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M400 (Component of JS Waterproofing Coating)
Product Name: M400 (Component of JS Waterproofing Coating)
Type: M400
Package: 50kg/drum

Liquid Applied Single Component Elastomeric Waterproofing Membrane

M400 Waterproofing Coating

  ■ Product Description

M400Waterproofing Coating isa water-based elastomeric coating, which utilizing the latest technology tosubject to resistant the severe weather condition, chemical eroding, etc. It isa white emulsion with single component system. It is a highly elastic toughwaterproofing system, co-polymers and a carrier solvent. It is highly resistantto aggressive soils and soluble salts providing an effective continuous barrierand protection against waterborne damage. This is ideally suited as avapour/salt barrier to building facades behind granite, marble, stone cladding,and curtain wall elements.

 ■ Standards Compliance

M400Waterproofing Coating withthe requirements of the following standards: ASTM D 412.

 ■ Typical Properties



Measured Value

Adhesive Strength, MPa



Tensile Strength, MPa



Breaking Elongation Rate, %



Water Impermeability

0.3MPa, 30min.


Low Flexible

-20 degree C, 2h


Temperature Resistance

80 degree C, curing for 3 days, no crack, no blistering, no fissure.


Freezing & Thawing Resistance Cycling

200 times of F&T cycling test at temperature in -20 ~ 20 degree C. no weight loss, no cement layer crack, no blister, no fissure.


Alkali Resistance

Dipped in the NaOH solution 500 hours, no crack, no dusting, no fissure.


Weather Resistance

500 hours, no blister, no fissure, dusting less than 1 grade.




M400Waterproofing Coatingis a single component high performance waterproofing membrane with highelasticity and low water permeability. M400 Waterproofing Coating isparticularly suitable for a wide range of applications including wet areas,foundations, basements, terraces, retaining walls, bridge abutments, planters,inverted roofs, and remedial repairs to felt, asphalt, concrete, fibrous cementor other roof structures when protected from exposure to direct sunlight.

TypicalApplications & Advantages

Can be applied to a range of substrates.

Excellent adhesion and thermal stability.

Outstanding resistance to oxidation and brittlement.

High elasticity, ensuring a permanently flexible barrier over a wide range oftemperatures.

High build properties ensure rapid application.

No requirements of joints.


Prepare JS waterproofing coating

Apply in roof, basement, washing room, reservoir, dam, swimming pool, channel, subway, complex waterproofing constructions, etc.

Prepare anti-corrosion mortar

Apply in anticorrosion layer, such as drainage, sewage pipe, etc.

Prepare repair mortar

Apply in repairing constructions, such as cement or concrete pipe-line maintaining; old constructions restoration; road and bridge mending.

Prepare sealing material

Apply in grouting or sealing constructions, such as concrete pavement crack grouting, wall crack grouting, etc.

Prepare exterior wall warm insulation adhesiveness and rubber cement plastering.

Apply in exterior wall warm insulation


 ■ Technical Support

MUHU providesa comprehensive technical support service to specifiers, end users, andcontractors and

is able tooffer on-site technical assistance.

 ■ Instructions for Use

SurfacePreparation: - Surfacesto which M400 Waterproofing Coating to be applied must be clean fromdirt, dust, rust, voids, honeycombs, protrusions, or any other material, whichmay impair adhesion.

Where mossor lichen is present, treat with proper fungicidal wash to kill spores andinhibit further growth. Following treatment, wash area thoroughly with cleanwater and allow drying. Fillets must be provided at corners or sharp anglesusing 4:1 sand and cement mortar modified with a good quality bonding agent.

Priming:Normally not required on goodquality, well-prepared substrates.

Cracks:All shrinkage and non-structuralcracks must be treated with not less than 1.5mm coating of

M400Waterproofing Coatingextending 75mm eitherside of the crack. Allow to cure overnight prior to general application.

Application:M400 Waterproofing Coatingshould be applied by brush to obtain a continuous unbroken film. Two coats arerequired with the second coat applied at right angles after the first coat hascured.

M400Waterproofing Coatingmust be protected from mechanical damage during subsequent construction orbackfilling works. Any damage may be repaired by spot application. If a waterflood test is to be run, the membrane should cure for a minimum of 10 days.Whilst M400 Waterproofing Coating is resistant to frost, adhesion willbe impaired if applied to frosted substrates. Application should be avoided ifsubstrate temperatures are below 5 ℃ or rain is imminent.

Cleaning:Application equipment should bethoroughly cleaned after use with Xylene or similar solvents. Spillages shouldbe absorbed with sand, vermiculite or similar and be disposed of in accordancewith local regulations.


 ■ Coverage

Coveragerates vary according to the density, porosity, texture, ambient temperature,etc. of the substrate to be treated. Typically, a coverage rate of1litre/m2/coat at 0.55mm D.F.T.

 ■ Packaging & Storage

 M400Waterproofing Coatingis packed in 50kg per drumand it has a minimum shelf life of 12 months provided it is stored under cover,out of direct sunlight.

 ■ Health & Safety Precautions

M400Waterproofing Coatingdoes not fall into the hazard classifications of current regulations. However,it should not be swallowed or allowed to be exposed to skin and eyes. Suitableprotective gloves and goggles should be worn. Splashes on the skin should beremoved with water. In case of contact with eyes rinse immediately with plentyof water and seek medical advice. If swallowed seek medical attentionimmediately – do not induce vomiting.

For furtherinformation, refer to the Material Safety Data Sheet available for this product. 

 Important note

MUHUendeavors to ensure that the technical information contained herein is true,accurate and represents our best knowledge and experience. No warranty is givenor implied, as MUHU has no control over the conditions of use and thecompetence of any labor involved in the application are beyond our control.

Asall MUHU technical data sheets are updated on a regular basis it is thecustomer’s responsibility to check that the product is suitable for the intendedapplication, and that the actual conditions of use are in accordance with thoserecommended.







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