Product Data Sheet Show all documents
Sikalastic®-632 R

Sikalastic®-632 R

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

Sikalastic®-632 R 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.

  • Resistant to root penetration
  • Rapid curing
  • 1-part, cold applied
  • Resistant to chemical exposure
  • No mixing, ready to use
  • Seamless
  • 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
  • Vapour permeable, allows substrate to breath
Product Data Sheet Show all documents

Usage

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

  • Resistant to root penetration
  • Rapid curing
  • 1-part, cold applied
  • Resistant to chemical exposure
  • No mixing, ready to use
  • Seamless
  • 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
  • Vapour permeable, allows substrate to breath

Packaging

21 kg container

Colour

Light grey

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • International and local test results are available upon request.
Product Information

Chemical base

Aromatic polyurethane

Shelf life

9 months from date of production

Storage conditions

Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +10 °C and +30 °C.

Always refer to packaging.

Density

~1,40 kg/l

(EN ISO 1183-1)

Value at +23 °C

Solid content by weight

~90 % (+23 °C / 50 % r.h.)

Solid content by volume

~82 % (+23 °C / 50 % r.h.)

Volatile organic compound (VOC) content

≤ 150 g/L

(ASTM D2369-98 / USEPA Method 24)
System information

System Structure

Sikalastic®-632 R 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

Tensile Strength

≥ 2.0 MPa at 14days

(ASTM D412-16 - Reapproved 2021)

Crack Bridging Ability

Min 4 mm (no cracks)

(BS EN 14891:2017)

Tensile Adhesion Strength

≥ 0.8 N/mm2 at 14days

(ASTM D7234-21)

Tear Strength

≥ 10 N/mm

(ASTM D624-00)

Service temperature

–35 °C min. / +80 °C max.

    Application

    Application Information

    Ambient Air Temperature

    +10 °C min. / +40 °C max.

    Relative Air Humidity

    5 % min / 85 % max.

    Dew Point

    Beware 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 °C

    50 %

    ~3 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.

    Drying time

    Ambient conditions

    Rain resistant *

    Touch dry

    Full cure

    +20 °C / 55 % r.h.

    2 hours

    2 hours

    6 hours

    +30 °C / 85 % r.h.

    1 hour

    1 hour

    3 hours

    * Be aware the impact of heavy rain or rain showers can physically damage the wet applied membrane.

    The initial surface tackiness of the cured Sikalastic®-632 R will disappear within 2 weeks of application.

    Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.

     
    Application steps

    SUBSTRATE PREPARATION

    Suitable substrates: Cementitious, brick, stone, aged bituminous coatings and felts, metals*, asbestos cement, ceramic tiles (unglazed), wood.
    *Ferrous or galvanised metals, lead, copper, aluminium, brass or stainless steel, factory coated metal.

    Reference must be made to the Sika® Method Statement: Sikalastic®-632 R

    MIXING

    Mixing is not required, however if the product has separated, stir gently by manual or mechanical equipment thoroughly to achieve a uniform colour. Stirring gently will minimise air entrainment.

    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®-632 R for full application details.

    CLEANING OF TOOLS

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

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