MC (Moisture Cure) is a water based, epoxy waterproof membrane. Primeseal MC is
a high performance, versatile, two-part, water based, hydrostatic pressure
resistant, waterproofing barrier membrane coating suitable for most types
of porous and semi-porous surfaces including green (newly laid) hardened
concrete and damp surfaces. Primeseal MC cures to form a strong, waterproof,
hydrostatic pressure resistant and water vapour pressure barrier and is
formulated for application on to damp, newly laid concrete and most other
construction surfaces. Primeseal MC is suitable for potable (drinking water)
applications and can withstand up to 25 metre head of water pressure. Primeseal
MC's versatility makes it also ideal as a primer for waterproofing membranes,
paints, industrial coatings and as a bridging coating for normally incompatible
coatings. Primeseal MC's standard colour is light grey but is also
available in off-white and black (minimum quantities apply). Primeseal MC has
very low VOCs and meets the 'Green Star' environmental criteria.
PRIMESEAL MC is formulated for demanding waterproofing, sealing and priming
Waterproofs and seals damp and green (newly
laid) hardened concrete.
Waterproofs negative (inside) surfaces.
Waterproofs positive (outside) surfaces.
Waterproofs above and below grade surfaces.
Low water vapour pressure barrier. (Prevents
or minimises bubbling of membranes due to vapour emissions from the substrate).
Waterproofs basements, retaining walls, lift
wells, cellars etc.
Waterproofs tanks and water retaining
structures, i.e. concrete or cementitious structures.
Excellent primer for subsequent Wrimco membranes, paints and industrial coatings.
Seals and primes timber floors prior to
applying waterproofing membranes and other coatings.
Seals concrete floors before laying timber
Primeseal MC is suitable for most construction surfaces including:
Concrete , green (newly laid)
hardened concrete, cement, cement render, brick, block work, masonry,
Hebel, timber, FC sheeting, CFC sheeting, plasterboard and painted or coated
Damp surfaces - but freedom from
standing, running, seeping water, saturated substrates and continual
dampness is essential.
general and universal primer on most types of substrates for membranes, paints
and industrial coatings.
sealer coat over bitumen surfaces to allow the application of solvent and water
based waterproofing membranes and other coatings.
sealer over damp surfaces to allow the application of urethane based
intercoat bridging coating to allow the application of incompatible coatings.
primer and sealer of concrete, cement, cement render, timber, brick, block
work, FC sheeting, CFC sheeting, plasterboard and bituminous surfaces.
primer over bituminous and torch-on membranes so that they can be top-coated or
coat over Crystoflex to provide an attractive colour and finish.
information contained in this product data sheet is typical but does not
constitute a full specification as conditions and specific requirements may
vary from project to project. The instructions should be considered as a
minimum requirement but the applicator or contractor must use their skill,
knowledge and experience to carry out additional works as may be necessary to
meet the requirements of the project. Specification for specific projects
should be sought from the Company in writing.
MC, being an epoxy, has low flexibility and is NOT designed to bridge live cracks
or expansion joints.
Primeseal MC can be effectively used for sealing inside (negative) wall
surfaces, but this should method should only be employed if waterproofing the
outside (positive) surfaces is not feasible or inaccessible.
Application Temperature Limitations: Between 10oC and 35oC.
Temperature must exceed 10oC and
relative humidity must be less than 85%.
If these conditions are not present then
artificial ventilation and heating should be used.
In confined , enclosed areas ventilation
should be used to circulate air to enable the evapouration of water from the
Primeseal MC is not a permanently trafficable membrane, but suitable for
service or trade foot traffic.
Where the product is to be used in hydrostatic water
pressure applications, the surfaces on which it is applied must be
and remain structurally sound and stable.
Primeseal MC is
user and environmentally friendly, solvent free and has
low VOCs and meets the 'Green Star' environmental criteria.
be applied to green (newly laid) hardened concrete.
be applied to damp surfaces.
barrier against low water vapour pressure.
for contact with potable (drinking) water. Conforms to AS4020-2000.
be applied in sensitive areas.
up to 25 meter head of water.
to apply by brush, roller, squeegee and spray.
be used as a primary waterproof barrier on rigid surfaces.
will not re - emulsify.
over most existing coatings.
be used to seal both the negative and the positive sides of the substrate.
with all Wrimco waterproofing membranes and floor coatings.
as a bleed sealer over bituminous surfaces.
primer over torch-on waterproofing products.
MC is water based and contains very low VOC's and is considered safe
to use. However, observe good hygiene and safety practices. The
wearing of gloves and goggles against splashes is strongly recommended. Good
ventilation is recommended and avoid contact with skin, eyes and mouth. If
poisoning occurs contact Poison Information Centre. If swallowed DO NOT induce
vomiting, give plenty of water to drink and seek medical advice. If in eyes
thoroughly flush with clean water, holding lid open to ensure any product maybe
flushed away. If on skin wash with soap and water.
and Surface Preparation
preparation is essential. Surfaces must be sound, stable, dry, clean and free
of dust, loose, flaking, friable material and substances that may diminish
achieve a maximum bond existing coatings, membranes and adhesives should be
removed so that the product can bond directly to the substrate.
Holes, gaps, blowholes, honeycombed surfaces and non-structural cracks
should be suitably filled and made sound using a suitable non-shrink mortar. If
the surfaces needs to be bagged, a bagging mix as follows should be applied to
Before combining, each component should be individually well stirred. Then mix
equal portions of Part A and Part B thoroughly to a homogenous consistency
before application. Avoid undue aeration. Only mix enough product that can
easily be applied within 1 to 2 hours or pot life, which may be effected
by prevailing climate conditions.
Bagging Primer Mix:
If a bagging mix is desired or required due to the condition of the substrate,
it is important that the following mixing sequence is followed. Before
combining, each component should be individually well stirred. Then mix equal
portions of Part A and Part B thoroughly to a homogenous
consistency. Add 30% water and thoroughly mix and then add sufficient
3:1 sand: cement mix to the Primeseal MC liquid to form a brushable or
rollable consistency. Apply to surface, by brush or roller ensuring
that the product is worked well in to the surface and that all holes, voids,
indentations are properly covered. Allow to dry.
by brush, nylon broom, roller, squeegee or spray, in 2 or more coats, at
the recommended application / coverage rate, to produce a uniform, solid
coating. The wet film thickness per coat should approximate 330 microns
If applying Primeseal MC to dry concrete, cement, blockwork or Hebel it is
recommended that the surface be lightly pre-dampened with a fine water spray
before application. The product should be worked well in to the substrate
ensuring that all holes and voids are adequately covered. Avoid pinholes. The
first coat may be thinned up 20% to achieve good penetration depending upon the
type, density and porosity of the surface. Generally, this should not be
required and if possible should be avoided. However, if diluted, coverage must
be adjusted (increased) to achieved net usage and curing times may increase. If
in doubt as to the adequacy of coverage, apply a further coat.
Allow each coat to dry before applying the next.
stated average coverage rate may vary depending upon type, condition, porosity,
texture of the surface and application technique.
an effective waterproofing membrane or barrier against low water vapour
A minimum of 2 coats applied at 3m2 per
litre per coat.
If this coverage is not achieved in two
coats, an additional coat should be applied.
The minimum dry film thickness should be
The waterproofing properties are
enhanced when used in conjunction with suitable Wrimco waterproofing membranes.
Coverage per Kit Size for 2 Coats: 4 Lt. Kit - 6m2. 10 Lt.
Kit - 15m2. 20 Lt. Kit - 30m2
As a general primer: 1 coat applied at 3m2 to 4m2 per litre per
As a bitumen sealer to enable subsequent membranes or coating to be applied: 2
coats applied at 5m2 per litre per coat.
As a sealer of a damp surface to allow the application of a polyurethane
membrane: 2 coats applied at 4m2 per
litre per coat.
Standard colour is a light grey when parts A and B are mixed and
cures to a semi-gloss finish but dulls off with ageing. It is available
in 4,10 and 20 litre kits.
Primeseal MC is also available in black and other colours, by special order and
minimum quantities may apply.
and Curing: Drying and curing of the product is affected by type, dryness and
porosity of the surface, temperature, humidity, ventilation, climate conditions
and application technique and therefore drying and curing can only be given as
is essential that the membrane must not be damaged in any way including
when applying subsequent coatings. Damp and cold surfaces will increase
At 25oC and 50% RH. Touch dry: 3 hours. Recoat Time: 4
hours. Pot Life (Approximately): 2 hours at 25oC & 1
Hours at 35oC. Full Cure: 7 days
In an immersed application, the membrane should be allowed to achieve full cure
prior to filling with water.
Subsequent Treatments: Floor coating: Allow 3 days curing to prevent physical
or mechanical damage. The membrane must be fully cured before applying
decorative coatings, adhesives, mortars and levelling compounds.
Store in a cool, dry area away from direct sun light. Ensure unused product is
sealed properly. Keep out of reach of children.
Up: Wet spills must be promptly be cleaned up with water, but should
be avoided as it is difficult to remove entirely from surfaces.
Topping or Top Coating: Primeseal MC can be directly tiled or topped.
Safety & Precautions: Although
this is a safe product to use product if recommended good safety and
hygiene practices are followed. Refer to products Material Safety Data Sheet.
If using a solvent based adhesive to bond a covering over the surface, it is
essential that the solvent vapours be allowed to fully escape before covering
is applied or the covering allows for the full transmission of solvent vapours.
It is strongly recommended that protective clothing, gloves and eye protection
are worn. Good ventilation is recommended and avoid contact with skin, eyes and
mouth. If poisoning occurs contact Poison Information Centre. If swallowed DO
NOT induce vomiting, give plenty of water to drink and seek medical advice. If
in eyes thoroughly flush with clean water, holding lid open to ensure any
product maybe flushed away. If on skin wash with soap and water