Nikwax tech wash 300ml the nikwax tech wash is a washing liquid cleaner specifically designed for waterproof textiles safely cleaning and revitalising breathability and water repellancy to clothing tents awnings marquees and rucksacks this waterproofs cleaner is recommended for maintaining technologies such as gore tex sympatex permatex event and nikwax analogy waterproof cleaning liquid 300ml bottle no propellant gases environmentally friendly not tested on animals