This fragrance-free toilet cleaner is hypoallergenic and free from petrochemicals, phosphates, preservatives, enzymes and synthetic perfumes. For best results, use the product under the bowl rim and leave overnight, then use a toilet brush to remove the dissolved scale. For best results, we recommend using the product under the bowl rim and leaving overnight, then using a toilet brush to remove dissolved scale. Suitable for septic tanks Fragranced with essential oils 100% UK post consumer waste bottles Cruelty-free Vegan-friendly About Bio D : Bio D are committed to making cleaning products that dont cost the earth and contribute to a healthier, more sustainable planet. For more than 25 years they have been creating household products that are effective and kinder to the environment. All Bio-D products are made in the UK Every one of the Bio D product boxes, sprays, hand pumps and bottles contains 100% of their very own product, which is made in their factory in Hull, England by them and no one else. They have complete traceability on their ingredients. Bio-D products conform to the highest food grade specification BSEN1276 Their products help to control traces of E.coli, Salmonella and MRSA; theyre safe for use in professional/trade kitchens, meaning additional peace of mind when you use them at home. This fragrance-free toilet cleaner is hypoallergenic and free from petrochemicals, phosphates, preservatives, enzymes and synthetic perfumes. For best results, use the product under the bowl rim and leave overnight, then use a toilet brush to remove the dissolved scale.