SV850 Self-Leveling Polysulfide Joint Sealant
Characteristics
--Cold applied, ready to use as supplied, dispensed directly from the bulk container
into the joint by hand or with an air-powered pump.
--Unprimer adhesion primer is not required for bonding to Portland cement concrete.
--lrregular pavement sealing-The brokenjoints can be sealed as long as there is
enough interface between sealantand substrate.
--Movement capability-+100% extension and 50% compression.
--Low modulus - The sealant only places little stress on joint interface when it
reaches 100% elongation,which allows continuous movement to ensure sealing
performance.
--No pollution-Free of solvent and volatile substance, environmentally friendly and
no corrosion to substrate.
--Curing time-The sealant will have a skin-over timeofone houror less as
standardconditions.
--Excellent oil resistance property-fulilled SSS-200E.
--Good durability and weatherability-SV850 Sealant is ready for use over a
wide temperature range of-40℃~ 70℃ and has long service life.
Typical Properties
| TEST ITEM | REQUIRE VALUE | TEST RESULT | |
| Color | Com A: Yellow or White, Com B: Black | ||
| Snap Time,min | ≥ 40,oras request | 45 | |
| Tack-Free time,h | ≤24 | 50 | |
| Self-leveling Property | Self-leveling, smooth and flat | Smooth andflat | |
| CuringTime,d | - | 7 | |
| Complete Adhesion, d | - | 7-14 | |
| ElasticRecoveryRate,% | ≥80 | 89 | |
| Tensile Modulus, Mpa | 23℃ | ≤0.4 | 0.1 |
| -20℃ | ≤0.6 | 0.1 | |
| Adhesion at Maintained Extension after Immersion in Water |
No Damage | No Damage | |
| Adhesion after Cold Extension and Heat Compression |
No Damage | No Damage | |
| Adhesionat Maintained Extension after Immersion in Oil | No Damage | No Damage | |
| Mass Loss Rateafter Heating,% | ≤6 | 1 | |
| Mass Change Rate afterlmmersion in Oil,% | ≤3 | 3 | |
| Test condition: Temperature 23±2℃,RH50±5%, Mxing RatioA:B=100:10by weight | |||
Applications
--SV850 is ideal for use in asphalt and concrete joint.
--It can be applied in newly-built highways or in sealant change and repairing of old concrete pavement. In newly-built construction, it can provide long-term sealing, extend service life and avoid contaminant's penetration to joint.
--When the old concrete joints generate problems and needs change or repairing because of aging, excessive movement or insufficient durability, However, the joints must keep clean ,dry and free of previous sealant.
Methods of Application
SV850 is ideal for use in transverse joints. As self-leveling sealant, it is not necessary to press the sealant into joint withtools. Before attempting to seal joints in new asphalt, the asphalt must be given sufficient time to cool and to cure, so that damage will notresult from sawing. This time will depend upon a number of factors, such as mix design, time of year for placement and geographic location. The asphalt must also be completely dry priorto sealant installation.In new construction, a shallow cut is recommended where the backer material is placedonthe bottom of the joint (Refer to Road Sealant Installation Specification). A shallow cut saves time and saw blades.
All old sealant and/or joint filler must be removed prior to sealant installation. In such case, the standard joint design that the backer material is slightly higher thanjoint bottom is recommended,which provides certain room for accommodating extruded sealants.
When SV850 is used for sealing reflection cracks in asphalt pavements,additionaljoint preparation steps must be used. Cracks that have formed in the asphalt pavement must be totally removed by saw-cutting. This can be accomplished by saw-cutting along both sides of the crack,exposing freshly cut and sound asphalt joint faces.
SV850 is just part of the installation system, which also includes suitable backer rod material, correct installation procedures. For further information about applications, preparations and installation,piease refer to Road Sealant Installation Standard from SIWAY.
Limitations
SV850 is not recommended for following situations:
1.Sealed and air-free areas.
2.Continuous water immersion, It should not be applied in totally confined spaces where the sealant is not exposed to atmospheric moisture.
3.It is recommended that the new concrete be allowed to cure anddry a minimum of 7 days in good drying weather before. Cold, wet weather will require a longer drying time and an additional dayof good drying weather should be allowed for each day of poordrying weather.
4.The sealant tooled must be lower than pavement surface to avoid abrasion of people and vehicle.
5. Inspect the sealant adhesion to substrate except for concrete prior to large-scale application.The product is not put to the inspection of medical treatment and pharmaceutical use.
6.The sealant should never be applied to wet or damp asphalt or concrete pavement or instaled during inclement weather.
Storage
Contact Us
Shanghai Siway Curtain Material Co.Ltd
No.668 Xinzhuan ,Songjiang District,Shanghai,CHINA Tel: +86 21 37682288
Fax:+86 21 37682288
E-mail :summer@curtaincn.com www.siwaycurtain.com
