Product Data Sheet Show all documents
Sikalastic®-851

Sikalastic®-851

Liquid applied Polyurethane/ Polyurea Hybrid membrane

Sikalastic®-851 is a two part, elastic, 100% solids, very fast curing and coloured Polyurethane/ Polyurea-Hybrid liquid applied membrane with moderate chemical resistance.

  • Very fast reactivity and curing time
  • Almost immediate return-to-service time
  • Applicable in temperatures from -10 °C to +50 °C
  • Performs in constant dry temperatures from -30 °C to +100 °C
  • Excellent crack bridging properties
  • Moderate chemical resistance
  • Good abrasion resistance
  • Not UV resistant
 
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Product Data Sheet Show all documents

Usage

On Concrete:
  • Waterproofing on concrete bridge decks, membrane underneath hot rolled asphalt, certified in accordance to BBA/HAPAS
  • Waterproofing on concrete bridge decks, membrane underneath mastic asphalt, tested in accordance to ETAG 033
  • Waterproofing for submersed structures
  • Waterproofing for cut and cover structures
  • Waterproofing on walkways and balconies
  • Waterproofing on floors and car park decks
  • Water retaining structures in power plants
  • Tank, bund and pit lining in fresh water areas of sewage and waste water treatment plants
On Steel:
  • Truck bed lining

Advantages

  • Very fast reactivity and curing time
  • Almost immediate return-to-service time
  • Applicable in temperatures from -10 °C to +50 °C
  • Performs in constant dry temperatures from -30 °C to +100 °C
  • Excellent crack bridging properties
  • Moderate chemical resistance
  • Good abrasion resistance
  • Not UV resistant
 

Packaging

Part A

211 kg drums approx. 189 litres (Isocyanate)

Part B

202 kg drums approx. 189 litres (Polyol/ -amine)

Colour

Part A

clear

Part B

grey

Grey, approx. RAL 7004

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

Conformity with LEED v2009 IEQc 4.2: Low-Emitting Materials - Paints and Coatings

APPROVALS / STANDARDS

  • Coating for concrete protection according the requirements of EN 1504-2/2004, DoP 02 07 0 20 5001 0 000003, certified by FPC Notified Body and provided with CE-Marking
  • KIWA Polymer Institut GmbH, report No. P9016-1-E, 2014, Testing od static and dynamic crack bridging ability in accordance with DIN EN 1062-7, as well as bond strength after freeze-thaw-cycling with de-icing salt immersion and after thundershower cycling in accordance with. DIN EN 13687-1 and -2, in combination with Sikafloor®-161
  • KIWA Polymer Institute GmbH, report No. P7934, 2014,Testing of the root resistance in accordance with DIN 4062
  • Prüfinstitut Hoch, test report No. 140941, reation to fire classification in accordance with DIN EN 13501-1
  • Dr. Kemski, determination of radon diffusion coefficient and radon diffusion length in accordance with DIN ISO 11665-10
  • KIWA Polymer Institute GmbH, test report P-10064-1, test on accordance with German Guideline "Liquid applied waterproofing kits for buildings" (PG-FLK)

 

Product Information

Chemical Base

Poyurethane/ Polyurea Hybrid

Shelf Life

12 month from date of production

Storage Conditions

The packaging must be stored properly in original, unopend and undamaged sealed packaging, in dry conditions at temperatures between +5°C and +30°C. Protected from direct sunlight.

Density

Part A

approx. 1.08 kg/l

Part B

approx. 1.04 kg/l

Density values determined at +20°C

Viscosity

Temperature

Part A

Part B

+20°C

approx. 2300 mPas

approx. 2300 mPas
Technical Information

Shore A Hardness

~85

(DIN 53505)

Mechanical resistance

~13 mg

H17 / 1000 g / 1000 cy

~480 mg

H22 / 1000 g / 1000 cy

Tensile Strength

~11 N/mm²

(DIN 53504)

Crack Bridging Ability

Class A5

Static

Class B4.2

Dynamic

Chemical Resistance

Sikalastic®-851 is resistant to de-icing salts, bitumen, alkalis, fresh- and ground water and various chemicals. Contact Sika technical service for specific information.

Application

Application Information

Mixing Ratio

Part A : Part B  = 1 : 1 volume

Layer Thickness

~2 mm

Product Temperature

Comp. A (ISO)

+70°C ...+80°C

Comp. B

+65°C ...+75°C

Ambient Air Temperature

+1 °C min. / +40°C max.

Relative Air Humidity

85 % max.

 

Substrate Temperature

+1 °C min. / +50 °C max.
Minimum 3 °C above dew point, beware of condensation

Curing Time

24 h at +20 °C

Gel time

~11 seconds at + 20 °C

Waiting Time / Overcoating

1–2 min at +20 °C
Consumption

Consumption

~1.05 kg/m² per mm thickness
Application steps

APPLICATION INSTRUCTIONS

APPLICATION

Dose and mix with a suitable air driven or electrical plural component heated spray equipment. Both components must be heated up to +70 °C. The accuracy of mixing and dosage must be controlled regularly with the equipment. Thoroughly stir part B (Amine) using a drum stirrer until a homogenous colour is obtained.

CLEANING OF TOOLS

Clean all tools with Thinner C immediately after use. The application equipment has to cleaned and filled with Mesamoll. Hardened and/or cured material can only be removed mechanically.

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