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KOSTER Joint Sealant FS-V is a flexible stiff / creamy polysulphide based joint sealant. When fully cured, KOSTER Joint Sealant FS-V is a rubber-elastic sealant with a high mechanical load capacity, good resistance to water, sea water, salt solutions, benzenes and mineral oils; it resists roots, does not rot and has very good retraction capabilities.
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