Alkali-resistant primer is a protective coating specifically designed for concrete substrates. It is primarily used to seal substrate pores, isolate alkaline substances, enhance coating adhesion, and improve base strength. Alkali-resistant sealer forms a dense coating that effectively seals the pores of concrete or mortar substrates, preventing the leakage of alkaline substances and preventing efflorescence, discoloration, and flaking. Its permeability also strengthens the base structure and improves adhesion, making it suitable for construction in humid environments.