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Waterproof Balcony Exposed Liquid Rubber Membrane:  


The technology of Duram Multithane Jointing Compound comprises of two elements being the Multithane Std waterproofing membrane and a curative compound which allows the Multithane Std waterproofing membrane to fully cure in confined areas at significant thicknesses.

This data sheet should be read in conjunction with Multithane Std data sheet.

Duram Multithane Jointing Compound therefore has the advantages of a high performance waterproofing membrane in a pourable consistency with the through-cure of a two pack system.

Multithane Jointing Compound cures to form a tough, flexible, seamless jointing compound that bonds firmly to most substrates (preferably primed) and is capable of withstanding normal structural and thermal movement and hydrostatic pressure. 

Advantages & Benefits

Multithane Jointing Compound represents the highest standards in waterproofing technology and incorporates the following benefits:

  • Technology is based on a proven CSIRO accredited waterproofing membrane.
  • Fast Curing - usually within 24 hours.
  • Permanently flexible. (Flexibility +/-400%)
  • Suitable for permanent immersion in water.
  • High strength and puncture resistant.
  • Resistant to a wide range of pollutants, chemicals and detergents (excluding caustic and corrosive elements).
  • Almost odourless when cured.
  • Formulated for long-term waterproof protection.
  • Short-term UV exposure capability.
  • High hydrostatic pressure resistant.
  • Can be used without primer on suitable, low moisture content substrates. 



Multithane Jointing Compound is ideal to seal and waterproof:

  • Expansion joints
  • Joints
  • Large open cracks 


NB. This data sheet does not constitute a full specification as site conditions and requirements vary. Confirmation of suitability and specification should be sought from the Company regarding specific projects.


Multithane Jointing Compound is suitable for use on most sound and dry substrates, usually primed, including concrete, masonry, brick, cement render or cement topping, fibre-cement board, plaster board, timber and etch-primed metal. Substrates must be sound clean, and free of oil, grease, release agents, adhesion reducing contaminates, anti-rust treatments and loose or friable matter.  

Preparation Guide

Additional information is also contained in Duram’s General Preparation Guide.


  • Sound concrete, cement block-work, brick and masonry substrates generally require no priming.
  • However, it is preferable to prime and all doubtful surfaces should be primed.
  • Suitable primers are Duram Primeseal Duram Multiseal, Duram Superprime 711 or Duram Primeseal SP.
  • Primeseal & Multiseal: Apply at 4 m2 per litre and allow to cure.
  • Superprime 711 and Primeseal SP:
  • Apply at 8 m2 per litre and allow to cure.
  • Metal surface should be lightly abraided and metal etch primed with Duram ME Primer or Duram Primeseal.
  • Multithane should be applied to the primed surface as soon as possible after the primer is dry and within 24 hours. Beyond this period the cross-linking diminishes. If membrane is not applied within 48 hours the area should be re-primed.


Damp surface must be primed with Duram Primeseal. Freedom from surface water and continual dampness is essential.


Add the Multithane Jointing Compound Curative to the Multithane Std and thoroughly stir so that the curative is completely and uniformly mixed throughout the product. Avoid air entrapment. Poor mixing will result in poor and delayed curing and may negate or diminish the performance of the product.

Mix Ratio

Multithane Std Curative

  • 15 Litre pail 900 grams
  • 5 litre pail 300 grams
  • 1 litre can 60 grams



Insert a suitable backing rod and apply Multithane Jointing Compound by pouring as required. Avoid over filling the joint and allowance for the required space above the jointing compound must be allowed for when under compression.

Whilst joints can be fully filled to virtually any depth and width, the following should be considered:

  • For maximum elongation capability the depth of the Multithane Jointing Compound should approximate but not exceed half the width of the joint.
  • For non-porous substrates that do not provide optimum adhesion such as aluminium, stainless steel or other smooth surfaces the depth of the Multithane Jointing Compound should approximate but not exceed half the width of the joint.
  • Multiple layers of backing rod and Multithane Jointing Compound may be applied. 


Minimum Coverage

As a quide only, a 1000mm long x 10mm wide x 10mm high joint will required approximately 1 litre of liquid Multithane Jointing Compound before shrinkage.

Coverage is dependant upon type, porosity and of substrate and backing rods material.


Multithane Std: 5 and 15 litre cans.

Curative: 300 grms & 900 gms

Clean Up

Avoid spills, as removal is difficult.


Risk is considered low when properly used but it is important to observe precautions on the can and Material Safety Data Sheet.


Multithane Std is solvent based. The use of solvent resistant rubber gloves and goggles (against splashes) is recommended.

  • If swallowed do not induce vomiting, give plenty of water to drink. Seek urgent medical advice.
  • If in eyes, flush thoroughly with clean water.
  • If on skin, remove contaminated clothing and wash with soap and water.
  • If inhaled (unlikely due to its viscous nature), remove person to fresh air. Apply artificial respiration if required.
  • Product is flammable. Keep away from all sources of ignition.
  • Ensure that there is adequate ventilation. Vapours may collect in low-lying areas.
  • Technical Information
  • Cure Time 8 to 24 hours.
  • Elongation +/-500%.
  • Specific Gravity: +/- 1.16 to 1.20
  • Content Less VOC’s: +/- 82
  • Shore Hardness +/- 78
  • Water Absorption % 1.0 – 1.5
  • Tensile Strength +/- 2.0 Mpa
  • Service Temperature +/- (-20 to 100oC )
  • Hydrostatic Pressure
  • Resistance: >70 Kpa.
  • Appearance Coloured viscous liquid, usually grey.
  • Clean Up Duram Solvent to clean equipment.
  • Dilution Not recommended but Duram Solvent.
  • Flash Point: > 44oC.
  • Application Temp 10oC to 30oC (ambient)
  • Hydrostatic Pressure
  • Resistance > 2 kpa.


Shelf Life 6 months unopened.


The company’s liability in respect of this product is limited to the replacement of proven faulty product and is not responsible for any loss or damage arising from its use or any consequential damage whatsoever.


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