SikaTop® Seal-109 MY

Polymer-modified, flexible, cementitious waterproofing coating

SikaTop® Seal-109 MY is a cementitious, two-part, polymer-modified flexible waterproofing coating. It is applied to concrete and mortar to prevent water infiltration.

Good crack bridging capability (up to 1 mm at +20 °C)
Pre-batched components
Mixes and applies easily
Easily applied by roller or brush
Good adhesion to sound substrates
Impermeable
Increased frost and salt resistance
Decreases carbon dioxide penetration
Non-toxic, same as cement
Flexible
Resistant to freezing and thawing (-10 °C)
Economical

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Product Data Sheet Show all documents

Usage

Waterproofing, sealing of hairline cracks and as a protective coating against aggressive elements such as carbon dioxide (for example, in concrete repair work), frost and de-icing agents. Areas of application include water tanks, basements, car parks, terraces, balconies, bridges, retaining walls, swimming pools, RC gutters, bathroom floors and walls, planter boxes, wet rooms for example kitchens, waste water treatment plants, shower rooms and laundries.

Advantages

Good crack bridging capability (up to 1 mm at +20 °C)
Pre-batched components
Mixes and applies easily
Easily applied by roller or brush
Good adhesion to sound substrates
Impermeable
Increased frost and salt resistance
Decreases carbon dioxide penetration
Non-toxic, same as cement
Flexible
Resistant to freezing and thawing (-10 °C)
Economical

Packaging

Part A	10 kg
Part B	26 kg
Part A + B	36 kg set

Colour

Part A	White liquid
Part B	Grey powder
Parts A + B (mixed)	Dark grey slurry

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Singapore Green Label: 022-085-2370 "Eco-Friendly Building Material"

Product Information

Composition

Polymer modified Portland cement

Shelf Life

6 months from the date of production

Storage Conditions

Store properly in original, unopened and undamaged sealed packaging, in cool, dry conditions. Keep away from direct sunlight. Protect from rain, condensation and high humidity.

Density

1.7–1.9 kg/l (mixed)

Technical Information

Tensile Strength

~0.7 N/mm²

(ASTM D412-06a, Dumbell A test piece)

Tensile Adhesion Strength

~0.8 N/mm²

(EN 1542, 20 mm Ø dolly)

Permeability to Water Vapour

< 5 m

(BS EN ISO 7783:2011, Wet Cup Method A)

Capillary Absorption

< 0.1 kg/m². h^0.5

(EN 1062-3)

Permeability to Carbon Dioxide

> 50 m

(BS EN 1062-6: 2002, Method B)

Application

Application Information

Ambient Air Temperature

min. +8 °C

Substrate Temperature

min. +8 °C

Pot Life

~30 minutes (at +20 °C)
Pot life is shorter at higher temperatures. Cover material container when not in use.

Consumption

For bathroom floors, shower area floors and wet kitchen floors, minimum 2 coats at approximately 1.0 kg/m² per coat.

Splash zone area of wall with tiles, eg. bathroom wall, shower area wall and wet kitchen wall, 1 coat at approximately 1.0–1.5 kg/m² per coat.

All other areas, minimum 2 coats at approximately 1.0 kg/m² per coat. For areas subject to high water ingress, apply a third coat at 1.0 kg/m².

Application steps

MIXING

Under normal circumstances, when the full quantities of both parts are mixed together, a creamy consistency will result. Mix in a clean container by slowly adding the powder part to the liquid part and stirring with a paddle attached to a slow speed mixer (400 - 500 rpm).

APPLICATION

Whilst the substrate is still damp but free from standing water, apply the first coat by brush, broom, roller or squeegee (if the surface is flat enough), working the material well into the substrate to achieve full bond.

Allow 4–8 hours (+20 °C) for the first coat to cure before applying the following coats in the same manner.

For large areas, SikaTop® Seal-109 MY can be applied by spray using a suitable worm type mixer/pump.

An additional stripe coat is recommended over cracks, wall/floor intersections, etc. as these locations are where movement is most likely to be expected in service.