3M™ Stain Resistant Additive SRA 450 is an solvent-based fluorinated acrylic polymer provides stain repellency and stain resistant characteristics for porous hard surfaces such as concrete, natural stone and grout. The product easily penetrates the substrate pores resulting in a low surface energy that makes it easier for fluids and stains to be removed. Additionally, 3M stain resistant additive SRA-450 offers durability and long-lasting performance.