSDP Injection Mortar finding
its way into any voids or fine crack. Once SSDP Injection Mortar has
set, the holes should be plugged up with 3:1 washed sharp sand : cement,
using Salt Inhibitor Render Additive.
Mixing of SSDP Injection Mortar. Mix the SSDP Injection Mortar
at the ration of 2 to 3 parts water by volume to 5 parts powder by volume.
Add the water to the powder. Mix thoroughly until the consistency of
smooth cream is achieved, using a mechanical whisk if possible. Allow
to stand for a few minutes, the mortar will ‘false’ set.
Re-stir, the mortar should remain useable for approximately 20 minutes
with occasional further stirring. Do not add extra water to the mix
when re-stirring. Do not mix more mortar than can be used within 20
Re-plastering and decorating. Re-plastering using a salt retardant
render additive if hydroscopic salts and residual moisture are to be
successfully held back.
The substrate to be rendered should be prepared in accordance with the
good practice. Surfaces should be clean sound and free from contaminating
residues of gypsum plasters, bitumen coatings etc. apply two coats of
render, the first being a 3:1 washed sharp sand : Portland cement mix
Salt Inhibitor incorporated in the gauging liquid. Apply a minimum thickness
of 10mm, second coat being a 4:1 washed sharp sand : Portland cement
mix but without the Salt Inhibitor. A mortar plasticizer may be used
if required. Apply to a thickness of 10mm. The finish coat should be
porous skim plaster applied when the cement render coats are fully cured.
Once re-plastering is complete and dry, one coat of trade Matt emulsion
can be applied (no oil based paints).
Storage and packaging. SSDP Injection Mortar
is supplied in 25kg plastic tubs and should be stored in a dry enclosed
area. Un- opened tubs have a shelf life of 12 months.
Health and safety. SSDP Injection Mortar
contains ordinary Portland cement and is alkaline when mixed. In the
case of contact with eyes or skin wash immediately with water. Obtain
medical attention if irritation persists. If swallowed, do not induce
vomiting, wash mouth out and drink water. Seek medical attention. Rubber
gauntlet type gloves should be worn and goggles and mask should be worn
during mixing. Keep away from animals, children and food stuffs. For
further information see separate Health Safety Data Sheet.