Check the listing for details. Congoleum Unferflor Premium Pre-Mixed Sanded Acrylic Grout. Condition: New. Listed at 107.65 USD. UnderFlor Grout is the perfect decorating accessory for Congoleum products. With a wide array of grout color offerings, there is one that will fit your décor and fit flawlessly to give your room a different look. UnderFlor premixed grout is specially formulated to enhance your tile. It features color uniformity, durability, and ease of installation. UnderFlor grout exceeds the toughest standards, providing worry-free installations, available in a variety of subtle color options. Carpets & More Our eBay Store Congoleum Unferflor Premium Pre-Mixed Sanded Acrylic Grout Specially formulated to enhance your tile. Unsurpassed stain resistance with no sealing required. Ultimate color consistency. Easy to spread and clean. Crack and shrink resistant. UnderFlor Grout is the perfect decorating accessory for Congoleum products. With a wide array of grout color offerings, there is one that will fit your décor and fit flawlessly to give your room a different look. UnderFlor premixed grout is specially formulated to enhance your tile. It features color uniformity, durability, and ease of installation. UnderFlor grout exceeds the toughest standards, providing worry-free installations, available in a variety of subtle color options.