The Sika 600ml Sikaflex Pro Polyurethane Joint Sealant is a high-performance, one-component, thixotropic, polyurethane-based joint sealant. It cures under the influence of atmospheric moisture to form an elastomeric material with adhesive properties, often without the need for priming the substrate. Sikaflex-PRO is globally supplied by Sika and meets the most stringent sealant standards, including US Federal Specification TT-S-00230C, Type II, Class A, BS4254 for one-part polyurethane-based sealants for the building industry, and JIS A 5758 for one-part polyurethane-based sealants for the construction industry.
New Sikaflex-PRO offers excellent adhesion to well-cleaned Sikaflex-PRO, cement-based materials, brick ceramics, polyurethane, epoxy, most polyester, most metals, and most timbers. It boasts high durability, good weathering resistance, and non-sag properties on vertical and soffit joints up to 30 mm in width. The sealant has a short skinning time, short cut-off string even after storage, and is ready for immediate use, eliminating the need for mixing and reducing potential errors or wastage. Additionally, it is non-corrosive, can be painted over with many water, solvent, and rubber-based paints (preliminary tests recommended), and is approved for use in potable water (AS4020:2005). It is also resistant to bacterial attack.
Features
- Density: 1.25 to 1.3 kg/litre depending on colour
- Basis: Moisture curing polyurethane prepolymer
- Application Temperature: 5°C to 40°C
- Service Temperature: -30°C to 70°C (maximum +40°C in water and temporarily +50°C)
- Shelf Life: Minimum 12 months stored dry below 30°C unopened in original container
- Shore A Hardness: 23 to 27 after 28 days (at 23°C, 50% R.H.)
- Elastic Recovery (JIS A 5758 1992): >80%
- Tensile Strength (JIS A 5758 1992): >0.2 MPa @50% elongation @+23°C
- Elongation at Break: >500%
- Skinning Time (at 23°C, 50% R.H.): 2 to 4 hours
- Cure Rate (at 23°C, 50% R.H.): 2mm in first 24 hours
