DAP Blockade Red Acrylic Fire Stop Sealant 10.1 oz is a sealant that is used to help prevent the spread of fire. It is made of acrylic and is red in color. It is easy to apply and is great for use in homes and businesses. Blockade is a single component, water-based intumescent acrylic fire stop sealant. It meets for Fire Tests of Penetration Fire stops. Intumescent product expansion fills the void created by combustible materials burned during a fire.