Sikalastic®-632 R
SINGLE COMPONENT, LIQUID APPLIED, RAPID CURE, PURE POLYURETHANE ROOF WATERPROOFING MEMBRANE
Sikalastic®-632 R is a rapid cure, one component, moisture-triggered, pure polyurethane, liquid applied membrane based on unique i-Cure® technology.
- 1 component pure polyurethane
- 1 material for horizontal / vertical areas
- 1 hour early rain resistant
- UV resistant
- High solid content
- Root penetration resistant
Usage
Exposed or concealed waterproofing membrane on flat or pitched roofs both for new construction and refurbishment of old roofs.Advantages
- 1 component pure polyurethane
- 1 material for horizontal / vertical areas
- 1 hour early rain resistant
- UV resistant
- High solid content
- Root penetration resistant
Packaging
21 kg pails
Colour
Light grey
Product Details
Chemical Base
One component moisture triggered pure polyurethane
Shelf Life
6 months from date of production
Storage Conditions
Store in dry condition in original, unopened and undamaged packaging at temperature between +10 °C and +30 °C.
Density
~1.40 kg/l | (EN ISO 1183-1) |
Solid content by weight
~90 % (+23 °C / 50 % r.h.)
Solid content by volume
~82 % (+23 °C / 50 % r.h.)
System Structure
Substrate Priming
Substrate | Primer |
Concrete / Cementitious Substrate | Sikalastic® U-Primer |
Asphalt / Bituminous Sheet | Normally not required * |
Metal - Ferrous or galvanised metals, lead, copper, aluminium, brass or stainless steel | Sikalastic® Metal Primer |
Any other substrate | Contact Sika Technical Service team |
* Color change to cured Sikalastic®-632 R may occur
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 1 x Sikalastic®-632 R |
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.
** consumption figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level and
wastage etc.
Resistance to Root Penetration
Pass | (DIN 4062) |
Tensile Strength
~4.0 MPa | (ASTM D412) |
Crack Bridging Ability
2 mm (no cracks) | (ASTM C836) |
Tear Strength
≥ 15 N/mm | (ASTM D624) |
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.
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
+10 °C min. / +45 °C max.
Substrate Moisture Content
< 4 % pbw moisture content. Test method: Sika®-Tramex meter, CM – measurement or oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet).
Substrates
Pre-Treatment
Concrete / Cementitious Substrate
New concrete should be cured for at least 28 days. Inspect the concrete, including upstands, all areas should be hammer tested. Concrete must be suitably finished by wood float or steel pan. The surface finish must be uniform and free from defects such as laitance, voids or honeycombing. Mortar joints must be sound and preferably flush pointed. Ensure all ceramic tiles are sound and securely fastened, replacing obviously broken or missing sections.
Asphalt / Bituminous Sheet
Volatiles and organics oils in the sheets can cause bleeding and slight nondetrimental staining. The asphalt must be carefully assessed for moisture and/or air entrapment, grade and surface finish prior to any coating works being carried out.
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
Before applying Sikalastic®-632 R on Sikalastic®-632 R allow:
Ambient conditions | Minimum waiting time | Minimum waiting time |
+20 °C / 55 % r.h. | 6 hours | 2 days |
+30 °C / 85 % r.h. | 3 hours | 2 days |
Note: times are approximate and will be affected by the layer thickness, the substrate temperature.
* After 2 days the surface must be cleaned and primed prior to the application of another layer of Sikalastic®-632 R
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 |
* In case of early rain superficial surface damage has to be expected without affecting the integrity of the coating.
The initial surface tackiness of the cured Sikalastic®-632 R will disappear within 2 weeks of application.
SUBSTRATE PREPARATION
Concrete Cementitious Substrate
Cementitious or mineral based substrates must be prepared mechanically using abrasive blast cleaning or scarifying equipment to remove cement laitance and to achieve an open textured surface. Loose friable material and weak concrete must be completely removed and surface defects such as blowholes and voids must be fully exposed. High spots must be removed by e.g. grinding.
Repairs to the substrate, filling of joints, blowholes/voids and surface levelling must be carried out using appropriate products from the Sikaflex®, Sikafloor®, Sikadur® and Sikagard® range of materials.
Outgassing is a naturally occurring phenomenon of concrete that can produce pinholes in subsequently applied coatings. Primer will be used on porous concrete and cementitious substrates to block outgassing avoiding pin holing.
Asphalt / Bituminous Sheet
Power wash as required. All major cracks should be sealed to allow continuity of the Sikalastic®-632 R system.
Asphalt must be carefully assessed for moisture and/ or air entrapment, grade and surface finish prior to any coating works being carried out. Treat blisters by star cutting and removing any underlying water. Allow to dry and re-adhere using torch.
Any other substrate
For any other substrate to be waterproofed with Sikalastic®-632 R please contact Sika Technical Service team for assessment and substrate preparation proposal.
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
Prior the application of Sikalastic®-632 R the priming coat if used must have cured tack-free. For the waiting time / overcoating please refer to the PDS of the relevant primer. Damageable areas (handrails, etc) have to be protected with tape or plastic wrapping. Application can be done with a soft bristle brush, or with a solvent resistant, “non-shedding” synthetic nylon roller. Contact Sika Technical Service team for application using airless spray.
Detailing
Always begin the installation with the details prior to the installation of the horizontal areas. Follow same process as reinforced system.
Coating System
Apply the first layer of Sikalastic®-632 R maintaining a wet edge to ensure a seamless membrane. Once the first layer has cured enough (see overcoating time window) apply the second layer of Sikalastic®-632 R.
Reinforced System
Apply the first layer of Sikalastic®-632 R maintaining a wet edge to ensure a seamless membrane. Roll-in the reinforcement Sika Reemat or Sikalastic® Fleece and overlap by minimum 5 cm. The roller may require only a little bit of extra material to keep wetted but no further significant material is added at this stage. Once the first layer has cured enough (see overcoating time window) apply the second layer of Sikalastic®-632 R.
CLEANING OF TOOLS
Clean all tools and application equipment with Thinner C immediately after use. Hardened material can only be removed mechanically.