Chemistik PU-50 has been specially developed from latest PU technology to provide heavy duty waterproofing with long term durability. It is a two component coating ideally suited for concrete waterproofing of new and remedial work which is not directly exposed.


  • High Build Coating hence longer durability.
  • Crack bridging properties up to 3-5 mm.
  • Can be applied on damp surface.
  • Good for horizontal or vertical surfaces.
  • Easy to use quick setting.
  • Very strong bond with concrete/metals.
  • Can withstand temperature variations.
  • Will not crack or peel.


Suitable for all types of new and maintenance works. Highly recommended for waterproofing on concrete, like sunken slabs in bathrooms, kitchens, flat pu-50_2sloping roofs not exposed as a sandwich coat. All types of underground structures like basements, subways, channels, bridge foundations, tunnels aqueducts etc. Also recommended for protection of concrete in tanks used for storage of wastes and effluence like sewage, seawater, molasses, effluence containing acids or alkalis, cooling towers and all types of unexposed metal structures in heavy Industries like Chemicals, Steel , Power etc.


Clean all foreign matter such as dirt, dust, grease, laitance, mortar dropping, loose and flaking materials. Algae and fungus must be removed using suitable fungicide solution or bleach or dilute HCL solution, thereafter wash and rinse thoroughly. Necessary repairs to defects must be carried our prior to coating like crazed, unstable or hollow surfaces, major cracks, any protrusions, outlets, construction joints etc. For cracks and joints, use our Chemistik Crackseal Caulking Compound. All surfaces to be treated must be properly prepared, sound clean, dry and fully cured and ready. New concrete to be cured thoroughly for 28 days prior to coating. Ambient temperatures shall not be below 5ºC and more than 45ºC. Avoid working during afternoons when temperature is maximum. Do not apply during inclement weather or when rain appears imminent. For coating on metals, please consult our engineers for preparation of surface and suitable primer to be applied.


No primer required unless otherwise recommended for areas which cannot be prepared. Mix thoroughly the Resin and Hardener as supplied before use. Improper mixing will result in systems failure. Due to limited pot life of 20-30 mins, mix enough quantities that can be used within that period. PU 50 can be applied by brush or roller or airless spray equipment. Apply first coat on prepared surface. Apply second coat within 6-8 hours at right angle to the first coat. Inter coating interval should not be more than 10-12 hours.
Finishing PU-50 should simultaneously be applied to all openings, protrusions, outlets, parapet walls, copings, gutter valleys and expansion joints, forming a good seamless watertight finish. Treated surface should be allowed to cure for minimum 72 hours at ambient temperatures of 30º C cooler temperatures the cure time will increase accordingly.


It is recommended to use protective gear whilst working like gloves, goggles etc. All tools equipment etc to clean with solvent like Xylene Toluene etc.


Store in cool dry place away from direct sunlight. Shelf life 12 months in Original Containers.


Use mixed materials within 20-30 mins work in wellventilated areas and do not smoke during application. Keep away open flames, lights etc. Do not work when humidity is very high and temperatures should not be less than 5°C and more than 45°C. Avoid working during afternoons when temperatures are maximum. Do not apply during inclement weather or when rain appears imminent.


28 Kgs. (Part A – 8 Kgs. & Part B – 20 Kgs. Pails)

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