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 breathe
Usage
Waterproofing:- Flat and sloping roof structures
- External balcony and terrace decks
- New construction and refurbishment projects
- Applied typically to cementitious, bituminous, brick, asbestos cement, metal, tiled substrates
- Roofs with numerous details such as penetrations, drains, roof lights and complex geometry
- Failing roofs to extend service life
- Underneath bonded tiles on balcony and terrace decks
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 breathe
Packaging
21 kg container
Colour
Light grey
Product Details
APPROVALS / STANDARDS
- Analysis of Paint USEPA Method 24, Sikalastic®-632 R, Material Lab, Test report No. 172075EN171253(1)
- Elongation, Tensile Strength, Phosphorus Strength, Durometer Hardness A tests ASTM D412-06a, Sikalastic®-632 R, Korea Testing & Research Institute, Test report TAJ-003445
- Hardness, Weight loss, Nonvolatile ASTM C 836-03, Sikalastic®-632 R, SGS Korea, Test report No. CMT2017-1028
- Initial Surface Absorption BS 1881 : Part 208, Sikalastic®-632 R, Department of Science Service Thailand, Test report No. 0307/681
- Root Resistance DIN 4062, Sikalastic®-632 R, kiwa, Test report No. P 10565a-E
- Tensile ASTM D 412 - 06a, Sikalastic®-632 R, SGS Korea, Test report No. CMT2018-2265
- Water Vapour Transmission and Permeance ASTM E96/96M, Sikalastic®-632 R, Korean Testing & Research Institute, Test report No. TAK-2018-121232
Composition
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 Structure
Substrate Priming
| Substrate | Primer |
| Concrete / Cementitious Substrate | Sikalastic® U-Primer |
| Asphalt / Bituminous Sheet | Sikalastic® Metal Primer |
| Metal - Ferrous or galvanised metals, lead, copper, aluminium, brass or stainless steel | Sikalastic® Metal Primer |
| Any other substrate | Contact Sika Technical Service team |
Build-up
| Coating System | Reinforced System |
| Min. 2 x Sikalastic®-632 R * | 1 x Sikalastic®-632 R fully reinforced with Sikalastic® Fleece or Sika® Reemat |
| Total consumption ** : 1.05–2.10 kg/m² | Total consumption ** : 1.75–2.45 kg/m² |
* local reinforcement is recommended with Sikalastic® Fleece, Sika® Reemat, Sika® Flexitape and/or Sika® Flexistrip in areas with high movement, irregular substrate or to bridge cracks, joints and seams on the substrate as well as for detailing.
** consumption figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level and wastage.
Shore A Hardness
| ~62 | (ASTM C836-03) |
Tensile Strength
| ~4.0 MPa | (ASTM D412) |
Tear Strength
| ≥ 15 N/mm | (ASTM D624) |
Crack Bridging Ability
| 2 mm (no cracks) | (ASTM C836) |
Resistance to Root Penetration
| Pass | (DIN 4062) |
Water Absorption
| 0.643 (perms) | (ASTM E96/96M) |
Chemical Resistance
Resistant to many chemicals. Contact Sika Technical Service for additional information.
Service Temperature
-35 °C min. / +80 °C max.
Dry Film Thickness
| Coating System | Reinforced System |
| 0.6–1.2 mm | 1.1–1.5 mm (including reinforcement) |
Application
Ambient Air Temperature
+10 °C min. / +40 °C max.
Relative Air Humidity
5 % min / 85 % max.
Substrate Temperature
+5 °C min. / +60 °C 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 Moisture Content
Refer to Product Data Sheet of the appropriate primer
Substrate Pre-Treatment
Reference must be made to the Sika® Method Statement: Sikalastic®-632 R.
| Substrate | Primer |
| Cementitious including concrete slabs | Sikalastic® U Primer |
| Brick and Stone | Sikalastic® U Primer |
| Ceramic tiles (unglazed) | Sikalastic® U Primer |
| Bituminous coatings (aged) / Bituminous felt (aged) | Sikalastic® Metal Primer |
| Metals * | Sikalastic® Metal Primer |
| Existing SikaRoof® MTC System | Sika® Reactivation Primer |
| Wooden substrates** | Sikalastic® Primer C / Sika® Bonding Primer. |
* Ferrous or galvanised metals, lead, copper, aluminium, brass or stainless steel; Factory coated metal sheeting must be tested for adhesion before proceeding
** Timber based roof decks require a complete layer of Sikalastic® Carrier
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.
EQUIPMENT
Select the most appropriate equipment required for the project:
Application
- Brush: Soft bristle brush
- Roller: Solvent resistant, “non-fuzzy” roller
- Airless spray: Pressure: 200–250 bar, nozzle dia: 0,38 mm–0,53 mm, angle: 50°–80°
For more detailed information refer to the Sika Method Statement: Sikalastic®-632 R
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.