£13.10 inc VAT Everbuild Opti-Mix Integral Waterproofer is an all-in-one plasticiser, waterproofing agent and salt inhibitor. It has a controlled dosage, a consistent mix design and is easy to use with no waste. 1 litre is equivalent to 25 litres of standard product. CE marked Tested to EN934-3 (2009) + A1 (2012). Add to Basket Quantity