Unibond white silicone sealant 300ml tube. Waterproof, mould resistant, permanently flexible for interior and exterior use. Excellent adhesion to most materials including many plastics, vitreous enamel, glass, metal,glazed ceramic and porcelain tiles. It is designed to seal around baths, sinks and other sanitary fixtures.
I've seen these on sale in Wickes for £6 or £7 and are currently on sale at screwfix for £4.99screwfix.com/p/u…352
I know you can get cheap tubes of sealant from pound shops etc. but this is a good quality product and you can definitely tell the difference. More importantly, a bargain price.