High-Build Thixotropic epoxy adhesive/grout and patching compound
Two-component, solvent-free, polyamide cured epoxy.
As an adhesive / grout to join metal or cementitious water main pipe sections. Effect repairs to damaged cementitious lining of water main pipes.
Permanent, easy grouting and repairing.
All surfaces that epidermix® 338 HBT will come into contact with, must be clean, sound and dry. Concrete must be free of laitance, dust, fractured aggregate, oil, grease and foreign matter. Abrasive blasting followed by dusting, will provide a sound surface.
Steel must be free of oil, grease, old paint, other foreign matter, millscale and rust. For maximum adhesion surface should be abrasive blast cleaned. Treat before steel starts to rust. Any lower standard of treatment will produce correspondingly lowered performance of the treatment.
epidermix® 338 HBT components are heavy pastes and should be mixed in manageable amounts to ensure homogeneity once mixed. Uniformity in colour is an indication of homogeneity. Set up prescribed volumes of base and activator side by side on a clean board. Mix together by trowel or paint scraper until a streak-free, grey material results. Mixing should be continued for another 5 minutes.
Properties of Wet Material
|Mixing ratio||1:1 by volume|
|Colour||Base: Light grey Activator: Black Mixed: Grey|
|Flash point||120 ºC|
|Dilution||Do not dilute|
|Consistency||Each component is a heavy paste|
|Toxicity||Uncured material is toxic|
Properties During Application
|Application by||Trowel or putty knife|
|Pot life||90 – 130 min/500 ml|
|Volume solids||100 %|
|Theoretical coverage||1 litre/m2 at 1mm film thickness|
|Maximum recommended thickness per layer||No slump on a drawdown 20 mm thick by 50mm wide. Held verticlly or suspended horizontally|
|Curing time @ 25 ºC||Touch dry – 6 hours Practical cure – 12 hours Full cure – 7 days|
|Overcoating time @ 25 ºC||Minimum 8 hrs Maximum 24 hrs|
|Application temp||10 ºC to 40 ºC|
Properties of Cured Material
|Maximum service temperature||Dry – 70 ºC Immersion -70 ºC|
|Shrinkage during cure||Negligible|
|Fire resistance||Non flammable|
Chemical Properties of Cured Material
|Tainting||Will not taint water|
|Chemical resistance: Initially||Not affected by the sterilization of the water main 4 hours after completion of the application|
|Chemical resistance Long term||Excellent resistance to water treatment chemicals at the concentration levels used for potable water|
Note: Sterilization is achieved by filling the pipeline with clean water having a chlorine residual of 50 mg/l and allowing it to stand for approximately 2 hours
Bonding / Priming
It is necessary to calculate specific demand from available dimensions.
Joining of pipe segments:
The epoxy filler is applied to the entire edge of concrete lining of the female section of the pipe, ensure good contact by means of adequate tooling. Male and female connection is made. For steel pipes, it is recommended that tack welding of the pipe sections is not carried out until the epoxy has partially set (4 – 6 hours).
Full seam welding, prior to initial setting of the epoxy, may result in sagging in overhead areas, because of heat transfer and consequent ‘liquifying’ of uncured epoxy at high temperatures.
Uncured excess epidermix® 338 HBT is removed and tooled internally by means of a pig. epidermix® 338 HBT, therefore, also provides continuity to the cementitious lining. A squeegee type pig will produce a clean cut surface and effect less drag/ disruption of uncured epoxy.
Note: All pipe joints that are not manually checked and manually tooled after pigging i.e. small bore (<450 cm id), must receive an application of epoxy to both male and female sections that are to be jointed. This will ensure more efficient wetting out of the joints and will result in a wet-on-wet contact which will result in more successful joints compared to a wet-on-dry contact. This will also aid in resisting slump, since the bead will be adhering to two faces rather than one.
Cementitious lining repair:
Mixed epidermix® 338 HBT should be pressed into place in the repair area, using a small amount first to wet out the surface and then building up the required thickness. The consistency of epidermix® 338 HBT is sufficient to hold its place in soffit repairs and on vertical faces. If the volume is too big to repair in one placing, leave the contact surface rough to act as a key for a subsequent placing, once the first one has set.
A final smooth finish may be obtained by trowelling off the surface of the still uncured epidermix® 338 HBT with a water dampened steel trowel.
Tools, brushes and mixing equipment should be cleaned immediately after use and before material has set with abe® super brush cleaner followed by washing with soap and water.
Protection on Completion
Against traffic and spillage until cured.
Two component, high build thixotropic epoxy adhesive, grout and patching compound for repairing and jointing cement lined steel water pipes and water mains.
The adhesive/grout/repair mortar shall be epidermix® 338, a two component, high build thixotropic, polyamide cured, epoxy compound applied in accordance with the recommendations of a.b.e.® Construction Chemicals. The mortar shall be suitable for use in potable water applications and be resistant to water treatment chemicals.
epidermix® 338 is supplied in 20 litre kits.
Handling & Storage
This product has a shelf life of 24 months if kept in a dry cool place in the original packaging. In more extreme conditions this period might be shortened.
Health & Safety
Wet epidermix® 338 HBT is toxic and flammable. Always ventilate the working area well during application and drying. Avoid flames in vicinity. Always wear gloves and eye protection when working with the material and avoid excessive inhalation and skin contact as well as smoking or eating while working with the compound. If material is splashed in the eye, wash with copious quantities of clean water and seek medical attention.
Cured epidermix® 338 HBT is inert and harmless.
This data sheet is issued as a guide to the use of the product(s) concerned. Whilst a.b.e.® endeavours to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot accept any liability for application – because a.b.e.® has no direct or continuous control over where and how a.b.e.® products are applied.
Where other products are to be used in conjunction with this material, the relevant technical data sheets should be consulted to determine total
a.b.e.® has a wealth of technical and practical experience built up over the years in the company’s pursuit of excellence in building and construction