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    Technical Reference

    Treatment Procedures.

    Step-by-step waterproofing, structural repair and rehabilitation methods, grouped by the chemistry they use, each mapped to the Armstrong products that carry it out. Select a treatment to view the full procedure and product recommendations.

    Treatment · Epoxy systems

    Epoxy Putty Crack & Joint Filling

    V-groove and U-groove filling in tanks, tile joints and grout holes

    Overhead water tank cracksSumps and drinking-water tanksBalcony and floor tile jointsGrout nozzle holesCracks before an epoxy floor
    1. Clean the surface of dirt, dust and other contaminants.
    2. Water tanks: cut a V-groove along each crack. Mix CONPROOF EP with cement into a putty and fill the groove flush. Then apply two coats of CONPROOF EP over the tank face, 3 to 4 hours apart.
    3. Tile joints: remove the old white cement and any contamination along the joints with a mechanical cutter, open them into U-grooves and blow them clean. Mix both parts of TILEX EPOXY STAIN FREE 100, pack the joints full and wipe off excess at once.
    4. Grout holes: after pressure grouting, cut off the nozzles and seal each hole flush with epoxy putty.
    5. Before an epoxy floor or screed, fill cracks and joints with epoxy putty so the coating does not telegraph them.

    Tanks must be emptied and dry on the surface before filling. CONPROOF EP is food-neutral, so it is safe inside drinking-water tanks. Moving joints are sealed with a sealant, not a rigid putty.

    Epoxy putty bonds hard into a cut groove and does not shrink, so the crack or joint is sealed solid. In tanks the same food-neutral epoxy is then used as the lining over it; in tiled floors the epoxy joint stops water getting under the tiles and stays stain-free.

    CONPROOF EP lining70 to 80 sq.ft per litre per coat; two coats
    Tile jointsOpened to a clean U-groove before filling
    Wide groovesUse ROOFCRETE EP over a ROOFBOND EP coat

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