LOCTITE 4204 Instant Adhesive is single component, toughened/flexible, ethyl cyanoacrylate product that offers high temperature and humidity resistance and is ideal for bonding small to medium-sized parts.LOCTITE 4204 Instant Adhesive is a high viscosity product that cures rapidly when confined between two surfaces. This general-purpose adhesive is a transparent and colorless liquid, suitable for use with metals, rubbers, and plastics while providing improved impact resistance to applications. LOCTITE 4204 is also suitable for use on polyolefins when used in combination with LOCTITE SF 770 or SF 7239 Primer.