COLD APPLIED LIQUID WATERPROOFING

WPMS-41C

High solids protective coating and curing membrane based on emulsified bitumen

WPMS-41C is a water based bitumen emulsion. It is dark brown in colour and dries to

a black flexible protective coating which also acts as a curing compound. The finished film

is tough and waterproof and forms a barrier to water and vapour transmission.

Typical applications

• General waterproofing and damp proofing of concrete, asbestos cement, roofing felt, 

  Slate tiles, wood, etc.

• Metal protection: provides protection for structural steelwork, pipes, etc.

• Insulation: provides a vapour barrier for cold storage rooms, etc.

• Protection to a variety of buried structures such as concrete foundations and retaining walls.

• As a curing compound onto green concrete.

• As a primer for most bitumen membranes.

Advantages

• Chemical resistance.

• Versatile.

• Economical

• Easy to apply.

• Cold applied.

Typical properties

Properties listed are only for guidance and are not a guarantee of performance

Flashpoint                            : Non flammable

Specific gravity                     : 1.00 @ 25°C

Application temperature    :  5°C to 50°C

Service temperature          : -10°C to 85°C (depending on operating conditions)

Chemical resistance         : Excellent to water, dilute acids, alkalis, chloride and sulphate ions

Flexibility                               : Provides a firm flexible coating

Composition

A blend of selected asphalts and bitumens emulsified in water.

Standards

ACI 515 IR-79. Guide to use of waterproofing, damp proofing, protecting and decorative barrier systems for concrete. Chapter 2 Section 2.1.1, 2.1.2., 2.1.3.

ASTM C309.

Packaging

WPMS-41C is available in 200 litre drums.

WPMS-42

A bitumen / rubber latex emulsion. Surface applied, flexible, damp and vapour-proof liquid

membrane.

WPMS-42 is a brown rubber/bitumen liquid emulsion with excellent adhesion which dries to a tough black seamless, flexible waterproof and vapour-proof membrane.

Primary uses

• Tanking and waterproofing structures: to provide an impervious waterproof membrane on concrete

  and brick.

• Floors: to provide a sandwich membrane in new construction or a surface treatment.

• Walls: for interior and exterior walls.

• Roofs: for the maintenance of many types of roofs including built-up felt, asphalt, lead, zinc,

  aluminium, concrete, lightweight screeds, timber, slate, asbestos cement, corrugated iron, and

  as a vapour barrier.

• As an adhesive: for bonding wood blocks and wood mosaics, insulation board, expanded

  polystyrene and cork tiles and to provide a key for plastering.

Composition

WPMS-42 is a thixotropic cold applied bitumen emulsion with added rubber latex.

Packaging

WPMS-42 is supplied in 200 litre containers.

Standards

• The Building Regulations 1972.

• BS 8102 - Protection of structures against water from ground.

• DOE 23 - Damp proof courses.

• DOE 77 - Adhesives used in buildings.

• BRE Digest 54 - Damp proofing solid floors.

Typical properties

Properties listed are only for guidance and are not a guarantee of performance

Colour                                   : Dark brown

Specific gravity                     : 1.01 at 25°C

Coverage                              : 1 - 4.5m² / litre

Flashpoint                             : Non flammable

Service temperature            : -30°C to +100°C

Dry film thickness                : 1.16mm at 2litre / m²

Application temperature     : +5°C to 55°C

Rubber content                     : 10% in the dried film

Application procedure

WPMS-42 may be applied by brush or squeegee. All surfaces to which WPMS-42 is applied must be sound, stable with an even finish and free from dirt, dust, loose debris, grease etc. It may be applied to damp but not waterlogged surfaces. Hot, very dry or porous surfaces should be dampened with a priming coat before WPMS-42 is applied. Where subsequent coats are to be applied, the first coat must be dry.

Below ground protection:

WPMS-42 may be applied to green concrete immediately after shuttering has been removed. Blind the first coat with clean sharp sand to afford higher dry film thickness and aid monitoring layer applications.

Sandwich membrane:

Two coats to be applied at right angles to give a D.F.T. of 770 microns in accordance with BS 8102. Blind second coat with clean sharp sand to provide a mechanical key for top screed (minimum thickness 50mm)