Sikalastic®-821 LV
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)
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
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
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
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
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:
Temperature | Minimum | Maximum |
+10 °C | 60 minutes | 2 months1) |
+20 °C | 30 minutes | 2 months1) |
+30 °C | 20 minutes | 2 months1) |
+40 °C | 20 minutes | 2 months1) |
1) Assuming that any dirt has been carefully removed and contamination is avoided.
Consumption
~ 1 kg/m²/mm
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.