Sv850 High-Performance Self-Leveling Polysulfide Sealant Ideal for Long-Lasting Joint Sealing and Waterproofing

Product Description

Product Description

SV850 High-Performance Self-Leveling Polysulfide Sealant Ideal for Long-Lasting Joint Sealing and Waterproofing

SV850 Self-Leveling Polysulfide Joint Sealant is self-leveling and two-component elastic sealant, with liquid polysulfide polymer as basic material.Component A is basic paste and Component B is curing agent (catalyst). The cured sealant keeps good elasticity over a wide temperature range -40ºC~ 70ºC.

SV850 is low-modulus for sealing joints in Portlandcementconcrete pavementsin all climates, for use in new construction, repair or remedial applications, which provides a lasting and flexible seal.

SV850 can be used in al typical concrete joint applications on highway airfield pavements, airport parking apron, and military airport runway. The sealant bonds strongly to Portland cement concrete joints without the use of a primer,is compatible with asphalt pavement, easily applied to pavement joints using bulk dispensing system units such as joint sealant pump.

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.

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.

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-40ºC~ 70ºC 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	23ºC	≤0.4	0.1
	-20ºC	≤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±2ºC,RH50±5%, Mxing RatioA:B=100:10by weight

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.

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