Mastics: — Other
N357206 · 2026-01-14 — The tariff classification of Engine Flange Sealants from Germany
The products are silicone-based, non-corrosive sealing compounds designed for use in engine flange sealing and industrial machinery applications. They are used to form flexible, oil-resistant gaskets between metal surfaces in engines and industrial equipment. These products are not designed for use as consumer adhesives and are not intended for household or retail consumer applications. Their principal use is in industrial maintenance, repair, and overhaul (MRO) operations, including automotive engines, agricultural machinery, and industrial equipment. The applicable subheading for the Engine…
N329169 · 2022-11-16 — The tariff classification of SILCOR® 900HA Part A & Part B from Belgium
Your submission describes the subject product as a two-component, hand-applied liquid waterproofing system designed for use as a fully adhered waterproofing layer on new and existing elevated structural decks. You indicate that SILCOR® 900HA Part A & Part B are imported and intended to be used together, they cannot be used independently. The product’s composition includes polyamine resin, polyalcohol, and other substances. The applicable subheading for SILCOR® 900HA Part A & Part B will be 3214.10.0020, Harmonized Tariff Schedule of the United States, (HTSUS), which provides for: Glaziers’…
N324403 · 2022-03-07 — The tariff classification of Teroson PU8599 Adhesive Sealant from Germany
Your submission describes Teroson PU8599 Adhesive Sealant as a direct glazing adhesive specifically designed for attaching windscreens and other glass screens to a frame of an automobile. It is a Polyurethane based adhesive that is free of PVC and solvents, which requires heating for proper application. The subject product is applied using an air driven dispenser gun to apply a bead around a frame of an automobile and attach the glass. Your submission and additional internet research indicate that this product is a pasty, viscous substance, which is applied in a thick bead to form a seal and…
N323510 · 2022-01-27 — The tariff classification and country of origin of Silicone Sealants from China
Your submission describes two types of sealants. The first type is identified as “HT906Z PV Module Sealant,” intended to be used for sealing PV module frames by adhering to typical PV substrates, including anodized aluminum, PPO, glass, and TPT/TPE series back sheets. The second type of sealant is identified as “5299W-S Two-component Silicone Potting,” intended to be used for sealing solar photovoltaic module junction boxes, electrical components, and electronic components, which require waterproof insulation and heat conduction. In your submission, you suggest classification in 3214.10.10;…
N320543 · 2021-07-27 — Eligibility for duty-free treatment under subheading 9817.00.96, Harmonized Tariff Schedule of the United States (HTSUS), of a “Ostomy Appliance Belt” and “Stomahesive Paste”
00.96, HTSUS, of a “Ostomy Appliance Belt” and “Stomahesive Paste.” You state that an ostomy is a surgical procedure in the abdomen where the intestine is brought up on to the surface of the skin and sutured in place to form a stoma (opening). This allows bodily waste to pass through the surgically created stoma into a prosthetic known as a ‘pouch’ or ‘ostomy bag’ on the outside of the body. An ostomy procedure is essential for colorectal cancer, bladder cancer, Crohn’s disease, ulcerative colitis, birth defects, spinal cord injuries, and other intestinal or urinary medical conditions. For…
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