PU sealant in coimbatore, Polyurethane Sealants in coimbatore, Boss 352 Paintable Sealant is designed for both interior and exterior use. Boss 352 Paintable Sealant forms a tough, flexible, resilient bond to all building material surfaces. It has excellent resistance to water, weathering and moisture vapour. Boss� 352 Paintable Sealant cures to produce a flexible seal that is non yellowing