Eco-friendly impregnation spray for cotton Impregnation spray for cotton material. Fibertec Cotton Guard Eco is perfect for impregnating, for example, scout tents, old military tents or anything made of cotton with. The spray also works on mixed materials but there should be at least 50% cotton in the fabric. After impregnation, the surface becomes strongly water-repellent. Dry at room temperature. The product is free of fluorocarbons and biodegradable.
