Pentens® T-305TH is a cement based waterproofing coating incorporates 2 polymer components. Apply directly to concrete and mortar to prevent water infiltration.

Pentens® T-305TH can be used for positive and negative side waterproofing, sealing of hair line cracks and as a protective coating against aggressive chemicals such as carbon dioxide (eg. in concrete repair work), frost and de-icing agents. 

Areas of application include: 

Potable water tanks, Terraces and balconies, RC gutters, Bathroom floors and walls, Basements, Retaining walls, Seawalls.




  • Pre-batched and ready for used 
  • Mixes and applies easily 
  • Highly workability 
  • Good adhesion to sound substrates 
  • Impermeable 
  • Increased frost and salt resistance 
  • Resist carbon dioxide penetration 
  • Non-toxic 
  • Slightly flexible 

Surface Preparation
Surfaces must be clean, free from grease, oil and loosely adhering particles. All surfaces must be as flat and level as possible.

Absorbent surfaces have to be thoroughly saturated with water prior to application of first coat of Pentens T-305TH. However, no loose standing water should be on the surface before application.

Under normal circumstances, when the full quantities of both components are mixed together, a consistent mortar will result. Mixing shall be carried out in a clean container by gradually adding the powder component to the liquid component and stirring with slow speed mixer. Use mixture within 30 minutes. 1 set of Pentens T-305TH can be added less than 1kg of water for smooth application.

Dilute 1 portion of Pentens T-007 permeable primer or 1 portion of Pentens T-305TH with 3 portions of clean water and then plaster directly to the surface to be waterproofed, in order to improve the bonding.

Apply or plaster first and finish coat Pentens T-305TH to construction surface by using brush, roller of spray method. The time interval between coats shall be 4 – 8 hours, and make sure that the first layer of plastering has been dried and formed as membrane.

  • Bathrooms, terraces and balconies: 2.0kg/m2 2 coats.
  • For waterproofing coating up to 1m water head: 3.0kg/m2 3 coats.
  • For waterproofing coating more than 1m water head: 4.0kg/m2 4 coats
  • Pentens T-305TH must be applied in minimum 2 coats.
  • More coats may be required in areas of extremely high infiltration.

Over coating
After the primer, Pentens T-305TH can be applying directly provided with areas exposed hot drying winds. For indoor areas, it is recommended that allow approximately 30 minutes after the primer.

For over coating with cementitious materials, allow the second coat to harden for at least 1 day prior to over coating.

For more details, please refer to our Technical Department.

For optimum performance, Pentens T-305TH should be allowed to cure for 24 hours before the finishing concrete, tiles etc and during this time precautions must be taken in order to prevent damaging to the coating.

Tools and equipment just can be clean with clean water immediately, after use. Hardener material can only be mechanically removed.

As cement is alkaline and may cause irritation, applicators are recommended to wear gloves and goggles when using Pentens T-305TH . In case contact with eyes, flush immediately with clean water and seek medical assistance if symptoms persist.