Product Data Sheet Show all documents

SikaTop®-118 K11 Flex

(former Davco® K11 Flex)

2-PART FLEXIBLE CEMENTITIOUS WATERPROOFING SYSTEM

SikaTop®-118 K11 Flex is a 2-part flexible acrylic-modified cementitious concealed waterproofing system. The 2-components of SikaTop®-118 K11 Flex react chemically after mixing to form a hard and elastic film which bonds well to most concrete or masonry substrate to protect against possible ingress of water.

The application of SikaTop®-118 K11 Flex requires the surface to be saturated or wetted down prior to its application. This make SikaTop®-118 K11 Flex a practical and ideal product for waterproofing in damp conditions such as basement, wet areas and external areas of most sites where the surface has to be pre-washed prior to applying any waterproofing system. 

SikaTop®-118 K11 Flex is compatible with plastering or screeding material which can be applied directly without affecting bond.

SikaTop®-118 K11 Flex can accommodate slight movement of structure and can be used as a repair material for bridging cracks in substrate or cracks due to shrinkage up to 2 mm width.  

  • 2 components eliminates risk of incorrect mixing ratio
  • Seals lightweight aerated blocks
  • Seals precast joints
  • Anti-carbonation protection
  • Non-toxic
  • Foot trafficable when cured
  • Will not attack metal
Product Data Sheet Show all documents

Usage

As an concealed system on internal and external surfaces of wall and slab, swimming pools, kitchens, toilets, balcony, water tanks. Used on parking decks, in planter boxes, for sealing precast joints and intersection of two concrete elements, lightweight blocks, hollow blocks, aerated blocks, etc.

Suitable Substrates
  • Concrete
  • Brickwork
  • Precast Surface
  • Lightweight Blocks

Advantages

  • 2 components eliminates risk of incorrect mixing ratio
  • Seals lightweight aerated blocks
  • Seals precast joints
  • Anti-carbonation protection
  • Non-toxic
  • Foot trafficable when cured
  • Will not attack metal

Packaging

42 kg/set 

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Singapore Green Building Product (Leader) Cert. No. SGBP 4189
Product Information

Shelf Life

12 months from the date of production

 

Storage Conditions

Store properly in original, unopened and undamaged sealed packaging in dry conditions. Keep away from direct sunlight and frost.
Technical Information

Shore A Hardness

> 40 

(ASTM D2240:2015)

Tensile Strength

≥ 1.5 N/mm² , 28 days

≥ 1.2 N/mm² after immersion in 0.50 % NaOCl, 1.25 %
NH4OH or 3.70 % HCl for 72 Hrs

Elastic Recovery

Crack bridging ability

Passed

(Bridge cracks up to 2 mm)

Tensile Adhesion Strength

Adhesion to concrete

> 0.3 N/mm²

(ASTM D4541:2002)

Resistance to Water Penetration

0

(DIN 1048 Pt 5:1991)

Elongation at break

≥ 150 %, 28 days
≥ 120 % after immersion in 0.50 % NaOCl, 1.25 % NH4OH or 3.70 % HCl for 72 Hrs

Application

Application Information

Pot Life

2 hours

(~30 °C)

Drying Time

1 - 3 hours

(Touch Dry)

Contact Time

4 hours

(Foot Trafficable)
Consumption

Consumption

Set Size (kg)Coverage (m²)Thickness (mm)
4215 – 20 ~ 1.2 to 1.5

Wet film thickness : 0.7 ± 0.1 mm/coat.
Application steps

SUBSTRATE PREPARATION

Clean the substrate of any protrusion or substances that may damage the membrane. Ensure all surfaces are free from dirt, dust, grease, oil, wax, curing compounds and any other loose contaminating materials.


Fill all voids, cracks, edges and angles with SikaGrout®-180 or suitable repair material, so that the prepared surface is sound, even and level.

MIXING

Pour SikaTop®-118 K11 Flex Liquid into a clean mixing container. Add the SikaTop®-118 K11 Flex Powder gradually while mixing until a lump free plastic
consistency is achieved. It is recommended that mechanical mixing (400 - 500 rpm) should be used for 2 - 3 minutes to ensure proper dispersion of the components. NO ADDITION OF WATER IS ALLOWED.

 

APPLICATION

  • Pre-wet the surface with clean water. Do not allow water ponding.
  • Very porous surface must be primed with Sikalastic®-500 Acrylic Primer AP prior to applying SikaTop®-118 K11 Flex.
  • Apply the mixed material onto the prepared surface using a block brush, squeegee or roller in a stiffling action.
  • Apply 1 - 2 coats finish depending on site conditions and film thickness required. If a trowel is used for application, all undulating or uneven areas must be patched to level before applying the SikaTop®-118 K11 Flex to prevent the material from building up too thick in one application.
  • Before a 2nd coat is applied, the 1st coat must be left for approximately 2 - 3 hours depending on the thickness, substrate porosity and the temperature until it is dry. The 2nd should be applied in a direction perpendicular to the 1st coat.

CLEANING OF TOOLS

All tools and equipment should be cleaned immediately with clean water after use. Hardened material can only be removed mechanically.

 

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