Multipurpose Clear Silicon Sealant 280ml. 151 Multipurpose Silicone Sealant, high quality seal, flexible, durable weather strong seal for many common building surfaces. 151 Multipurpose Selant, mould resistant, fits standard DIY cartridge caulking guns. Always ensure that the surface is smooth, clean, dry and free of moisture, grease and dust prior to applying. Ready to use Multipurpose Sealant.