Quantity: In Stock

Category: Adhesives & High Strength Glues

Quick Overview:

Epigen 503 is a two component solventless epoxy which, when mixed, solidifies at ambient temperature to form a strong, tough material, possessing good mechanical properties and adhering strongly to suitably treated metal, timber and concrete surfaces.
It has been specifically designed to allow curing to take place unimpeded by the presence of water and Epigen 503 can therefore be used for underwater repairs and applications where dampness is present or the item being treated is subject to immersion prior to the Epigen 503 being cured.
Typical applications are the underwater patching of boat hulls, tanks, pipelines, and the repair or patching of tanks and concrete structures subject to immersion within a short time of application. Tidal zone repairs to steel and concrete wharf piles are also satisfactorily carried out using Epigen 503.

  • Repairs to swimming pools including rebonding tiles
  • Fairing fibreglass and bonding fabrications
  • Pile Repairs
  • Corrosion resistant cladding on marine hulls
  • Grouting slipway rails
  • Concrete crack and void repair

  • Resistant to a variety of chemicals
  • Cures underwater - salt or fresh
  • Non sag putty viscosity for versatility
  • Free of all solvents - zero VOC
  • Tough and durable
  • Versatility in application allows concrete patching
  • Suitable on steel surfaces
  • Strongly adhesive for optimum adhesion

Colour Off White  
Ratio by weight 1 kg Component “A”
  0.5 kg Component “B”
Pot Life minutes @ 24oC 30  
Mixed consistency @ 24oC Paste   
Specific gravity when mixed 1.4  


Compressive strength ASTM D695, Mpa 82
Tensile strength ASTM D638, Mpa 22
Flexural strength ASTM D790, Mpa 32
Hardness, Shore D >85
Elongation ASTM D638, % 1.3
Tensile Adhesion ASTM 4541, MPa >12
Thermal conductivity ASTM C177, Kcal/m.hroC 0.6
Coeff of Therm Exp ASTM C531, 10-5/C 1.9
Maximum exposure temperature, C 115
Heat deflection temperature ASTM D648, C 75
Thin Film Gel @ 12mm, Minutes 60
Thin Film Set @ 12mm, Minutes 120
Ultimate cure time, Hours 96


Methods for surface preparation prior to use include high pressure water blasting, or mechanical techniques such as abrasive blasting, grinding or scarifying.m
Specialist advice is available from Peerless Industrial Systems to ensure the correct preparation procedure is employed for specific application.


Mixing of product should be carried out using spatula or by slow speed blender, and completed by adding to the component “A”, component “B”. Ensure the mixed 0503 is homogenous and the final colour shall be even without streaks.When applying underwater, smear the 0503 across all surfaces to displace water.


Depending on the situation, the depth should nominally be 2mm as minimum to ensure sufficent coverage is in place and afford reasonable mechanical strength. There is no maximum thickness reqirement. No primer is required to facilite adhesion unless the surface is loose or friable. In cool environments, pre warm the product before use.

Adhesive Applications:

Apply a thin coat of Epigen 0503 to both surfaces before bring the two together. Do not use where a flexible or resilient glue line is required. Recommended where a tough and strong, or heavy shock resistant material is required. Preheat the material before use to achieve best cure rate and strength when cold.

Crack & Cevice Repairs:

Open up cracks using a grinder to allow proper identifica- tion of imperfection before applying directly into crevice or crack.
Tested at 21oC. Samples cured for 10 days at 25oC. Curing at elevated temperatures will improve chemical resistance.
1 = Continuous or long term immersion
2 = Short term immersion
3 = Splash and spills
4 = Avoid Contact 

Acetic Acid, 10 % 2 Acetone 2
Acetic Acid, Glacial 2 Ammonium Chloride 1
Hydrochloric Acid, 5 % 1 Beer 1
Hydrochloric Acid, 10 % 2 Dichloromethane 4
Hydrochloric Acid, conc 2 Diesel Fuel 1
Nitric Acid, 5 % 2 Isopropyl Alcohol 2
Nitric Acid, 10 % 2 Kerosene 1
Phosphoric Acid, 5 % 1 Petrol 2
Phosphoric Acid, 20 % 2 Salt Water 1
Sulfuric Acid, 5 % 3 Sewage 2
Sulfuric Acid, 20 % 3 Skydrol 2
Ammonium Hydroxide,
5 %
1 Sodium Cyanide 1
Ammonium Hydroxide,
20 %
1 Sodium Hypochlorite 2
Potassium Hydroxide, 5 % 1 Toluene 2
Potassium Hydroxide,
20 %
1 Trichloroethane 3
Sodium Hydroxide, 5 % 1 Wine 2
Sodium Hydroxide, 20 % 1 Xylene 2


Variations in cure may arise due to the amount of material being applied, the thickness of material being applied, the surface temperature, and the product temperature. The cure may be increased by heating product or by leaving mixed material stand for 15 minutes before use. The cure may be decreased by cooling the product before mixing.

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