Answers, ratios and safety sheets.

By courier to any district, 2 to 4 working days from dispatch. Colombo 07 collection orders are ready during trading hours - every product page carries the current collection turnaround.

Cash at the Colombo 07 counter, or we agree payment with you on WhatsApp when your pre-order lands. Card, LankaQR and bank transfer are not switched on yet. Payment is always taken before dispatch or at collection - we do not offer credit terms at any tier.

Yes, island-wide. Rates are zoned: Colombo and Gampaha, other Western, and out-station. Products classified corrosive or flammable are the exception - no courier here will carry them, so those are collection only at Colombo 07, and their product pages say so.

No. All sales are final - we do not take products back and we do not refund, exchange or issue credit notes. These are chemicals, and once a container has left the counter we cannot resell it to the next customer as genuine unopened stock. So ask us on WhatsApp before you buy and we will tell you what suits the job, including when the answer is a cheaper product. If WE send the wrong item, that is ours to fix, not a return.

Yes. We are the exclusive Koch-Chemie agent for Sri Lanka and import direct from Unna, Germany. Every bottle is batch-traceable back through us, and you can check a batch code on the verification page before you use it.

One part product to ten parts water - so 91 ml of concentrate into 909 ml of water gives you one litre of working solution. Not 100 ml into a full litre. The chart above does this arithmetic for every ratio we sell.

Koch-Chemie's ProductSystem works like a periodic table. The letters are the product, the small number is the version. On polishes the two figures are abrasiveness and the gloss it finishes to. On cleaners you get the pH instead.

Alkaline cleaners and acid rim cleaners. Alkalines will stain bare or polished aluminium, and acid on an unsealed or hot wheel can etch it permanently. Every group card on the site states what it must never touch.

Koch-Chemie writes ratios for roughly 20°C and 50% humidity. Colombo sits closer to 31°C and 80%. Heat speeds the reaction, humidity slows evaporation. Work in shade, go one step weaker than the label, and never let a product dry on the panel.

Product pages link the latest sheet we hold, and every product is listed under Safety data sheets on our support page. If a sheet is missing, ask us on WhatsApp and we will send it the same day. Several products are classified corrosive or flammable, so please read the sheet before first use.