SikaSeal®-450 GG

• Complies to ASTM C920: Type M, Grade NS, Class 25, Use M, T & NT
• VOC test report (USEPA Method 24)

12 months from the date of production, if it is stored in undamaged, original, sealed packaging, and if the storage conditions are met.

SikaSeal®-450 GG shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5°C and +30°C.

Thixotropic paste

-20°C min. / +80°C max.

Joint configuration
Minimum Joint width: 6 mm
Maximum Joint width: 35 mm

Width: Depth Ratio
The joint width must be designed to suit the movement capability of the
sealant. Joints expected to movement a width to depth ratio of approximately
2 : 1 must be maintained. For butt joint the width to depth ratio should be 1 : 1.

Minimum joint depth is recommended:

• 6 mm for non-porous surfaces
• 8 mm for porous surfaces
• 20 mm for trafficked joints and joints that are exposed to hydrostatic pressure

At chamfered elements, don't fill the chamfer with sealant.

+5°C to +45°C, min. 3°C above dew point temperature

+5°C to +45°C

These are approx. consumption and may vary based on actual site conditions.

• All surfaces must be clean, dry and free from any loosely adhering particles.
• Check the joints edges for soundness and if found weak cut recess and fill up with suitable repair mortar.
• Correct joint depth can be established by inserting closed cell polyethylene backing rod tightly into the joint.
• When the joints have been filled with fiber filled board, this must be raked back to the required depth. Use bond breaker tape over the backer material.
• Protect surfaces with masking tape.

Concrete and Masonry

• Surfaces must be clean and dry.
• Wire brush thoroughly and remove dust and all contaminants.

Metals

• Remove any corrosion or millscale by grit or shotblast, wirebrush, grinder or chemical remover.
• De-grease the surfaces with clean cloths soaked in oil-free cleansing solvent.

Priming

• Application of Sika® Primer-101 should not be carried out below 5°C.
• A single coat of primer should be applied by brush in accordance with the instructions on the primer tins.
• Sika® Primer-101 must be allowed to dry to a tack free state before applying SikaSeal®-450 GG.
• SikaSeal®-450 GG should be applied within 3 hours of primer, otherwise repriming will be necessary.

• Mix and use one complete unit at a time. Do not subdivide.
• SikaSeal®-450 GG is supplied with base and catalyst in the same single container.
• Mix curing agent with base material for 5 - 10 minutes using a suitable paddle fitted to a 500 rpm electric drill moving the paddle completely through the mass of the material.
• The sides and base of the container should be periodically scraped down with a palette knife to ensure all of the catalyst is completely blended with the base component.
• Failure to completely disperse catalyst throughout the base compound will result in uncured sealant.
• Once mixed SikaSeal®-450 GG should be used immediately.

• Where required, protect the surface with masking tape.
• Sealant is formulated to be applied using a sealant gun but may be applied by trowel if required.
• Sealant guns are fitted with conical nozzles which can be cut to suit the joint width.
• The sealant should be gunned into the joint using uneven trigger pressure, cleaning the nozzle occasionally to avoid contamination.
• Deep joints should be filled in two or more runs, to prevent air entrapment.
• When applying the sealant to a vertical joint, start application at the bottom of the joint so as to continuously support the sealant.
• Applied sealant should be tooled to a smooth finish.
• A minimum of surface lubricant such as dilute soap solution may be used to assist the process.
• Any masking tape should be removed immediately after tooling.

• Application equipment should be cleaned immediately with Sika®Colma Cleaner, acetone or any suitable cleaning solvent after use.
• Hardened / cured material can only be mechanically removed.