Pentens® E-501LN Tank Lining Epoxy is a 100% solids modified epoxy coating designed for high performance waterproofing, chemical resistance and traffic compatibility under a wide range of application and service conditions.
Pentens® E-501 LN features odorless application, "zero" VOC content, low viscosity and self-priming to concrete, steel, aluminum, ceramic tile*, plywood, natural stone, glass*, vinyl tile and many other substrates. (*Note: Some glassy surfaces require use of adhesion-promoting additives.) Clear or a wide range of colors is available.

Areas of application include:
-    Tank lining for sewage tank, waste treatment plant, water purification tank.
-    Industrial flooring underlayment.
-    Mechanical room flooring non-slip surfacing.


  • Non-toxic.
  • Odorless.
  • High adhesive strength.
  • Low viscosity.
  • Good penetration.
  • High mechanical and chemical resistance.
  • Short waiting times.

Surface Preparation
Surfaces to be coated must be clean and dry, and free of grease, oil, dirt and other contaminants. Old lining must be completely removed. If product will be applied over smooth surfaces, a test application should be performed to assure adhesion and compatibility. It is recommended that steel surface be sandblasted to bare metal. Concrete should be neutralized or acid-etched and washed thoroughly. Level off uneven surfaces using Pentens® EPTM epoxy putty & filler.

Thinning & Mixing
Pentens® E-501 LN is supplied as a low viscosity, two-component, 100% solids coating. For most applications, no thinning is required. In some cases thinning may be economically advantageous, to increase product spread rate. In other cases, slight solvent addition may improve the "bite" on a bard existing coating or may improve penetration of slightly oily surfaces. Thinning should be limited to the minimum required, typically about 5 - 10% solvent addition should be sufficient. Use only compatible solvents.
Mix ratio is nominally 2:1 resin to hardener by volume. Measure and mix consistently. Product is also available in pre-measured units, eliminating the need for field measuring of components. Mix thoroughly for at least two minutes, scraping the container bottom and sides to assure complete mixing. There is no induction or waiting time required after mixing before application.
The exothermic nature of epoxy setting reactions may cause rapid temperature rise when the mixture is left massed in a bucket, resulting in high temperatures and loss of utility of the product.
To maximize handling and working time, pour the mixture into shallow pans or dump and squeegee tile mixture out onto the surface to be coated within a few minutes of mixing.

Apply a primer coat by brush, roller, squeegee or plural component spray. Epoxy mixture thinned out with reducer using not more than 15% by volume.  Allow 2 to 3 hours drying time.
Apply saturating coats and allow for initial curing time of 6 to 8 hours. Grind surface to a smooth finish before application of topcoats. Clean tools and equipment immediately after use with Pentens® 501 or Xylene.

Solvents are hazardous materials. Read and observe guidelines on their manufacturers' Material Safety Data Sheets. Do not subject to immersion for at least 5 days after application, or discoloration may result.

Curing & Cleaning
The applied epoxy tank lining must be allowed to cure 72 hours before using the tank for storage of potable water. Seven (7) days curing time is necessary to attain chemical resistance. Wash the cured lining using detergents and rinse thoroughly.

PENTENS E-501LN will become yellowing when exposure to sunlight but it will be not influence the performance.


  • Impervious gloves and barrier cream should be used when handling these products.
  • Eye protection should be worn. In case of contact with eyes, wash thoroughly with plenty of water and seek medical advice if symptoms persist.
  • If contact with skin occurs, it must be removed before curing takes place.
  • Wash off with an industrial skin clearer followed by plenty of soap and water. Do not use solvent.
  • Ensure adequate ventilation when using these products.