Polysulphide Joint Sealant Techseal RDL 940/941

Description

TECHSEAL RDL 940/941 are two component sealant based on ‘THIOKOL’ – Polysulphide Sealant

TECHSEAL RDL 940/941 are two component sealant based on ‘THIOKOL’ – Polysulphide liquid
elastomer. It consists of a ‘base’ compound and ‘accelerator’ (Curing Agent). When the two
components are mixed together prior to application, a chemical reaction is initiated which
cures instantly to a firm, flexible rubber like seal with excellent adhesion to concrete, masonry,
wood, glass, acrylic and PVC plastics. It is capable of withstanding repeated extension,
compression & cyclic movements without the loss of adhesion and resists deterioration by
weathering, sunlight, ozone, water, salt, oils and fuels. It is far superior to all the conventional
joint sealing material like bitumen, mastics, metallic channels and expansion sheets.

RDL-940 (Gun Grade) is a non-sag material used for sealing of horizontal, vertical & ceiling joints
RDL-941 (Pour Grade) is a pourable & self leveling material used for sealing of horizontal joints only

FEATURES / ADVANTAGES

• Cures at ambient temperatures to a tough, elastic and flexible rubber like material
• Bonds strongly to most of the building materials with the use of recommended primers
• Durable, remains unaffected by UV rays, ozone and weathering conditions
• Resistant to water, salt water, 10% dil. acids except nitric acids, alkalis, most of the common chemicals, vegetable, lubricating oils and fuels
• Performs well in a temperature ranging from –20⁰C to 80⁰C
• Slip resistant (sag) can be applied in horizontal joints
• Movement capability – Provides satisfactory hermetic sealing of the joint subjected to expansion, contraction, vibration and cyclic movement within the following limits. -Movement joints up to ± 25% of the width
• Slip resistant (non-sag) can be applied in vertical & ceiling g joints
• Self leveling, after pouring in horizontal joint levels itself
• Resilient. Recovers the original width after expansion & contraction without loosing the
  surface bond
• Excellent reparability property
• It can be over coated by waterproofing compounds
• Non-toxic
• Sealant will not cause staining to concrete masonry or stones

TYPICAL APPLICATION

• Sealing of expansion, contraction & construction joints in building structures such as,
  basements, subways, retaining walls, floors, external walls and claddings of high-rise
  buildings, roof terraces & ceilings especially structural expansion joints running
  through the ceiling
• Sealing of dynamic structural cracks
• Glazing joints of window, door frame and curtain walls
• Joints & ‘J’ bolts of asbestos sheet roofing
• Sealing of water retaining structure joints such as, water tank, reservoir, dams, aqua ducts, canals, culverts and water treatment plant
• Sealing of joints in traffic areas such as, bridges, roads and car parking areas

TYPICAL CHARACTERISTCS

• Nature                                                                                    : Two Component
• Mixing Ratio                                                               Base  : Accelerator

92  : 8 parts by weight

• Consistency after mixing, RDL 940                                 : Thick, non-sag paste
  RDL 941 : Thick, flowing paste
• Application time (pot life) at 30⁰ C : 2 – 3 hours
• Initial setting time at 30⁰ C                                                : 24 hours
• Complete curing time, At 5⁰ C                                           : 8 weeks
  At 15⁰ C                                                                                   : 4 weeks
  At 25⁰C                                                                                   : 2 weeks
  At 30⁰C to 35⁰C                                                                    : 1 week
• Color-Base compound                                                         : Off, White
• Accelerator (curing compound)                                        : Dark brown to black
• Mix compound                                                                      : Grey
• Sump (sag) resistance                                                          : No Sagging

JOINT DESIGN

In building structures various (different) types of joints are designed such as Butt joints, Lap
joints, Fillets Joints, Expansion joints, Control joints and Glazing joints. As the joint expand,
contract or experience a shear movement, cyclic movements, sealant changes the shape
accordingly, but the volume of sealant remains same. Hence, in designing the joints, it is vital
that the proper width-to-depth ratio is specified so that the width of the joint is consistent with
the capability of the sealant to endure daily and seasonal cycles for prolonged periods. The
amount of movement in a joint is dependent on the length (span), the coefficient of linear
expansion of a panel section and the temperature differential of the substrate. To achieve the
long-tem, effective performance the established width-to-depth ratios are determined and are
given below:-

SURFACE PREPARATION

1. Surface preparation is the most important step before application of sealant to get best results and to avoid failure.
2. The joint surface must be dry, free from dust, coatings, bituminous mastics, concrete curing agents, mold release agents, oils, greases and loose particles.
3. Clean the joint surface by wire brush and sanding with emery paper.
4. Remove dust by compressed air or paint brush.
5. Wipe out oil and grease by solvent soaked cloth (such as Xylene, Toluene or Acetone)

BACK UP MATERIALS

Insert compressible polyethylene, polyurethane, neoprene, polyethylene butyl rod as backup
material to control depth of sealant in the joint and to provide support for tooling of the sealant.

OUR OTHERS PRODUCTS
Masterplast SPL-1, Masterplast Flow-30, Masterplast HPA, Techcryst Super, TechOThane PU, Color Membrane, Techbond 2K ECC, Blackmaster LM, Splash, Roofcoat 3, Sunshield 100, Techoxy 3, Futura 5 plus, Dermabit 4170, Elasplalt 4170, Adesobit 100, Mastercure WB-3, Masterol AEA, Masterplug 3, Masterock Basic, Master Repair kwik Fix, Paintex-4, Crakky, FlexOpatch, Mastergrout CNS-50M, Mastergrout CNS-100, Mastergrout CPG-1, Mastergrout EP 150 G, Techfoam AC-4, Techfoam PU 103, ANCHOR GROUT, TechfloorHT 200, Masterprime 52, Techfloor Mortar, Techfloor SL-2, Mastercoat EP-175, Mastercoat EN-250 N, Screat MF, Screat HF, Durathane 506 SP, Screat MF AS antistatic Polyurethane Coating, Techseal RDL 940/941, Techseal RDL 941 EH, Techseal PU-1, Techseal PU-2, Primer RDL-942/947, Masterbond EP, Master Latex, Mastercrete-M81, Fix Tile Premium G, Spectrum Tile Mate, Spectrum Tile Mate EP, TechGuard 101, TechGuard 103, Coal Tar Epoxy 4, Techrepel WB, Salt Guard, Rust Remover, Hot Epoxy Coaltar Pipe Coat, Coaltar Primer, Jolly Bitulex, Extruded Polystyrene Thermal Insulation, Armotect Bituminous Protection Board
For More information Contact on MT Services
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