Nikwax tech wash 1 litre the nikwax tech wash 1 litre 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 nikwax tech wash is recommended for maintaining technologies such as gore tex sympatex permatex event and nikwax analogy clothing tech wash 1l bottle no propellant gases environmentally safe not tested on animals machine