BOSS� 801 Pool & Spa Silicone is a one-part, low-odor, neutral cure, noncorrosive silicone adhesive/sealant. BOSS� 801 is designed to adhere ceramic tile to many substrates such as acrylic, fiberglass, ABS, PVC, wood and masonry. It also provides an excellent seal for spa jets and fittings. Ideal for bathroom tile installations.