Wrimco Waterproofing                              Home  | Specification | Product | Project | Technical data A-Z | Contact us

Adhesive Membrane

Anti-root Membrane

Approved Applicators

Backing Rod

Drainage Cell

Drainage Sheet

Epoxy Adhesive

Epoxy Flooring

Flat Roof Membrane  

Foundation Membrane

Liquid Membrane

Membrane Protection

Product Application

Product Category

Retaining Wall

SBS Sheet Membrane

Torch on Membrane

Under Slab Membrane

Vapour Barriers

Waterproofing Primer


Waterproof Balcony Liquid Membrane Waterproof Retaining Wall Liquid Rubber Membrane How to waterproof a bathroom Waterproof Internal Wet Area Membrane Waterproof Tiled Balcony Clear Penetrating Sealer Trafficable liquid membrane UV Protection Polyurethane Membrane Waterproof Water Feature liquid membrane Hydro Pressure Resistant liquid membrane Waterproof fish pond liquid membrane waterproof bathroom liquid membrane Waterproof above screed liquid membrane UV Stable Polyurethane Membrane Waterproof leaking balcony liquid membrane waterproof damp basement wall liquid membrane Solutions to common waterproofing problems Maxseal Foundation Waterproof wet basement wall liquid membrane Kemseal PU Polyurethane Membrane Waterproof Metal Roof Liquid Membrane Repair Leaking Balcony, Flat Roof, Planter Box, Bathroom Waterproofer Waterproof Box gutter liquid membrane Waterproof Retaining Wall liquid membrane Waterproof Internal, External Wall Liquid Membrane Waterproof Concrete Slab Liquid Membrane Waterproof Balcony Liquid Membrane Stop Leaking Shower Liquid Membrane How to waterproof a retaining wall How to waterproof a Retaining Wall How to fix leaking fish pond Waterproof Garage Roof Liquid Rubber Membrane Waterproof water tanks liquid membrane Waterproof Leaking Roof, Gutters, Balcony, Car Park tradesman Waterproof leaking box gutters tradesman Repair Leaking Balcony, Flat Roof, Planter Box, Bathroom Waterproofer   Repair Leaking Balcony, Flat Roof, Planter Box, Bathroom Waterproofer   HiBuild Hydrastatic Water based Epoxy Prevent and Fix Rising Damp Waterproofing Epoxy Waterproof exposed balcony liquid membrane Repair leaking Water Tank licensed Waterproofer Repair Leaking Fire Water Tank Licensed Contractors  Waterproofing Leaking Basement Licensed Water proofer Sikalastic 488 UV Trafficable Polyurethane Liquid Membrane SikaTite UnderTile Rapid Waterproof leaking water tanks tradesman Waterproof leaking metal roof contractors Waterproof Retaining Wall, Planter Box Liquid Membrane How to waterproof a planter box  How to waterproof a leaking metal roof gutter Waterproof Leaking Metal Roof, Metal Gutters Tradesmen Waterproof Metal Roof Liquid Rubber Membrane Waterproof Planter Box Liquid Rubber Membrane Waterproof flat roof liquid membrane Prevent Rising Damp  Waterproof Roof, Balcony, Planter Box, Bathroom Membrane Waterproof Water Tanks Liquid Membrane Waterproof Leaking Swimming Pool, Garden Fish Pond, Water pool, Water feature Tradesman  waterproof leaking deck, verandah, terrace tradesman Waterproof Leaking Fish Pond Tradesman Repair & Maintenance Bitumen Roof Licensed Waterproofer Sikalastic 1K Waterproof Swimming Pool Liquid Membrane Waterproof Planter Box Liquid Membrane Waterproof Planter Box Liquid Membrane Traffic Car Park Deck Waterproofing System Waterproof Wet Area, Shower Liquid Membrane Repair Balcony Liquid Waterproofing Membrane Waterproof Under tiles Liquid membrane Waterproof leaking box gutters liquid membrane  Waterproof Leaking Metal Roof, Colorbond Roof, Aluminium Roof tradesman Waterproof Shower Liquid Rubber Membrane Repair Roof Gutters Roof Flashing Liquid Membrane Waterproof Deck Balcony Liquid Membrane Soudagum Hydro  Bitumen Paint Sika Waterproof Underground wall Liquid Membrane Waterproof Water Tanks Liquid Membrane Waterproof Lift Pit Liquid Membrane Waterproof Flat Roof Liquid Membrane Waterproof Leaking Shower Waterproof Swimming Pool Liquid Membrane Low VOC Polyurethane liquid membrane Waterproof Leaking Plant Room, Machine Room Contractors Waterproof Exposed Deck , Balcony Liquid Membrane ARDEX WPM 001 - Undertile Waterproofing Membrane Waterproof Box Gutters Liquid Membrane Repair Bitumen Roof Liquid Membrane Repair Leaking Roofs Gutter, Box Gutter Waterproofer Waterproof Leaking Roof, Ceiling, Shower, Internal Walls tradesman Waterproof Leaking Flat Roof, Planter Box, Retaining Wall, Basement tradesman Repair Leaking underground basement wall Waterproofer Waterproof Leaking Balcony Liquid membrane How to stop tiled deck leaking Waterproof External Brick Wall liquid membrane Waterproof Retaining Wall Liquid Membrane Waterproof Retaining Wall Liquid Membrane ARDEX WPM 002  Liquid Membrane Water Based Acrylic Liquid Membrane Dampfix 2 Emer Clad Acrylic Liquid Membrane Waterproof Leaking External Wall Licensed Waterproofer Waterproof Under Screed Liquid Membrane Aquagard M 40R Waterproof Leaking Box Gutter Licensed Tradesmen Waterproof leaking bitumen roof contractors Waterproof Dincel Wall Liquid Membrane Waterproof Besser Block Wall Liquid Membrane Waterproof Storage Water Tank, Detention Water Tank Tradesman Waterproof Commercial Residential Roof Liquid Membrane Waterproof Commercial Residential Roof Liquid Membrane Waterproof Leaking Colorbond roof, Metal roof, Concrete & Clay roof tradesman Waterproof Concrete Besser Block, Brick Retaining Wall Liquid Membrane Alsan Flashing Installation instruction
Commercial Building Sheet Membrane Concrete Roof Sheet Membrane Waterproof Deck Sheet Membrane Entertainment building Waterproofing Membrane Waterproof Government Building Sheet Membrane Waterproof Hospital Building Sheet Membrane Waterproof Landmark Building Bitumen Membrane Waterproofing Planter Box Sheet Membrane Waterproof Plywood Roof Sheet Membrane Waterproof Residential Building Sheet Membrane Waterproof Roof Bitumen Sheet Membrane Waterproof Flat Roof Sheet Membrane Waterproof Retaining Wall Sheet Membrane Terrace waterproofing Sheet Membrane Waterproof University Building Sheet Membrane Wrimco Reference Waterproof Lift Pit Sheet Membrane Waterproof Concrete Roof Sheet Membrane Tanking Sheet Membrane Systems Vaucluse Waterproofing Project  Mosman Waterproofing Project Waterproofing Palm Beach Waterproofing Dover Height Waterproofing Darling Point Waterproofing Bellevue Hill waterproofing tradesman Knowledge Base FAQ Waterproofing Product Waterproof Leaking Garage Roof tradesman Repair SBS, APP Sheet Membrane Waterproof Concrete Slab Sheet Membrane Waterproof Leaking Garage Roof Liquid Rubber Membrane Waterproof Leaking Metal Roof Liquid Rubber Membrane Waterproof Balustrade Sheet Membrane Waterproof Commercial Building Project Bitumen Sheet Membrane Closed Cell Backing Rod Repair Crack Joints Closed cell backer rod Backing Rod Sikalastic 621 TC UV Stable Polyurethane Membrane Ardex WPM 300 Epoxy - Stop Rising Damp Bitumen membrane with root inhibitors Duraflex Grey Waterproof Concrete Slab, Retaining Wall Sheet Membrane Waterproof Retaining with Sheet Membrane 20 Years Warranty Sheet Waterproofing Membrane System Tremproof 3300 Self Adhesive Sheet Membrane Waterproof Concrete Slab, Retaining Wall Sheet Membrane How to find the Leaks Stop Basement Rising Damp Waterproofing Membrane Protection Drainage Sheet Retaining Wall Drainage Sheet Soprema Stratec IIS Synthetic Roof Underlayer Ardex WPM750 Undertile Butynol Adhesive Repair Leaking Deck, Patio, Balcony Waterproofer Waterproof Basement Rising Damp Tradesmen Projects Waterproofed with Wrimco Sheet Membrane Waterproof Retaining walls sheet membrane Waterproof Balcony Sheet Membrane Waterproof Commercial High Rise Building Roof Contractors Self Adhesive Sheet Membrane Butynol Rubber Waterproofing System Ecotorch Sheet Membrane Self Adhesive Sheet Membrane Butynol Waterproofing System Waterproof Car Park Roof with sheet membrane Torch applied Mineral topping Sheet Membrane ARDEX WPM 185  APP Sheet Membrane Ardex WPM188 SBS Garden Tanking Membrane Waterproof Deck with torch applied Sheet Membrane Waterproof Planter Box, Retaining wall liquid membrane ARDEX WPM 1000 Weldable Waterproofing Membrane  SBS Sheet Membrane Installation ARDEX WPM 3000X Self Adhesive Sheet Membrane ARDEX WPM 750 Undertile Butynol Waterproof Concrete Slab with Sheet Membrane Waterproof Leaking Swimming Pool tradesman Ardex WPM 444 APP Bitumen Sheet Membrane How to waterproof a Retaining wall How to waterproof a Planter Box How to waterproof a planter box  How to waterproof Tiled Balcony How to waterproof a Shower Sika Acrylic Joint Sealant Anti Corrosion Epoxy Coating SikaTop-110 EpoCem Waterproof Lift Pits Sheet Membrane Anti Slip Water Based Waterproofing Coating Sika Joint Sealants Primer Torchflex SBS Sheet Waterproofing Membrane Epoxy Resin Bonding Agent Swimming Pool Neutral curing Silicone Sikaflex Pro polyurethane joint Sealant  How to waterproof balcony with sheet membrane Anti Root Sheet Membrane Ardex WPM188 UV Stable Polyurethane Coating UV Stable Polyurethane Waterproofing Liquid Membrane Mapelastic Smart Cementitious Membrane Sikadur 52 - Low viscosity epoxy resin Polyurea and Polyurethane Liquid Membrane Construction Site Protection Board Repair Bitumen Roof Liquid Membrane UV Resistant Water Based Liquid Membrane Waterproof Lift Pits licensed Contractors Waterproof Leaking Basement, Underground Tradesman Repair Leaking Roof, Gutters, Balcony, Car Park Contractors Waterproof Leaking Deck, Verandah tradesman Repair Metal Roof Liquid Membrane Sikalastic 560 - Repair Existing Waterproofing Membrane Flat Roof Waterproofing Planter Box Waterproofing Waterproof Balconies Decks Podiums Waterproofing Sheet Liquid Membrane Basement Retaining Wall Waterproofing System Waterproof Concrete Slab with torch applied sheet membrane How to waterproof a planter box Waterproof Leaking Retaining Wall, Basement Wall tradesman Under Concrete Slab waterproofing Ardex HydrEpoxy WPM 300 Waterproof Car Park Liquid Membrane Vulkem 360NF Waterproof Leaking Fire Water Storage Tanks Waterproofer

Stop Basement Rising Damp


Primeseal 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 applications including: 

  • 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 floors.  

Suitable Surfaces

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 surfaces.
Damp surfaces - but freedom from standing, running, seeping water, saturated substrates and continual dampness is essential.

Additional Uses 

  • A general and universal primer on most types of substrates for membranes, paints and industrial coatings.
  • A sealer coat over bitumen surfaces to allow the application of solvent and water based waterproofing membranes and other coatings.
  • A sealer over damp surfaces to allow the application of urethane based waterproofing membranes.
  • An intercoat bridging coating to allow the application of incompatible coatings.
  • A primer and sealer of concrete, cement, cement render, timber, brick, block work, FC sheeting, CFC sheeting, plasterboard and bituminous surfaces.
  • A primer over bituminous and torch-on membranes so that they can be top-coated or re-membraned.
  • Top coat over Crystoflex to provide an attractive colour and finish. 


The 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.


Primeseal 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.

Curing Limitations: 

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 product.
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.

Benefits and Advantages   

  • Primeseal MC is user and environmentally friendly, solvent free and has negligible odour.
  • Very low VOCs and meets the 'Green Star' environmental criteria.
  • Can be applied to green (newly laid) hardened concrete.
  • Can be applied to damp surfaces.
  • Is a barrier against low water vapour pressure.
  • Suitable for contact with potable (drinking) water. Conforms to AS4020-2000.
  • Non-toxic and non-flammable.
  • Can be applied in sensitive areas.
  • Withstands up to 25 meter head of water.
  • Easy to apply by brush, roller, squeegee and spray.
  • Quick drying.
  • Has excellent adhesion.
  • Excellent water barrier.
  • Can be used as a primary waterproof barrier on rigid surfaces.
  • It will not re - emulsify.
  • Seals over most existing coatings.
  • Can be used to seal both the negative and the positive sides of the substrate.
  • Compatible with all Wrimco waterproofing membranes and floor coatings.
  • Acts as a bleed sealer over bituminous surfaces.
  • Excellent primer over torch-on waterproofing products.  

Precautions in Use  

Primeseal 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.

Priming and Surface Preparation

Good preparation is essential. Surfaces must be sound, stable, dry, clean and free of dust, loose, flaking, friable material and substances that may diminish adhesion.  

To 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 the surface.

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.


Apply 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 (0.33mm).

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.


The stated average coverage rate may vary depending upon type, condition, porosity, texture of the surface and application technique.  

As an effective waterproofing membrane or barrier against low water vapour pressure:
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 0.33mm.
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 coat. 

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.

Colours: 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.

Drying 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 a guide.  

It is essential that the membrane must not be damaged in any way including when applying subsequent coatings. Damp and cold surfaces will increase drying times.

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.

Storage: Store in a cool, dry area away from direct sun light. Ensure unused product is sealed properly. Keep out of reach of children.  

Clean Up: Wet spills must be promptly be cleaned up with water, but should be avoided as it is difficult to remove entirely from surfaces.  

Tiling, Topping or Top Coating: Primeseal MC can be directly tiled or topped.

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.


Waterproofing FAQ

Membrane Protection Board

Waterproofing Coating

Waterproof Drainage Sheet

Waterproofing Primer

Repair and Maintenance