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Sika-1 PK
Sikalastic-510 PK
Sikalite-101 PK
SikaSeal-105 PK
SikaTop-107 Seal PK

SikaCeram-600 Tile Grout PK
SikaCeram-850 Design
Tile Leveler Wedges
Tile Levelling Clip
Tile Spacer

Sika AnchorFix
SikaCeram-103 PK (White)
SikaCeram-205 PK
SikaCeram-90 PK

Sikacryl-110
Sikaflex Construction
Sikaflex-221

Sika Bond DV PK
Sikament-512 PK

Repair Products

Sika MultiSeal BT
Sika SBR-200 PK
Sikadur-20 Crack Seal
Sikadur-31 CF Slow
SikaGrout-114 PK
SikaLatex PK
SikaWall-720 E

SikaCeram 850/855 Tool Kit
SikaCeram-850 Gun

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Solutions

Fix the problem, not just the symptom

Pick your problem for the cause, a step-by-step fix and the exact Sika products to use.

Roof leakage
Roof leakage solution: how to waterproof a leaking roof
To stop a leaking flat concrete roof, clean and repair the surface, seal cracks and joints, then apply a waterproof coating over the whole roof. For an exposed roof, a ready-to-use acrylic membrane such as Sikalastic-510 (primer plus 2–3 coats at about 0.5 kg/m² per coat, reinforced with Sika Fab-1 mesh at cracks and corners) is the simplest DIY fix. Where the roof will be covered with tiles or a screed, a cementitious slurry such as SikaSeal-105 or SikaTop-107 Seal goes underneath.
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Wall seepage & dampness
Wall seepage and dampness treatment (seelan ka ilaj)
Wall seepage (seelan) is stopped by removing the damaged plaster, applying a cementitious waterproofing slurry to the wall, and re-plastering with a waterproofed mortar. Strip the plaster about 0.5–1 m above the visible damp line, apply two coats of SikaTop-107 Seal or SikaSeal-105 to the bare wall, then re-plaster using Sika-1 or Sikalite-101 in the mix. Painting over a damp wall does not cure it — the water source must be blocked first.
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Bathroom leakage
Bathroom leakage solution — with and without removing tiles
Most bathroom leaks come through cracked or porous tile grout and gaps around the floor drain, pipes and fittings. Without removing tiles, rake out the old grout, re-grout with an epoxy grout such as SikaCeram-850 Design and seal gaps around fittings with Sikaflex sealant. If water is coming through the slab itself, the tiles must come up: apply two coats of SikaTop-107 Seal to the floor and 30 cm up the walls (higher in the shower), then re-tile with a polymer tile adhesive such as SikaCeram-205.
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Water tank leakage
Water tank leakage repair: how to waterproof a concrete tank
To repair a leaking concrete water tank, empty and clean it, repair cracks and honeycombed concrete, then apply a cementitious waterproofing slurry to the inside. For water-retaining structures SikaSeal-105 is applied at 3.0–6.0 kg/m² in total, in a minimum of two coats; Sikadur-31 CF Slow epoxy repairs damaged concrete before coating. For drinking-water tanks, confirm the product's potable-water suitability on the current Sika datasheet before use.
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Tile fixing
Tile adhesive (tile bond) and grout: which one to use
Use a cement-based tile adhesive (often called tile bond) instead of a sand-cement mortar bed: it grips better, needs a thinner layer and avoids hollow tiles. For ordinary ceramic tiles SikaCeram-90 (20 kg and 40 kg bags) is the economical choice; for porcelain, large tiles and marble use the flexible C2TE-rated SikaCeram-205, or the white SikaCeram-103 for marble and light stone. Coverage is roughly 3–4 kg/m² for normal 20×20–40×40 cm tiles with an 8 mm notched trowel.
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Crack repair
Wall and concrete crack repair: which product to use
Match the product to the crack. Fine non-structural cracks in concrete are sealed by gravity-feeding the low-viscosity epoxy Sikadur-20 Crack Seal into a vee-notched crack (up to 10 mm wide). Broken or spalled concrete is rebuilt with Sikadur-31 CF Slow epoxy mortar. Cracks that open and close with temperature are joints, so they need a flexible sealant such as Sikaflex Construction or Sikacryl-110. Hairline plaster cracks are filled and smoothed with SikaWall-720 E skim coat. Wide, growing or diagonal cracks in beams and columns need a structural engineer.
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Waterproof plaster & concrete
Waterproof plaster and concrete: Sika-1 vs Sikalite-101
Add an integral waterproofer to the mix so the plaster, screed or concrete itself resists water. Sika-1 is a liquid: dilute 1 part Sika-1 in 10 parts water (about 3% of the cement content) and use that as the mixing water; with very wet sand use 1:8. Sikalite-101 is a powder dosed at 2% of the cement weight. Both reduce water absorption but don't replace a surface waterproofing membrane on roofs, tanks and wet areas.
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Roof heat proofing
Roof heat proofing: how to keep a hot roof cooler and waterproof
Roof heat proofing reduces the sun's heat that a flat concrete roof soaks up and passes into the rooms below. The simplest step is a light-coloured coating on the roof: a light surface reflects more sunlight than bare grey concrete, so the slab heats up less. Because a roof that leaks also loses any heat-proofing layer, do it together with waterproofing: repair cracks, then apply a light-coloured elastic membrane such as Sikalastic-510 over the whole roof. For a large drop in indoor temperature, an insulation layer (for example foam boards under tiles) is added as well; check each product's datasheet for its colour and reflectivity before choosing.
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