3M Mastic tape 2166 is a professional grade waterproof cement, it has good compatibility and seal repair, can be competent for a variety of circuit insulation related products. The soft, well-shaped features are also suitable for filling irregular surfaces, while its resistance to pressure has been tested and it still works at minus 18 degrees. Its biggest characteristic is its good waterproof sealing performance, can be applied to all kinds of electrical, communication equipment waterproofs and moisture-proof, but also can be applied to the aerial insulation wire clip waterproof and moisture-proof, in addition, the application of submarine cable is also an important part of 2166 can be competent. The double-wrapped submarine cables combined with the J20 can withstand extreme water pressure and insulation, in accordance with the limits of Directive (EU)2015/863, as amended in Annex II of the EU RoHS Directive 2011/65/EU.