SikaTop-107 Seal KH | Two component cementitious slurry for waterproofing and damp proofing
DESCRIPTION
SikaTop-107 Seal KH is a two part polymer modified cementitious waterproof mortar slurry comprising of a liquid polymer and a cement based mix incorporating special admixtures.
SikaTop-107 Seal KH suitable for drinking water, wet room and swimming pool system.

USES
- Interior and exterior waterproofing and damp-proofing of concrete, cementitious rendering, brickwork and blockwork
- Cementitious waterproofing for drinking and portable water, wet room and swimming pool system
- Rigid waterproofing of basement walls in new construction and refurbishment
- Pore / blowhole filling
- Waterproofing basement
- Sealing fine “hairline” cracks in concrete structures (not subject to movement)
- Levelling mortar for concrete repair works
CHARACTERISTICS / ADVANTAGES
- Approved for potable water contact
- Protects against water penetration
- Easy to apply by brush, thin trowel applications
- Hand or spray applied
- No water required / Prebatched components
- Easy and fast mixing
- Very good adhesion
- Protects concrete against carbonation
- Non-corrosive to steel or iron

PRODUCT INFORMATION
Composition
- Part A: liquid polymer and additive
- Part B: portland cement selected aggregate and admixtures
Shelf life
- 6 months if stored properly in original unopened packaging
Storage conditions
- Stored in dry conditions, protected from direct sunlight and at temperatures between +5 °C and +30 °C..
Density
- Fresh mortar density: ~ 2.00 kg/ l
- Dry density: ~ 1.4 kg / m3 (TIS 1505 – 2541)
APPLICATION INFORMATION
Mixing ratio
- A : B = 1 : 4 (parts by weight)
Layer thickness
- 0.75 mm minimum / 2 mm maximum
Ambient air temperature
- +8°C min. / +35°C max.
Substrate temperature
- +8°C min. / +35°C max.
Pot Life
- ~ 30 minutes at +20°C
Waiting time to overcoating
- If waiting time period exceeds 24 hours, lightly blastclean the surface.
- SikaTop®-107 Seal KH can be overpainted using solvent based primers or coatings. SikaTop®-107 Seal KH must cure for a minimum of 7 days before overcoating.
| 10°C | ~ 12 hours |
| 20°C | ~ 6 hours |
| 30°C | ~ 3 hours |
Curing treatment
- It is essential to cure SikaTop-107 Seal KH immediately after application for a minimum of 3 to 5 days to ensure full cement hydration and to minimise cracking.
Use polythene sheeting or similar approved methods.
BASIS OF PRODUCT DATA

SikaTop-107 Seal KH: Waterproof everywhere
Important Considerations:
- SikaTop®-107 Seal KH is not a decorative treatment, and it may display “blooming” after rain or in damp weather. This doesn’t affect performance.
- Avoid application in direct sun or strong wind.
- Do not add water under any circumstances.
- Apply only to sound, prepared substrates.
- Do not exceed the maximum layer thickness.
- For waterproofing or damp-proofing, always use at least 2 coats for a total thickness of 1.5 to 2.0 mm. In areas of severe water penetration, three coats might be needed.
- Protect freshly applied material from rain.
- When waterproofing/damp-proofing, take care not to puncture the waterproof coating with fixings. Use surface bonding with products like Sikadur® -31 CF Normal or Sikaflex® Construction (AP), etc.
Ecology, Health, and Safety: Ensure compliance with safety and environmental regulations.
Application Instructions:
Substrate Quality/Pre-Treatment:
- The substrate must be structurally sound and free from contaminants, loose particles, cement laitance, oils, and grease.
- Tensile adhesive strength of the concrete must be > 1.0 N/mm².
- Prepare the substrate using suitable mechanical techniques like high-pressure water jetting, needle guns, blast cleaning, etc.
- Pre-wet the surface to a saturated surface dry condition.
- For pore/blowhole filling, blast clean to remove all contaminants.
- For use as a levelling mortar, remove surface contamination and expose blowholes and honeycombed areas. Profile the surface for better bonding.
Mixing:
- Mechanically mix SikaTop®-107 Seal KH for 3 minutes using a forced action mixer or a clean drum with a drill.
Application:
- Shake Part A before use. Pour about half of Part A into a mixing container and add Part B slowly while mixing.
- Continue mixing until a uniform, lump-free consistency is achieved. The surface must be slightly pre-wetted.
- For slurry application, apply the mixed SikaTop®-107 Seal KH either mechanically by spray or by hand using a stiff brush, applied in the same direction.
- Apply the 2nd coat of SikaTop®-107 Seal KH in a crosswise direction to the first application once the first coat has hardened.
- When using it as a mortar and applying by trowel for a smooth surface finish, mix it with a 10% reduction of Part A (~1 A : 4.5 B).
- Apply the 2nd coat as soon as the first coat has hardened.
- For pore/blowhole filling, tightly trowel the product into the pores/blowholes of the surface.
Local Restrictions: Be aware that specific local regulations may affect product data and recommended uses. Consult the local Product Data Sheet for precise information and use guidelines.





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