Product Data Sheet Show all documents

Sikalastic®-821 LV

Spray applied waterproofing membrane

Sikalastic®-821 LV is a two part, elastic, crack bridging, rapid curing polyurethane membrane. Sikalastic®-821 LV is for machine application only.

  • Excellent crack bridging properties
  • Highly elastic waterproofing membrane
  • Contains no fillers
  • Fast curing (application with plural spray equipment only)
 
Product Data Sheet Show all documents

Usage

  • As a waterproofing membrane underneath asphalt on concrete bridge decks
  • As a waterproofing membrane for concrete structures and non-trafficked concrete areas with an additional top coat for UV protection
  • As a waterproofing layer for car parks

Advantages

  • Excellent crack bridging properties
  • Highly elastic waterproofing membrane
  • Contains no fillers
  • Fast curing (application with plural spray equipment only)
 

Packaging

Part A: 209 kg drumPart B: 211 kg drum

Colour

Grey, approx. RAL 7005

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Coating for surface protection of concrete according to EN 1504-2:2004, Declaration of Performance 02 07 02 03 001 0 000020 1008, certified by notified factory production control certification body 0921, certificate of conformity of the factory production control 0921-CPR-2017, and provided with the CE marking.
  • Kiwa Polymer Institute, test report P 2366, conformity with the requirements of ZTV-I_NG, part 7, section 3, 2010, incl. bond/ shear strength test
  • Polymer Institute Dr. Stenner GmbH, test report P 1700-1, basic test on bridge deck waterproofing in accordance with TL/TB-BEL-B of ZTV-BE-B, part 3, 1995
  • Polymer Institute Dr. Stenner GmbH, test report P 2298-2, basic test according DAfStb Guideline, 2001, class OS 11 (OS F)
  • Kiwa Polymer Institute GmbH, test report P 5971-E, root resistance in accordance with DIN 4062, chapter 5.7
Product Information

Chemical Base

2-part polyurethane

Shelf Life

Part A: 12 monthPart B: 9 month

Storage Conditions

From date of production if stored properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Protect from direct sun light and frost.

Density

Part A: ~ 1.04 kg/litre Part B: ~ 1.04 kg/litre Mixed resin: ~ 1.04 kg/litre

(DIN EN ISO 2811-1)

Solid Content

≥  99 %

Viscosity

Part A: 3900 mPa·s Part B: 5900 mPa·s
Technical Information

Shore A Hardness

~ 72

Tensile Strength

~ 8 N/mm²

(DIN 53504)

Tensile Adhesion Strength

≥ 1.5 N/mm²

Crack Bridging Ability

Dynamic crack-bridging properties  ≤ 0.3 mm at -20 °C

static crack-bridging properties  ≤ 1.0 mm

Chemical Resistance

Resistant to de-icing salts, bitumen and alkalis

Thermal Resistance

Short term resistant to mastic asphalt up to +240 °C

Application

Application Information

Mixing Ratio

Part A : Part B = 1 : 1 by volume

Layer Thickness

Min. 2mm

Ambient Air Temperature

+8 °C min. / +45 °C max.

Relative Air Humidity

≤ 85 %

Dew Point

The substrate and uncured membrane must be at least 3 °C above dew point to reduce the risk of condensation or blooming of the membrane finish. Protect from direct sun light and frost. Beware of condensation

Substrate Temperature

+8 °C min. / +45 °C max.

Substrate Moisture Content

≤ 4 % according CM method

Gel time

20 to 25 seconds

Waiting Time / Overcoating

Before applying Sikalastic®-823/-825 on Sikalastic®-821 LV allow:

TemperatureMinimum

Maximum

+10 °C

60 minutes2 months1)

+20 °C

30 minutes

2 months1)

+30 °C

20 minutes

2 months1)
+40 °C20 minutes2 months1)

1) Assuming that any dirt has been carefully removed and contamination is avoided.
Consumption

Consumption

~ 1 kg/m²/mm
Application steps

APPLICATION

Spray with a suitable plural component, heated spray equipment; material temperature approx. +70 °C

CLEANING OF TOOLS

Clean all tools and application equipment with Thinner C immediately after use. Hardened and / cured material can only be removed mechanically.

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