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Sikalastic-1K GB, Flexible waterproofing mortar fibre-reinforced, easy to use, Interior & Exterior, Light grey, 20 kg

Sikalastic-1K GB, Flexible waterproofing mortar fibre-reinforced, easy to use, Interior & Exterior, Light grey, 20 kg

Cement & Mortar
SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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General Specifications
Packaging 20 kg
Usage Flexible waterproofing and protection of concrete structures (tanks, basins, pipes, bathrooms, balconies, swimming pools)
Usage Area Interior & Exterior
Color Light grey
Chemical Base Cement modified with alkali resistant polymers, selected aggregates, fine fillers admixtures, additives and fibres.
Storage Conditions Store properly in the original packaging, in cool and dry conditions. Protect from water.
Density 1,5 kg/L
Application Thickness 1 mm >< 3 mm
Ambient Air Temperature +5°C >< +35°C
Substrate Temperature +5°C >< +35°C
Working time 30 minutes
Waiting Time 30 minutes
Consumption 1.2 kg/m²/mm

One-component cementitious mortar, fibre-reinforced for flexible waterproofing and concrete protection

Sikalastic-1K GB is a one-component, crack-bridging, fibre-reinforced mortar, based on cement modified with special alkali-resistant polymers. Sikalastic-1K GB is suitable for application by brush or trowel.

  • One-component product, only water needs to be added
  • Adjustable consistency, easy to apply by brush or trowel
  • Good sag resistance and easy to apply, even on vertical surfaces
  • Good crack-bridging ability
  • Very good adhesion on many substrates including concrete, cement mortars, stone, masonry
  • Can be applied on damp substrates
Usage
  • Flexible waterproofing and protection of concrete structures including tanks, basins, pipes etc.
  • Waterproofing of bathrooms, showers, terraces, balconies,swimming pools before the application of ceramic tiles bonded with adhesives
  • Waterproofing of external wall surfaces to be backfilled in ground
  • Inside waterproofing of negative water pressure of walls and floors in basements
  • Flexible protection coating for reinforced concrete structures against the effects of freeze-thaw and carbon dioxide attack to improve durability
 
Advantages
  • One-component product, only water needs to be added
  • Adjustable consistency, easy to apply by brush or trowel
  • Good sag resistance and easy to apply, even on vertical surfaces
  • Good crack-bridging ability
  • Very good adhesion on many substrates including concrete, cement mortars, stone, masonry
  • Can be applied on damp substrates
Packaging

20 kg bags
Colour

Light grey
Technical Information
Crack Bridging Ability

> 0,50 mm (Class A 3, +23 °C) 1

(EN 1062-7)

≥ 0,75 mm (+23 °C) 2(EN 14891 A.8.2)
≥ 0,75 mm (–5 °C) 2(EN 14891 A.8.3)

1 Value obtained with a total layer thickness of 3 mm in two layers with 22 % water
2 Value obtained with a total consumption of 3.6 kg/m2 in two layers with 30 % water

Tensile adhesion strength

≥ 0,8 N/mm2

(EN 1542)

Value obtained with a total layer thickness of 3 mm in two layers with 22 % water

Test Method

Requirement

Initial tensile adhesion strength

A.6.2

≥ 0,5 N/mm2

Tensile adhesion strength after water contact

A.6.3

≥ 0,5 N/mm2

Tensile adhesion strength after heat agingA.6.5≥ 0,5 N/mm2
Tensile adhesion strength after freeze-thaw cyclesA.6.6≥ 0,5 N/mm2
Tensile adhesion strength after contact with lime waterA.6.9≥ 0,5 N/mm2
Tensile adhesion strength after contact with chlorinated waterA.6.7≥ 0,5 N/mm2

Values obtained with a total consumption of 3.6 kg/m2 in two layers with 30 % water

Capillary Absorption

~0,02 kg/m2·h0.5

(EN 1062-3)

Value obtained with a total layer thickness of 3 mm in two layers with 22 % water

Water Penetration under Pressure

No penetration after 72h at 5.0 bar 1

(EN 12390-8)2
No penetration after 7 days at 1.5 bar 3 (EN 14891 A.7)

1 Value obtained with a total layer thickness of 3 mm in two layers with       22 % water
2 Modified
3 Value obtained with a total consumption of 3.6 kg/m2 in two layers with 30 % water

Water Penetration under Negative Pressure

No penetration after 72h at 2.5 bar

(UNI 8298/8)

Value obtained with a total layer thickness of 3 mm in two layers with 22% water

Permeability to Water Vapour

Class I (permeable)       SD < 5 m

(EN ISO 7783-1)

Value obtained with a total layer thickness of 3 mm in two layers with 22 % water

Permeability to CO2

SD ≥ 50 m

(EN 1062-6)

Value obtained with a total layer thickness of 3 mm in two layers with 22 % water

Freeze Thaw De-Icing Salt Resistance

≥ 1.0 N/mm2

(EN 13687-1)

Value obtained with a total layer thickness of 3 mm in two layers with 22 % water
Application Information
Mixing Ratio

Application Method

Water Dosage

By brush

~6,0 litres water per 20 kg bag

By trowel

~4,4 litres water per 20 kg bag
Fresh mortar density

~1,5 kg/l
Layer Thickness

3 mm with constant thickness, applied in minimum 2 layers.
Maximum recommended thickness per layer is 2 mm when applied by trowel and 1 mm when applied by brush
Ambient Air Temperature

5 °C min. / 35 °C max.
Substrate Temperature

5 °C min. / 35 °C max.
Pot Life

~30 min at +20 °C
Waiting Time / Overcoating

Sikalastic-1K GB must be completely hardened before over-coating or water contact.
 

Guide for waiting times at the following temperatures:

+20 °C

+10 °C

Horizontal covering by tiles

~2 days

~7 days

Vertical covering by tiles

~2 days

~3 days

Water emulsion coating

~2 days

~3 days

Immersion in water~2 days~7 days
Contact with drinkable water~15 days~15 days

Times will vary due to ambient and substrate humidity.