FulaFlex™ 650FC

• Isocyanate and solvent free
• Non-hazardous according to GHS classification
• Permanently flexible in temperatures ranging from -40°C to +100°C with short periods to 120°C
• No shrinking, no bubbling
• Excellent primer-less adhesion to many substrates
• No sagging
• High mechanical/dynamic stress resistance – Shock/Impact resistant
• Neutral adhesive – Does not attack bonded surfaces
• Vibration and sound-dampening properties
• Shore A Hardness ~55. Suitable as an anti-pick sealant/adhesive in correctional facilities
• High bond strength - suited to Professional and DIY, construction, marine and automotive environments
• Excellent weathering resistance – Good colour stability and weather resistance
• Over-paintable wet-on-wet with many waterbased or solventbased paints (pre-testing recommended)
• Resistant to water, dilute alkalis, cleaning agents, lime water and mold

Uses:

• Sealing expansion and control joints in floors, pavement, roadways, walls, roofs, wall and floor penetrations, cladding and brickwork
• Elastic bonding of metals, engineered plastics, wood and ceramic surfaces
• In applications where a level of chemical resistance is required In seals where acoustic properties are required
• Assembly of insulated and composite panels
• Vibration-proof bonding of metal components
• Multiple high performance bonding and sealing applications in transport – trains, buses, special purpose vehicles, caravans, 4 wheel drive trailers etc

Surface Preparation: All surfaces must be clean, dry, sound and free of dust, oil, old sealant or other contamination. Lightly contaminated surfaces should be wiped with Isopropyl Al- cohol (IPA) using the 2-rag wipe method. Apply IPA to a clean lint-free cloth and wipe onto the surface to be cleaned to solubilize and remove the majority of the contaminant. A clean dry cloth should then be applied to remove remaining con- tamination and dry the surface. Ensure wet cleaner is not allowed to dry on sur- face. For more heavily contaminated surfaces or where the IPA does not remove the contaminant, a generic wax and grease remover should be applied using the same 2-rag wipe method. Once this has been completed the surface should be given a final clean with IPA using the 2-rag wipe method to ensure the surface is adequately prepared. Adhesion to metals and some surface finishes can be further improved by light abrasion prior to cleaning with IPA using the 2 rag-wipe method. Manufac- turers of plastics should be consulted about suitable cleaning solvents. Adhesion to plastics should be pre-tested. Mask either side of joint to produce a neat finish. Use a suitable sized foam backing rod or polyethylene bond breaker tape to prevent three sided joint contact impeding the free and even deformation of the sealant in a cyclic joint. Open-cell polyurethane foam is recommended. Use a size 25% wider than the joint width that will compress when inserted into the joint..

Product Application: Cut tip off cartridge or end of sausage. Angle cut nozzle to desired size. Screw nozzle onto cartridge or set in sausage barrel gun. Apply sealant in a steady, continuous flow by pushing the sealant ahead of the nozzle so that it completely fills the joint and is in contact with both sides. Immediately after application, tool the sealant using a spatula. The use of water / soap solutions is not recommended. Avoid contact with alcohol or other solvent cleaners during cure. Remember to remove the masking tape before the sealant skins.

Painting: Flexible, acrylic-based emulsion coatings are best over FulaFlexTM 650FC, although pre-testing is always recommended to assess compatibility. Less flexible interior coatings are likely to crack due to their inflexibility. Oil based coatings and coatings containing a solvent are likely to remain tacky for an extended period when used over FulaFlexTM 650FC.

Chemical Resistance: FulaFlexTM 650FC provides good resistance to water, dilute alkalis, many cleaning agents, lime water and is mould resistant. Some oils can cause change in appearance of the sealant (e.g. fading or expansion), although the mechanical performance of the sealant doesn’t significantly change. Substrates exposed to chemicals must have adequate resistance to the chemicals involved.

Clean Up: Best results are obtained by masking prior to sealing to avoid the necessity for clean up. If sealant is applied to areas where it is unwanted, clean up using white spirits or another solvent cleaning solution that does not leave a residue. Cured product can only be removed mechanically.

Joint Design: A good joint design is imperative if a sound, durable seal is to be achieved In general, joints should be designed to be at least 4 times as wide as the anticipated movement. Joint width and depth should not be less than 6 mm and depth should never exceed width.
 

Limitations:

• Avoid exposure to high levels of chlorine
• Avoid contact with alcohol and other solvent cleaners during cure phase
• Pre-testing is required on marble or other highly porous stone - finish may be affected
• Solvent-based coatings may remain tacky
• Do not use on bituminous surfaces
• Do not use on materials that bleed oil and plasticisers or solvents, as this will affect adhesion (e.g. most rubbers)
• Not a fire rated or glazing sealant. Not suitable for glazing with glass, acrylic or polycarbonate sheets
• Not suitable for use in roofing lap joint applications where the sealant is feathered down to zero application weight – for such applications consider the use of silicone.
• Not suitable for swimming pools or hot tubs

Coverage:
Approximate linear meters coverage of FulaFlexTM 650FC sealant as per table:
 

H.B. Fuller FulaFlexTM 650FC is available in the following package sizes and colors:

• Cartridge: 10 fl oz
• Sausage: 600 mL