Polyurathane Sealant

Product Details:

Nitoseal ® PU40
One part, PU based Building & ExpansionJoint SealantNitoseal® PU40UsesNitoseal PU40 is suitable for sealing joints in concrete, brickwork, blockwork, precast panels, stone cladding, perimeter sealingaround doors and windows, and non trafficked floor joints.Advantages Adhesion to most common building materials Single component with fast rate of cure Easy to apply UV resistant Primerless for most applications (see “Priming Available in a range of colours ISO11600:2002 Type F 25LM compliantStandards compliance ISO11600:2002 Type F 25LM ASTM C920-95 Type S, Grade NS, Class 25 US Fed Spec TT-S-00230a Type II, Grade NS, Class25DescriptionNitoseal PU40 is a one part, low modulus gun grade elastomericsealant based on polyurethane technology. Nitoseal PU40 maybe applied to joints between 5 and 35mm wide. To minimisestress imposed on the joint sealant, all moving joints shouldbe designed to an optimum width to depth ratio of 2:1 with anoverriding minimum depth of 5mm for non-porous surfaces and10mm for porous surfaces.For joint widths exceeding 35mm, please contact your localFosroc Technical Service Department.PropertiesForm Smooth, nonslumpingpasteColour For current rangecontact FosrocSkinning time at approx 2 hours20ºC / 50%RHCure rate at 20ºC/ 24 hours 3mm50% RHApplication temperature 5ºC to 50ºCHardness at 20ºC Shore “A 25Movement accommodation factor (MAF) 25%UV resistance Very GoodService temperature range -40ºC to 70ºCApplication instructionsJoint surfaces must be clean, dry and free from frost. Removeall dirt, laitance, loose material and foreign matter. Remove allrust, scale and protective lacquers from metal surfaces.Removal can be achieved by rigorous wire brushing, grindingor grit blasting. When resealing, the existing sealant should beremoved from the joint and the arris cleaned back to soundclean concrete. All debris should be removed.Any expansion joint filler must be checked to ensure it is tightlypacked and no gaps or voids exist at the base of the sealingslot before positioning a bond breaker.The use of a bond breaker is not required in expansion jointscontaining cellular polyethylene joint filler such as Hydrocell XL, Backing rod or Expandafoam. For construction or contractionjoints a bond breaker tape or back-up strip must be used.Where a particularly neat finish is required, mask the face edgesof the joint before sealing and remove immediately after toolingis completed.
PrimingA primer is not normally required. In joints subjected to highovement or where intermittently immersed during service, Fosroc Primer 7 (porous substrates, drying time 30 minutes)or Fosroc Primer 4 (non-porous substrates, drying time 2-5minutes) is recommended.Prime the joint face using a clean, dry brush. Avoid overapplication of primer, to prevent causing puddles in the bottomof the joint.If a primed joint on porous substrate is left unsealed for morethan 4 hours, the primer should be removed by grit blasting orgrinding and the joint re-primed; on non-porous substrate, jointshould be re-primed.(For further advice on priming required please contact your localFosroc Technical Service Department).Application and finishingSachetsCut and remove the end of the sachet and place sachet in theFosroc GX gun.Fit the nozzle and cut at 45 degrees to a suitable size for sealingthe joint.CartridgesCut and remove the end of threaded stub on cartridge. Fit thenozzle and cut at 45 degrees to a suitable size for sealing thejoint.Fosroc Primer 4 is highly flammable. See Product SafetyData Sheet for details.Fosroc Equipment Cleaner and Fosroc Solvent 102 areflammable. Refer to appropriate Product Safety Data Sheet.CleaningClean tools immediately after use with Fosroc EquipmentCleaner or Fosroc Solvent 102.

Additional Information:

• Delivery Time: SAME DAY
• Packaging Details: 600 ML Cartridges