Sikalastic®-841 ST

Application area

:

Interior | Exterior

Application area option

:

Concrete

Chemical Base

:

Pure Polyurea

Colour

:

Part A: Clear | Part B: Grey *Grey, approx RAL 7005

Shelf Life

:

12 month from date of production

Storage Conditions

:

Must be stored properly in original, unopened and undamaged sealed packaging, in dry and cool conditions

Type

:

Polyurethane liquid membrane

Usage

:

Bridge deck waterproofing membrane | industrial and manufacturing facilities | cut and cover structures | submersed structures | walkways and balconies | floors and car park decks | structures in power plants

Packaging

:

Part A (Isocyanate): 212 kg drums approx 189 litres | Part B (Amine): 191 kg drums approx 189 litres

Ambient Air Temperature

:

-20 °C … +50 °C

Crack Bridging Ability

:

Class A5 (Static) | Class B4.2 (Dynamic)

Curing Time

:

24 h/ +20 °C

Density

:

Part A: Approx 1.12 kg/ litre | Part B: Approx. 1.01 kg/ litre *Density values determined at +20 °C

Excellent Abrasion Resistance

:

Yes

Excellent Crack Bridging Properties

:

Yes

Gel Time

:

~11 sec/ +20 °C

Good Chemical Resistance

:

Yes

Layer Thickness

:

> 2 mm (Crucial System) | ≥ 1.5 mm (Standard System)

Mechanical Resistance

:

~230 mg (H22/ 1000 g/ 1000 cy) | ~100 mg (H17/ 1000 g/ 1000 cy)

Mixing Ratio

:

Part A : Part B = 1 : 1 volume

Not Resistant To Biogenic Sulphuric Acid

:

Yes

Performs In Constant Dry Temperatures From -30 °C To +100 °C

:

Yes

Product Temperature

:

> +65 °C

Relative Air Humidity

:

< 85 %

Shore D Hardness

:

~45 - 50 (DIN 53505)

Substrate Temperature

:

+1 °C … +50 °C | ≥ 3 °C above dew point, beware of condensation

Tensile Strength

:

> 15 N/ mm² (DIN 53504)

UV Resistance

:

Yes

Viscosity

:

Temperature +20 °C: Part A (Approx 1200 mPas) and Part B (Approx 800 mPas) | Temperature +25 °C: Part A (Approx 750 mPas) and Part B (Approx 500 mPas)

Waiting Time/ Overcoating

:

1 to 2 minimum/ +20 °C

Certification

:

ISO 14001 SGS | ISO 9001 SGS