Buy Sure Thick Bleach is a powerful thick fragrant bleach effective against all pathogenic organisms. Contains added detergents for improved cleaning subtle fragrance keeps drains and toilets fresh and sweet smelling. Directions. Use Sure Thick Bleach undiluted for drains, toilets etc. For general disinfection use the product diluted 1 part to 80 parts water. IMPORTANT: Bleach solution should be used with care and stored safely Bleach can cause damage to carpets, fabrics, plastic, lino floor coverings and many other common materials. N.B. Do not mix with other cleaners. Keep separate from acids. Do not use on metals surfaces such as stainless steel, chrome, etc.