MASTERFLEX 460  

Polyurethane joint sealant

 Description

MASTERFLEX 460 is a two component polyurethane joint sealant. It is pourable and self-levelling. MASTERFLEX 460 is used together with MASTERFLEX 460 PRIMER, a two component clear polyurethane.

Uses

MASTERFLEX 460 can be used to seal induced and movement joints in resin floors where a combination of chemical resistance, heat resistance and the ability to withstand aggressive traffic conditions is required. Typical uses would include floors in the food processing, engineering, chemical, pharmaceutical and metal processing industries.

Benefits

• Long life
• Good chemical resistance
• Wear resistant
• Weather resistant
• Hygienic and safe
• Solvent-free
• Non-tainting
• Easy to apply

Packaging

MASTERFLEX 460 PRIMER

Part 1 : can 0.297 kg net weight

Part 2 : can 0.178 kg net weight

MASTERFLEX 460

Part 1 : pail 2.822 kg net weight

Part 2 : can 0.178 kg net weight

Colours

MASTERFLEX 460 is available in six standard colours: Cream, Green, Grey, Orange, Red, Yellow.

Other colours may be available to meet special requirements but will be subject to minimum order quantities and may require extended lead times.

Typical properties*

(*) all tests carried out at 20°C; samples cured for 28 days at 20°C

Application

Substrate quality

All substrates must be clean and free from dust and loose particles. Concrete and other cementitious substrates must be dry (maximum moisture content 4% by CM test method). All traces of contaminants, such as oils, fats, greases, paint residues, chemicals, algae and laitance, should be removed. Steel and iron substrates must be free of rust and mill scale.

Preparation of substrate

As with all surface coatings, proper surface preparation is vital to ensure the successful application and performance of MASTERFLEX 460.

For practical reasons surface preparation methods will be limited to sand blasting or grinding. Wire brushing can be used but only where other methods are impracticable. Whatever method is used, it is vital to ensure that all surface contamination is removed.

Ensure free movement of the joint by installing a joint backing rod or debonding tape. These are normally closed-cell expanded polyethylene rods.

Mixing

MASTERFLEX 460 PRIMER

Mix the two components as supplied using a slow speed stirrer (approximately 400rpm). Care should be taken to mix in any material sticking to the walls of the container.

MASTERFLEX 460

Use complete units only.

Using a slow speed stirrer (approximately 400rpm) mix the contents of the Part 1 pail for 30 seconds to re-disperse any separated material. Add the contents of the Part 2 can and mix for a further 1 to 2 minutes. Do not mix excessively as this traps air within the mix. Ensure that no undispersed Part 1 is left on the side of the pail.

Application

The application temperature must be 5°C or above but below 40°C. The substrate temperature should be at least 3°C above the dew point. Do not apply if condensation is likely to occur before full cure occurs. Failure to observe these conditions will result in failure or a poor quality job.

• Apply MASTERFLEX 460 PRIMER to the substrate using a brush. A thin layer (± 100µm) should be applied to the joint edges.
• While the MASTERFLEX 460 PRIMER is still tacky (30 minutes to 2 hours depending on the temperature) pour in the mixed MASTERFLEX 460 to fill the joint flush to the surface. Use a spatula to remove trapped air.

MASTERFLEX 460 can be applied on angled surfaces up to 2% without slumping.

If the MASTERFLEX 460 PRIMER has become tack-free, a second coat should be applied, before pouring the MASTERFLEX 460, to ensure proper bonding.

Curing

The following table should be used as a guide at 15 to 25°C.

Coverage

MASTERFLEX 460 PRIMER 50-80 linear metre/unit

MASTERFLEX 460

The following table may be used as a guide:

Joint (width x depth) Coverage

Chemical resistance

MASTERFLEX 460 will resist spillages of:

• dilute and concentrated acids: hydrochloric, nitric, phosphoric and sulphuric
• dilute and concentrated alkalis, including sodium hydroxide to 50% concentration
• most dilute and concentrated organic acids
• fats, oils and sugars
• mineral oils, kerosene, gasoline and brake fluids
• most organic solvents

MASTERFLEX 460 has limited resistance to concentrated mineral and organic acids and alkalis. It is also attacked by aggressive organic solvents such as xylene and acetone but in practice many such solvents evaporate rapidly and cause little damage.

Detailed information on chemical resistance is available from BASF Middle East.

Cleaning

Cleaning of plant and equipment should be undertaken well away from the application area. Xylene may be used to clean equipment, tools and spillages. In the case of spillages, excess material must first be absorbed onto sawdust or other disposable absorbent medium. Use correct handling procedures with solvents and take care to avoid any accidental spillage or splashes onto coated surfaces.

Part 2 containers may contain small amounts of unreacted diisocyanates (MDI). Therefore they must be decontaminated with a 5% solution of soda ash (sodium carbonate or washing soda) prior to disposal as building waste.

Maintenance

Regular cleaning and prompt clean up chemical spillages will prolong the life of all joint sealants.

Specialised floor cleaning equipment and chemicals are ideally available and the suppliers are able to offer advice on appropriate cleaning regimes. Consult your specialist applicator or BASF Middle East office for advice.

Storage

MASTERFLEX 460 and MASTERFLEX 460 PRIMER should be stored under cover and clear off the ground. Storage conditions should be dry, above 5°C and below 30°C. Upon storage some sedimentation of the Part 1 component may occur; this will be readily dispersed during mixing and has no effect on the product's performance.

Health and safety

Appropriate health and safety advice can be found in the Material Safety Data Sheets.

Users are advised to wear gloves and eye protection when mixing and applying MASTERFLEX 460 PRIMER and MASTERFLEX 460.

Safety precautions

As with all chemical products, care should be taken during use and storage to avoid contact with eyes, mouth, skin and foodstuffs (which can also be tainted with vapour until products is fully cured or dried). Treat splashes to eyes and skin immediately. If accidentally ingested, seek medical attention. Reseal containers after use and dispose off empty containers correctly.

Note

Field service, where provided, does not constitute supervisory responsibility. For additional information contact your local BASF representative.

BASF reserves the right to have the true cause of any difficulty determined by accepted test methods.

Quality and care

All products originating from BASF's Dubai, UAE facility are manufactured under a management system independently certified to conform to the requirements of the quality, environmental and occupational health & safety standards ISO 9000, ISO 14001 and OHSAS 18001.

09/99 BASF-ME revised 06/2002

* Properties listed are only for guidance and are not a guarantee of performance