CRI Seal of approval. The CRI (Carpet and Rug Institute) Seal of approval program identifies effective carpet cleaning solutions and equipment that clean carpet right the first time and protect a facility’s carpet investment. Not all products clean well enough to earn the seal of approval distinction, so look for the blue and green CRI Seal of approval as proof that you are purchasing or using a quality product. The CRI Seal of approval logo is a trademark of the carpet and rug institute.