Golden Care Teak Shield is a wonderful product. This is an invisible protectant with a non-glossy matte finish that immediately sheets water + moisture from the surface of the wood. When applied alone, the Shield will allow your Teak to acquire an even silver patina, without any nasty organic growth; lichen, mold, or moss, or, inconsistencies.
When paired with Golden Care’s Teak Protector, the Shield protects from organic growth, while the Protector blocks UV.
Together, and with proper management, results could yield several years of protection; my own set saw
Does not protect from the UV Rays of the Sun.