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We Pride ourselves in using only the best Waterproofing Products available to ensure that you have the best Products and Workmanship on your roof. 

PolyPromt© Superior Waterproofing Product

We are proud to introduce our proven LIQUID PLASTIC called PolyPromt©

 Our Products and systems have been developed for the harsh South African Climate.

PolyPromt© is durable, flexible and a suitable for all types of surface applications

  • Tile Roofs

  • Corrugated Iron Roofs

  • IBR Iron Roofs

  • Concrete Roof and Balconies  

Respecting The Environment:

  • 100% Lead Free.

  • Dispose of excess product and containers in a responsible manner without harming the environment.

  • This product is manufactured under strict SABS ISO 9001 quality standards.


  • Very flexible: Can accommodate substrate movement.

  • Exceptional water resistance: Prevents water from penetrating.

  • Good UV resistance: Protects saturated membrane from UV degradation.

  • Waterbased: Easy to apply and clean up.

  • 100% lead free.

Intended Usages

  • Roof Ridging, Iron Roof Sheets and Concrete Slabs.

  • Over-coating saturated waterproofing membrane.

  • To be used in conjunction with PolyPromt© Waterproofing Saturation Coat.

Application Details

  • Mixing: Stir before use with a flat paddle to an even consistency. Stir occasionally during use.

  • Method: Roller, brush.

  • Cleaning: Remove as much of the product as possible from the application equipment before cleaning with tap water when wet.


  • Temperature between 5°C and 40°C.

  • Relative humidity of less than 85%, preferably between 10: 00 and 16: 00. Ideally apply when the temperature of the substrate is at least 2°C above dew point.

  • If possible away from direct sunlight.

Drying time:

4-6 hours at 23°C. 
Note:  Higher temperatures will accelerate the drying times (approximately halved for every 10°C increase), whilst lower temperatures will retard the drying time (approximately doubled for every 10°C decrease).

Recoating time: 3 hours if used to saturate the PolyPromt© Membrane. 1 hours as a topcoat over the saturated PolyPromt© Membrane at 23°C.

Requirements: Two coats when used on saturated waterproofing membranes. Three coats if used to saturate the PolyPromt© waterproofing membrane.

Surface Preparations
New galvanised iron:

  • Remove fabricators pre-treated oil and any other contamination with PolyPromt© General Purpose Cleaner/water mixture (1: 5) and abrasive pads to remove any oily layer or oxidation, rinse thoroughly with portable water and allow drying.

  • Ensure that a water break-free surface is obtained.

  • Apply 1 coat PolyPromt© Galvanised Iron Primer.

  • Weathered galvanised iron:

  • Loose rust and oxidation must be mechanically removed.

  • Clean with PolyPromt© General Purpose Cleaner/water mixture (1: 5) and abrasive pads to a water break-free surface.

  • Rinse well and allow drying before coating with 2 coats PolyPromt© Rust Primer.

Cement roof tiles:

  • 1 coat PolyPromt© Surface Restorer.

  • Cement plaster parapets:

  • Brush down with soft bristle broom.

  • Apply 1 coat PolyPromt© Plaster Primer.

Emulsion paint:

  • Clean and apply directly.

Gloss paint:

  • Abrade to matt finish, remove dust and then apply.

Aluminium paint:

  • Must be removed, and then treat as new work.

  • Surfaces must be clean and dry before painting.

  • Directly onto correctly prepared and primed surface.

  • Apply 1st coat of PolyPromt© Waterproofing Topcoat at 2 m² per litre. While still wet unroll the PloyPromt© Membrane on to the still wet Waterproofing Topcoat.

  • Use a minimum of 100mm brush loaded with more PolyPromt© Waterproofing Topcoat and dab the PolyPromt© Membrane until completely saturated with the Waterproofing Topcoat, allow drying for 24 hours.

  • Apply a 2nd and 3rd coat of PolyPromt© Waterproofing Topcoat without PolyPromt© Membrane with 6 hours drying between coats.

For maintaining a good sound waterproofing system:

  • Clean and apply 2 coats of PolyPromt© Waterproofing Topcoat without the use of PolyPromt© Membrane.

Waterproofing which is porous, loose and/or dry:

  • Remove all Waterproofing and treat as new.


  • Cannot be used where water ponding occurs.

  • Cannot be overcoated with non-flexible paints e.g. PolyPromt© Premium Matt.

  • Not for use in fish ponds.

  • Not recommended as a waterproofing for application to surfaces coated with Bituminous Aluminium Paint.

  • Cannot be applied to wet or damp surfaces or in conditions other than specified, or if rainfall or dew is imminent or to surfaces where the temperature is less than 10°C.

  • PolyPromt© Waterproofing Topcoat is not designed for the purpose of collecting rain water off painted roofs for drinking purposes. It is therefore essential for customers who collect rain water from painted roofs for drinking purposes to follow stringent guidelines. 


If the surface to be painted is asbestos then the preparation, cleaning and/or removal of broken asbestos sheeting needs to be done in compliance to the Asbestos Regulations, 2001 of the Occupational Health and Safety Act 1993. (ACT NO 85 of 1993).

Prompt Roofing 3 year guarantee
Prompt Roofing
Prompt Roofing
Prompt Roofing
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Prompt Roofing



Thermoflex has been in production since 1982 and has been developed specifically for South African conditions, which on the highveld are extreme. Assistance in product evaluation has been provided by the C.S.I.R.

Thermoflex consists of a 180 gram heat set chemically bonded (double reinforced) needle punched polyester geo fabric, manufactured in an ISO 9000 certified plant. This comprises the“ Carrier “ or core of the product. Impregnated into this is S.A.B.S. certified bitumen, which is modified with A.P.P. (attactic polypropylene) and various other components, which provide flexibility and ultra violet light resistance. The weathering surface is treated with an inert silica, which provides a key for adhesion of topcoats, should aesthetics require. The under surface comprises a heat sensitive polymer film which melts at the correct temperature during application.

Over three million square meters of THERMOFLEX has been specified and is successfully performing on roofs throughout Africa. The product is fully backed by our manufacturers guarantee and has a life expectancy of in excess of twenty years.

Full literature and reference to projects are provided in this brochure 


Waterproofing system

Product Background

Bitumen remains the most important base material for waterproofing today, this despite the fact that dozens of “miracle” new products have come on to the market. Bitumen is inexpensive, inherently waterproof, durable, has excellent adhesive properties and is non toxic. Examples of five thousand year old applications of bitumen exist in the middle east. No other system has this track record as a waterproofing agent. Unmodified bitumen has the disadvantage of being brittle at low temperatures and soft or liquid at high temperatures. Flexibility  and flow resistance over a temperature range of  zero to ninety five degree centigrade is a prerequisite for South African conditions.
In depth research and development over a nine year period has led to the development of THERMOFLEX A P. ( Atactic polypropylene ) modified torch-on membrane. Specifically developed for harsh African conditions THERMOFLEX A P offers the following.
Vastly improved elasticity capable of accommodating thermal movements of roofs. ( Particularly required with the increase in the use of thermally insulated roof decks. )
Improved flexibility at low temperatures, enabling laying in cold weather.
Improved strength, allowing a single ply application.
Improved resistance at application temperatures, to permanent deformation, puncture and tear. Giving good “walk on” properties during and after application.
Greater capacity to bridge movements of cracks and joints in the substrate and better fatigue resistance.

Why use a ready made Torch-On Membrane ?

Liquid applied waterproofing systems will always find applications. They do however have inherent disadvantages. Due to unevenness in substrates it is virtually impossible for the contractor to apply the product uniformly. Some areas will have product in excess of and others less than specification. Invariably those areas under applied will be weak and problems may occur.
Unscrupulous contractors may deliberately under apply product without necessarily changing the finished appearance of the roof.
A ready made membrane eliminates these pitfalls. THERMOFLEX  A P is a mechanically produced product of uniform thickness. 



Physical PropertiesColour


 Total Solids100%

 Specific Gravity1.3 – 1.4

 Water Vapor PermeabilityImpermeable

 Chemical Resistance

Resistant to mild acids
and alkali solutions.
Not resistant to hydro-carbon solvents, diesel

 Slump Resistance

Will not slump on a                    
vertical surface at 95 c


 Cold Flexibility(20mm mandrel)  < 5c°

 Elongation @ 25c>25%

 Tensile Strength>900 N/5cm

 Tear Resistance>300 N

ApplicationsConcrete Roof DecksSee application sheet 1

 Planters and Flower BoxesSee application sheet 2

 Under Screed or TilesSee application sheet 3

 Water Retaining StructuresSee application sheet 4

 Vehicular Traffic AreasSee application sheet 5


Thermoflex AP is a torch on APP modified bitumen Membrane, available in 3.5, 4.5, and 6 kg/m sq grades in 10m roll lengths 1m wide




The membrane  consists of a 10 micron LDPE plastic to prevent blocking the adhesive layer of modified bitumen a stabilized 180 gm  needle punch polyester carrier

A weathering layer of modified bitumen coated with silica to prevent blocking and supply a surface key for decorative finishing coatings.




Concrete roof decks normally consist of a slab screeded to a fall with a sand cement mixture. In the case of a new structure, a minimum of 2 rain free weeks drying period is required before waterproofing. In the case of an old roof, existing waterproofing should be removed and a drying period consistent with the amount of water absorbed allowed. As this is often difficult to estimate it is suggested that either our technical department is consulted or vent pipes ( 10 sq. m of roof area ) are provided to  prevent bubbling due to trapped water vapour.

Surface Preparation

All forms of surface contamination must be removed to ensure a clean smooth surface free of any loose material, or any other barrier to adhesion. Cracks or voids must be filled using HYPERCRETE  (modified cementitious material ) and allowed to cure for a least 24 hours. Should the parapets be rough a HYPERCRETE slurry should be applied to the area to receive the flashing. Fullbore covers should be removed to facilitate “dressing in” the waterproofing. It is recommended that the fullbores be checked to ensure they are functioning correctly.
Finally, an assessment should be made, as to what extent if any ponding is likely to occur. Standing water present, in excess of 5 mm is considered excessive. All low areas should be levelled with a topping of HYPERCRETE. Waterproofing over expansion joints should be laid on top of a PVC slip-sheet once the joint has been sealed. Under no circumstances should the waterproofing be laid directly over the expansion joint.


 Apply a thin uniform coating of THERMOFLEX PRIMER by means of a paint roller to the entire area including the parapets. Coverage will depend on the porosity of the substrate, but 6 sqm/ L of primer should be obtained. Allow a drying period of 3 hours. Lay up the entire roof area allowing 75 mm overlap on side joints 100 mm on end joints and at least 200 mm for turn-ups at the parapets. Joints can now be torched together and all edges sealed with a heated trowel.


It is recommended that the THERMOFLEX be turned up the parapets 150mm. A DARAFLEX flashing strip of 300mm should overlap the turn-up in such a manner that 100mm of its width be on the horizontal plane and 200mm on the vertical. (See DARAFLEX data sheet)

Finish coat   

A choice of REFLECT (Bitumenous Aluminium Paint) which is highly reflective or DARACRYL Acrylic (available in colours ) must be applied. If the acrylic topcoat is chosen, a pastel shade is recommended to improve reflection and reduce surface temperature.


Before applying REFLECT ensure that the product has been well stirred. The product should be applied with a paint roller at an application rate of 5 sqm/L. NOTE: The paint should be stirred at regular intervals to ensure a consistent appearance. The coating must not be applied under wet conditions or to a moist surface. REFLECT is a solvent based material, is highly flammable and should only be applied in a well ventilated area.
When applying DARACRYL to a very hot THERMOFLEX surface a mixture of one third paint to two thirds water should first be applied as a primer coat. Allow 30 minutes drying time before applying DARACRYL with a paint roller, at an application rate of 3sqm/L. DARACRYL only develops full water resistance after a few days. It is therefore essential that it is not exposed to excessive ponding during this period. 


This system is recommended for occasional light foot traffic. The products life expectancy can be significantly improved by re-coating the roof every 2-3 years.



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