KALAR® 5263 by HB Fuller is an unfilled, partially-crosslinked polyisobutylene-isoprene (IIR) rubber grade. Exhibits green strength, good electrical properties, moisture and gas impermeability. Offers excellent flow-, creep-, chemical- and aging resistance. It requires moderate shear to be processed. KALAR® 5263 is typically used in industrial sealant tape, architectural glazing tape, automotive windshield tape, tire sealant, weather-proofing sealant tape, automotive sealant and sound deadening compound. Other applications include hot-melt glazing compounds, solvent release coatings, caulks, construction adhesives and roof coatings. It is designed as the starting point product for butyl sealants that require higher modulus and/or superior durability at elevated temperatures. The shelf life of this grade is 1 year.
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KALAR® 5263 properties
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| Properties | Value & unit | Test condition | Test method |
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| Viscosity, Mooney | 0.0 Visible After Login | Visible After Login | Visible After Login |
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