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Product Data Sheet

InstaProof A80

Two component, Pure Polyurea Waterproofing Membrane


Duram InstaProof A80 is a two component,superior quality, 100% solids (solvent free), fast cure, spray applied, elastomeric, hybrid polyurea waterproofing membrane and protective coating.

Duram Instaproof A80 cures, within seconds to provide a tough, high tensile tear and abrasion strength, high elongation and puncture resistance and excellent  corrossion, wear and chemical resistance.

Duram InstaProof A80 forms an water impervious seamless waterproof membrane.

For contact with drinking water applications use InstaProof PB A80. 


Duram InstaProof A80 is suitable as a:

• Waterproofing membrane over most construction substrates.
• Abrasion resistant protective coating.
• Corrosion resistant protective coating.
• Chemical resistant coating.
• Protective coating in marine environments.
• Protective liner for landfill and waste materials
• Wear resistant coating / liner for mining operation.
• Protective truck, horse float, ute liner.
• Trafficable membrane for vehicle parking decks and bridges.
• Protective liner for cargo holds and boat liner.
• Sewerage tank liner.

Potable Water Applications
For contact with drinking water applications use InstaProof PB A80. 

Suitable Surfaces

Duram InstaProof A80 is suitable for use over suitably primed and prepared:
• Concrete and cementitious surfaces
• Timber
• Steel, aluminium, galvanised metal.
• Fibreglass resin coating

Additional Uses

Duram InstaProof A80 is an excellent waterproofing, abrasion resistant, chemical reistant, trafficable protective coating and therefore has numerous applications on to numerous substrates.

In all cases, an adhesion test is recommended prior to application.


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.


• As InstaProof A80 is a dual component, fast setting, spray appllied polyurea membrane coating, requiring appropriate skills in machine set-up, machine functionaility and spraying techniques and  it should only be used and applied by an experienced applicator.

• Do not apply if material and substrate temperatures are below 2ºC or 24ºC respectively or if the substrate temperature is greater than 50ºC. 

UV Resistance: Due to its aromatic composition, the product will discolour and yellow when subject to exposure to UV light. It is recomemnded to top coat the product with an aliphatic polyurethane top coat or other suitable coating which should be done with 6 hours of applying InstaProof A80. 

• Structural movement and crack development must be below the tolerances of the membrane coating or rupture may occur.

Benefits and Advantages

Duram InstaProof A80 is:
• Fast curing.
• 100% solids (solvent free)
• Flexible - Elongation ± 450%
• High Tensile strength
• Tough
• Seamless
• Abrasion, impact and tear resistant
• Suitable for potable water.
• Single coat application
• Rain resistant within 2 minutes.
• No VOC's

Precautions in Use

Do not spray in confined areas.
Wear suitable breathing respirators.
Gloves, boots and safety goggles or glasses should be worn. 

Mask off areas that are not to be coated.
Be weary of wind conditions to avoid over-spray.
Do not dilute the material. Viscosity can be controlled by the temperature of the material.
Regularly check the machine and equipment particulary the filters for build up of material.

Do not open until ready for use.

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.


All surface must be properly and suitably prepared. Problems are mainly attributable to poor surface preparation. Polyurea coatings rely on the soundness, structural entegrity and stability of the substrate to which they are applied.
As substrates vary from project to project and substrates may have differing  porosity, strength, tensile strength, movement, moisture content and water vapour transmissions. Therefore, preparation requirements may likewise vary and information should be sought from the Company.
All surfaces must be clean, dry, sound and free of dirt, dust, lose material, oil, grease, wax, contaminants, laitance, efflorescence, rust, salts and adhesion detracting substances.

The preparation detailed below should be considered as a minimum and the applicator should use their skill and expertise to carry out additional works that are required.


New Concrete
New concrete must be cured for at least 28 days. The moisture content of the concrete must less than 5%. Verify these aspects before preceeding.

Off-Form Concrete Including Insitu Concrete Tanks
• Water blast the walls and floor at 3500Psi with a needle rotary head to remove laitance and expose to open pores, voids, blow-holes, cavities and imperfection.
• Doubtful areas should be hammered with a ball-pin hammer to expose and open holes and imperfections.
• The surface should have a 50 micron profile.
• Bag or skim-coat the walls and/or floor with a structural fairing mortar to give a minium 32MPa tensile strength such as BASF Emaco Nanocrete FC.
• At the very least all blow-holes, voids, cavities and defects should be properly filled with a structural fairing mortar or epoxy resin modified patching & fairing compond.
• Allow to dry to a maximum moisture content of 5% before priming and applying the InstaProof A80 spray membrane.
• When detailing with a polyurethane joint sealant, allow it to fully cure for 24 hours so that no solvents are present in the sealant, else blistering or pinholing of the membrane may occur.

Masonry and Render
• Ensure that moisture content of the surface is a maximum of 5%.
• Test that the render is firmly bonded to the substrate.
• Patch, repair, skim the surface as detailed under Off-Form Concrete above.

Steel and Metal
• Clean the surface so that all traces of oil, grease, contaminants, rust, dust and loose material are removed.
• Remove mill scale from mild steel by abrasive blast cleaning. to Class 2.5 or approximately 50 micron surface profile.
• Clean galvanised steel by light wet abrasive blast or with phosphoric based cleaner.
• Solvent wipe (and allow to flash off) or water blast Colour Bonded Steel.
• All defects must be suitably repaired.

Up-Turns and Penetrations
• If the substrate is concrete then treat is detailed under Off-Form Concrete above.
• Apply a construction grade polyurethane sealant such as Duram Resiflex FC33 to all corners and tool off to form a 10mm to 15mm flexible fillet. It is important that the pu sealant is allowed to cure for 24 hours so that all traces of solvent have evapourated to avoid blistering or pin-holing of the membrane.

After preparing the surface, prime concrete with one or two coats of Duram Primeseal SP as per the data sheet at 7m² to 8m² per litre per coat. Highly porous or where water vapour transmissions are expected apply a second coat after 2 hours of applying the first priming coat. Do not apply the primer in thick coats.

Detailing Preparation

This must be read in conjunction with Priming and Detailing Section before proceeding.

• Concrete must be cured for at least 28 days.
• Surface defects such as spalling, concrete cancer, cracks must be suitably corrected. 
• Concrete surfaces must have a reasonable degree of porosity and  surface profile to allow adhesion.
• Shiny, mirror finish or helicopter finished concrete must be suitably abraded by grinding or shot blasting.
• Prime with one or two coats of Duram Primeseal SP, applied at 7m² per litre per coat, as per the product data sheet. The primed surface should NOT be a high gloss.
• Where water vapour transmission is expected apply two coats of Duarm Primeseal SP as per the product data sheet.
• Apply InstaProof A80 as soon as the primer is cured and best within 2 hours but must be within 6 hours.

Where Appropriate or necessary:
• Comply with Concrete Surface Preparation ICRI 03732 and 
• Standard for Cleaning Concrete: ASTM D4258.
• Standard for Abrading Concrete: ASTM D4259.
• Comply with Standard for Etching Concrete: D4260.
• Comply with Standard for Measuring Moisture Vapour Emissions: ASTM F1869

For metals, timber, aluminium, galvinised surfaces contact the Company.

Product Preparation Before Use
• Thoroughly stir part A (resin component) with mechinal stirrer.
• Circulate product through pump to mix through.

Moverment and Construction Joints
• Install suitable backing rod to appropriate depth.
• Fill joint with a suitable construction grade pu sealant or pourable Multithane Sealant to finish flush with the surface. Allow to fully cure.
• Lay a slip tape over the joint.
• Apply a minimum 1.5mm to 2.5mm thick coat of Duram InstaProof A80 across the joint extending 50mm on to each surface. Allow to cure for at least 4 hours, but preferably 24 hours.
• Apply a 1.5mm to 2.5mm thick coat of Duram InstaProof A80 to entire surface.
• Lay a layer of Abelflex over the joint (and cured InstaProof A80 membrane) extending at least 100mm either side of the joint prior to topping or covering.


Duram InstaProof A80 is formulated for application through a heated, plural component, high pressure airless spray machine capable of supplying material to the spray nozzle at a minimum of 2000 psi spray pressure and material temperature of 55ºC to 60ºC. Suitable spray machines include Gusmer H-3500 or Graco Topcoater using a Gusmer GX7-400 spray gun. For further information regarding the equipment contact the Company.

Mix Ratio
Parts A:B    1:1 (v/v)

Spray using a 50% overlap to ensure that the coating is evenly applied over the surface. Sparying should be continuous and avoid triggereing the gun. The applicator should be aware of even small changes in pressure as this may effect the product and if so, spraying should be suspended and the machine and other factors checked before continuing. Check filter regularly for material build up.

Apply the coating in a single coat in overlapping sweeps until the desired thickness is acheived. The coating may be built up to vertually any thickness. The minimum thickness for a waterproofing membrane is 1.5mm to 2.5mm. Usage should be project specific and confirmation should be sought from the Company.

Apply product to suitably prepared and primed surfaces (as detailed above) as soon as primer has fully cured taking approximately 2 hours and within six hours of Duram Primeseal SP primer being applied.

Application Temperatures
Material  (minimum)      24ºC       
Substrate (minimum)    2ºC and 3ºC above dew point        Maximum 50ºC

Other Considerations
• Humidity must be less than 85% RH.
• Ensure rain or other factors have not dampened the surface.
• Do not apply in rain or if rain is eminent.
• Where exposed, do not apply in windy conditions as there is a risk of over-spray.

Protection of Membrane
• Do not expose to water or dampness for at 24 hours after application.
• Allow product to cure for 24 hours before topping or exposing it to traffic.
• As with normal good practise, protect membrane from external damage.

Recoating of Older Coatings
Clean with high pressure water spray, Allow to dry.
Remove contaminates.
Abrade surface by lightly grinding to remove top film and oxidised material.
Re-apply the product.


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


The coating can be build up to any thickness, provided it is done in a single, continuous application in a sweeping overlapping technique.

Theorectical Coverage
1mm of thickness requires 1 kg applied to 1m².

Minimum Usage and Dry Film Thicknesses
As a waterproofing membrane:1.5 kgs to 2.5 kgs per 1m² (1.5mm to 2.5mm dry film thickness).
As a chemical or corrosion resistant coating: 2mm litres per 1m² (2mm thick).
As an abrasive resistant coating: 3mm litres per 1m² (3mm thick).


Natural: Cream colour plus colour pack (usually concrete grey).

Tinting: The product can be tinted to a variety of colours. For UV and colour resistance deeper colours are recommended.

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.


Tack free:                 30 to 90 seconds of spraying.
Full Cure:                  24 hours
Rain resistant:          2 minutes
Foot Trafficable:       2 to 4 hours
Vehicle Trafficable:   24 hours

Quality Control

The Applicator should:
• Retain a sprayed sample for each period of spraying for a given project and keep for duration of the warranty period.
• Conduct bond test to ensure proper adhesion of the membrane. If an inadeqaure bond strength has been acheived the membrane should be removed, surface suitably prepared and then the membrane re-applied.
• The Applicator should ensure that the correct dry film thickness has been acheived. If inadequate then additional product should be applied accordingly.


Store in dry, cool, ventilated area away from direct sunlight.
Storage Life: 6 months at recommended temperatures of 20ºC to 25ºC and minmum of 10ºC. Temperatures below 10ºC may result in cystallisation of the product requiring the product to be pre-heated before use. Protect from frost. 
Rotate drums periodically if stored for long periods.

Clean Up

The product cures very fast and is chemical and abrasion resistant making the clean up of spills very difficult requiring surface grinding.
Protect, cover or mask off areas that are not to be coated. Protect unwanted areas from application and over-spray.
Drums should be placed on plastic sheets so as to avoid product from contacting the substrate. 

Tiling, Topping or Top Coating

Not usually directly tiled.

Safety & Precautions

When spraying or using InstaProof A80, observe usual good industrial safety standards and hygiene.
The following safety equipment should be worn: Appropriate gloves, safety glasses, respirator, D-grade protection suit and boots.
Although the product does not contain volatile or flammable solvents , keep all sources of ignition away from uncured product.


For full safety data refer to the products Material Safety Data Sheet. Observe precautions as per label.

Tests and Technical Data

Hardness Shore A:    ± 80                                        or          45 to 50 Asker D
Elongation:                ± 450%
Tensile Strength         ASTM D 412-92   16.5 MPa    or      > 190 kgf / cm²
Tear Strength:           ATM D 624-86      50N/mm      or     > 95 kgf / cm²
Abrasion resistance:  ASTM C501-84 H18 wheel    50 mg
Water potibility           Passes requirements at 7500mm² per litre exposure.
Service Temperature: Up to 120ºC shows no significant loss of tensile strength and elongation after 3 days continious exposure.


Issued: 1st July 2012 | Valid to: 30th June 2020

Conditions of Use and Disclaimer

The information contained in this Material Data Sheet is given in good faith based upon our current knowledge and does not imply warranty, express or implied. The information is provided and the product is sold on the basis that the product is used for its intended purpose and is used in a proper workmanlike manner in accordance with the instructions of the Product Data Sheet in suitable and safe working conditions. Under no circumstances will the Company be liable for loss, consequential or otherwise, arising from the use of the product.


DURAM PTY LTD ABN 50 612 836 718
The Ultimate in Waterproofing & Protective Coating Technology

Duram Offices:
NEW SOUTH WALES: 51 Prince William Drive, Seven Hills, NSW 2147

 Tel (02) 9624 4077  Fax: (02) 9624 4079

QUEENSLAND: Unit 4, 29 Collinsvale St Rocklea, QLD 4106

Tel (07) 3255 6478  Fax: (07) 3255 6258