Product Data Sheet Show all documents

Sikalastic®-633 R VN

Polyurethane 1-part rapid cure liquid applied membrane for roof waterproofing

Sikalastic®-633 R VN is a polyurethane, 1-part, rapid cure, cold-applied, moisture cured, crack bridging, liquid applied membrane. Provides a seamless, chemical resistant, durable waterproofing solution for flat or sloping roofs, external balcony and terrace decks.

  • Improved mechanical properties
  • Rapid curing
  • 1-part, cold applied
  • Resistant to chemical exposure
  • No mixing, ready to use
  • Seamless & Fully adhered
  • Moisture triggered chemistry (MTC)
  • Moves with normal thermal movement
  • Reinforced system provides waterproofing complex detailing of roof or deck penetrations
  • Rain resistant almost immediately on application
  • Vapor permeable, allows substrate to breath
Product Data Sheet Show all documents

Usage

Sikalastic®-633 R VN may only be used by experienced professionals. Waterproofing for both new construction and refurbishment of:
  • Flat and sloping roof structures
  • External balcony and terrace decks
  • Roofs with numerous details such as penetrations, drains, roof lights and complex geometry
  • Failing roofs to extend service life  

Advantages

  • Improved mechanical properties
  • Rapid curing
  • 1-part, cold applied
  • Resistant to chemical exposure
  • No mixing, ready to use
  • Seamless & Fully adhered
  • Moisture triggered chemistry (MTC)
  • Moves with normal thermal movement
  • Reinforced system provides waterproofing complex detailing of roof or deck penetrations
  • Rain resistant almost immediately on application
  • Vapor permeable, allows substrate to breath

Packaging

23 kg container

Colour

White, Light grey, Green

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Local test results - KT3-01587BXD3/R
Product Information

Chemical base

Aromatic polyurethane

Shelf life

6 months from date of production

Storage conditions

Product must be stored in original, unopened  and undamaged sealed packaging in dry conditions at temperature between +10 °C and +30 °C. Please always refer to packaging.

Density

1.43 kg/l ± 0.1 value at +20°C

Solid content by weight

93% ± 3 
System information

System Structure

Sikalastic®-633 R VN is part of the following roof waterproofing systems.

System

1st base coat

2nd base coat

SikaRoof® MTC-05 UV AP≥ 1,00 kg/m²≥ 0.75 kg/m²
SikaRoof® MTC-08 UV AP

≥ 1,00 kg/m²

≥ 1,00 kg/m²

SikaRoof® MTC-10 UV AP

≥ 1,40 kg/m²

≥ 1,00 kg/m²
Technical Information

Shore A Hardness

45 at 14days

(ASTM D2240-15)

Tensile Strength

≥ 3.0 MPa at 14days

(ASTM D412-16)

Crack Bridging Ability

up to 3mm

(BS EN 14891 : 2017)

Tensile Adhesion Strength

≥ 1 N/mm2 at 14days

(ASTM D7234-21)

Application

Application Information

Ambient Air Temperature

+5 °C min. / +35 °C max

Relative Air Humidity

5 % min / 85 % max

Dew Point

Be aware of condensation.

The substrate and uncured applied membrane must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the membrane finish

Substrate Temperature

+5 °C min. / +60 °C max

Substrate Moisture Content

Refer to Product Data Sheet of the appropriate primer.

Pot Life

Product will cure rapidly in high temperatures combined with high air humidity. Skin formation starts after ~1 hour (+20 °C / 50 % r.h.).

Waiting Time / Overcoating

Ambient temperature

Relative humidity

Minimum

+10 °C

50%

~12 hours

+20 °C

50%

~6 hours

+30 °C50%~4 hours

Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity. If the overcoating time exceeds 2 days, the surface must be cleaned and primed with Sika® Reactivation Primer before continuing.
Application steps

SUBSTRATE PREPARATION

Suitable substrates: Cementitious, brick, stone, aged bituminous coatings and felts, metals*, asbestos cement, ceramic tiles (unglazed), wood.

*Ferrous or galvanized metals, lead, copper, aluminum, brass or stainless steel, factory coated metal.

Reference must be made to the Sika® Method Statement: Sikalastic®-633 R VN

MIXING

Uniformly stir with a power mixer for about 3~5 minutes before use (Use an electric mixer from 1000RPM, 500W)

APPLICATION

Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

Reference must be made to the Sika® Method Statement: Sikalastic®-633 R VN for full application details.

CLEANING OF TOOLS

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

 

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