epidermix 311

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A solvent-free underwater grade epoxy compound. Supplied as a component kit.

  • Lining inside of damp concrete pipes (standard epoxies will not adhere).
  • Underwater repair of ships’ hull coatings.
  • Lining up-stream of concrete dams to stop seepage.
  • Flooring – on wet floors – where dampness is a result of water applied on surface (not rising dampness), e.g. dairies, abattoirs and other environments.
  • Underwater grouting or patching. May be used as a grout with graded silica sand. Mixing ratio 3:1 by volume of sand and epoxy resin.
  • May be applied as a paint by roller or brush underwater.

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  • Serves as a paint (roller or brush)
  • Serves for grouting
  • Underwater working
  • Easy to work, gloss finish


All surfaces must be clean and sound. Also see our Technical data sheet “Preparation of Surfaces”.


Self bonding.


Thoroughly mix the contents of the two containers together before use. Should the kit be split, a mixing ratio 1:1 by WEIGHT ONLY must be used. If silica sand extended epidermix 311 is used as a grout, a mixing ratio 3:1 by volume of sand and epoxy resin is advised. In this application, the resin / activator blend should be transferred to a clean, dry container of suitable size, which has been thoroughly cleaned. Run the dry aggregate into the mixed resin and continue mixing until all the aggregate is wetted and a homogeneous mass is produced.

Mix ratio 1:1 by weight only
Density 1,055g/cm³
Clear straw yellow
Clear light yellow
Dilution Do not dilute
Consistency Mobile liquid
Shelf life 2 years from date of manufacture
Storage conditions Store under cover in cool conditions
Packaging 500ml and 5L kits.


Properties Unfilled Filled with 3.0 vol silica filler
Compressive strength @ 25ºC 56 MPa 68 MPa
Tensile strength split cube test @ 25ºC 10 MPa 8 MPa
Double lap shear strength 9 MPa (direct clamp) 5 MPa (2mm bond line)
Grouting test – 15 diameter embedment 12mm HT bars yielded and fractured in 19mm Ø. steel pipe 12mm HT bar pulled out of 25mm Ø. Pipe at 7MPa
Modified Arizon shear test 55 MPa prisms failed in concrete
Maximum service temperature Dry : 60º C
Wet : 40º C
Shrinkage during cure Negligible
Chemical resistance Excellent towards aqueous media. Good resistance toward dilute alkali and mineral acids
Solvent resistance Poor


Application by Brush, short fiber roller, trowel for mortars
Pot life 45 – 60 min/ 500ml
Volume solids 100%
Coverage (unfilled) 1l/m2 will yield a 1mm film thickness
Coverage (filled) 1L mixed epoxy liquid yields approximately 3L mortar
(when mixed 1:3 with a.b.e.® coarse no.1 silica sand)
Curing time @ 25ºC Touch dry:12 hrs
Practical cure: 24 hrs
Full cure : 7 days
Over-coating time @ 25ºC Minimum: 6 hours
maximum: 48 hours
Application temperature range 10ºC to 40ºC





epidermix 311 applies equally well underwater or above water. epidermix 311 bonds directly by displacing the water on a surface. epidermix 311 does not tend to emulsify or crawl when brush or rolled underwater, or on a damp surface. epidermix 311 hardens in 24 hours underwater at ambient of about 25°C. Good leveling, flow, gloss and flexibility is achieved.

NOTE: epidermix 311 must always be used in such a way as to prevent moisture ingress. It may not be used to seal dampness into a surface.


Clean equipment with abe® super brush cleaner, and then rinse with clean water.


Protect against UV if not permanently underwater. Most epoxies chalk and degrade in extensive sunlight.


Two-component, solvent free underwater grade epoxy liquid.

The underwater grade epoxy shall be epidermix 311, a two component, solvent free resin system applied in accordance with the manufacturer’s recommendations, a.b.e.® Construction Chemicals. 


Product safety information required for safe use is not included. Before handling, read product and safety data sheets and container labels for safe use, physical and health hazard information. The safety data sheet is available from your local a.b.e.® Construction Chemicals sales representative.


This data sheet is issued as a guide to the use of the product(s) concerned. Whilst a.b.e.® Construction Chemicals endeavours to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot – because a.b.e.® has no direct or continuous control over where and how a.b.e.® products are applied – accept any liability either directly or indirectly arising from the use of a.b.e.® products, whether or not in accordance with any advice, specification, recommendation or information given by the company.


Where other products are to be used in conjunction with this material, the relevant technical data sheets should be consulted to determine total requirements.

a.b.e.® Construction Chemicals has a wealth of technical and practical experience built up over years in the company’s pursuit of excellence in building and construction technology.