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Roof Shield

Heavy Duty Reinforced Acrylic Waterproofing Coating for Terrace

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Dubond's Roof Shield is a heavy duty terrace waterproofing system, composed of specially developed highly elastic & resilient acrylic polymers, properly selected & graded fillers, lightfast & weather durable pigments, micro-fibres, additives & best quality fungicidal in water medium. it is used as a liquid applied waterproofing membrane for all types of building terraces. Dubond's Roof Shield is a three-layer system with coats in different colours ensuring proper build-up of the thickness, making it a reliable waterproofing system.

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Areas of Application

Building Roofs / Terraces – Flat & Slope

Over existing cementitious waterproofing treatments like brick-bat coba, Concrete Screeds, Acrylic Coatings, etc.

Features and Benefits

Water proofing – Tough & elastic films provides excellent W/p

Film thickness – Provides higher dry film thickness of 1 to 1.25 mm in three coat application

Crack bridging – Bridges cracks upto 2 mm width

Application Advantage – No need to remove existing BB coba, plaster, concrete surface

Strength - Higher tensile strength, tear resistance & bond strength with cementitious substrates

Resilience – Forms highly elastic & resilient coating so helps to withstand the structural movements

Durability – Resistant to uv & weather conditions

Abrasion Resistant – No additional protective coating is required for roof subjected to foot traffic

Ease of Application – Can by applied by brush & roller easily

Light Weight – Does not add extra weight over the roof

Non-toxic – Eco friendly

Breathability – It is Breathable

Method of Application

Surface Preparation

  • Prepare the surface thoroughly by cleaning, washing and removing dust, dirt, oil, grease and loose particles. Ensure that the roof slope is a minimum of 1 in 100
  • In existing old terraces such as brick-bat-coba or screeds, the substrate must be checked for its soundness. Damaged or hollow portions, sharp edges, etc. must be cut and repaired with a polymer-modified screed. Surface cracks must be filled with Dubond's acrylic crack filler
  • Bitumen based waterproofing treatments must be completely removed by mechanical scarification or by any other effective mechanical means


  • Apply one coat of Dubond's Hydro Prime without any dilution at the rate of 10-12 m per litre. allow it to dry for 2-3 hours
  • Apply the first coat of Dubond's Roof shield at the rate of 2 m per litre and allow it to dry before taking up the second and third coats,the rate of application being the same
  • The sequence of colours viz-a-viz, green or terracota grey can be decided depending on the desired top coat colour
  • In case only two colours are being used, ensure that the colour of the first and the third coat are the same. this would ensure correct consumption of material that will deliver a total Dft of 1 mm
  • Drying time between coats will be 6 to 8 hours
  • Ensure that the primer and the 3 coats of Dubond's Roof Shield totally achieve a minimum thickness of 1 mm Dft. allow the system to air cure for 7 days minimum

Technical Information

Solid Content % ASTM 69
Polymer Content % ASTM 35
Hardness (Shore A) ASTM D 2240 : 2002 80
Tensile Strenght, N/mm2 ASTM D 412 : 2002 2.6
Elongation at Break % ASTM D 412 : 2002 200
UV Resistant - Accelerated ASTM G 154 : 2000 Excellent : No thermal degradation
Weathering (1000 hours)   Cracking, chalking and discoloration
Adhesion Strength, N/mm2 ASTM D 4541 : 2002 0.9
Water Vapour Transmission ASTM D 96 : 2000 19 g / m2/ day
Algae & Fungus Resistant SS 345 : 1998 No Algae & Fungus growth
Crack Bridging ASTM C 836 - 1995 a.) No cracks upto 2 mm width
b.)  No cracks upto 1 mm (10 cycles)
Rapid chloride permeability ASTM C 1202 : 97 Very low
Water permeability (Depth of penetration at 5 bar pressure) BSEN 12390 Part 8 : 2000 6
Reduction in water penetration   68%

Other Information

Precautions & Limitations

  • All corners, gaps, joints, protrusions & outlets shall be coated with two extra coats
  • Do not apply during rains; substrate Must be in SSD condition for application of primer. the product is designed only for foot traffic and not vehicular or movement of machinery or equipments

Note : To achieve the full proof waterproofing, parapet walls must be covered with Dubond’s Rainshield


2 m2 per litre per coat.


4 ltr & 20 ltr.

Shelf Life & Storagee

Shelf life is 12 months from the date of manufacturing in unopened condition. Store in cool & dry place.

Health & Safety Precautions

Skin contact Wash skin with soap & water. Remove contaminated clothes.

On eye contact Immediately splash eyes with plenty of water. Consult Physician if irritation persists.

Ingestion Do not induce vomiting. Never give anything by mouth to an unconscious person. Call a Physician.

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