High-Performance Silicone Mastic
Neutral-cure silicone mastic for expansion joints in commercial buildings, neutral odor. Falls under HTS 3214.10.00.20 as other mastics for surfacing. High elasticity for seismic zones.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If silicones in primary forms
Uncompounded silicone polymers under Chapter 39.
If adhesive strength dominates
Adhesive mastics reclassify to Chapter 35.
Not sure which classification is right?
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Import Tips & Compliance
• ASTM C920 certification required for structural silicone claims
• VOC compliance via CARB or EPA for indoor air quality
• Distinguish cure type (acetic vs neutral) in docs for proper class
Related Products under HTS 3214.10.00.20
Silicone-Based Glazier's Putty
A mastic compound used by glaziers to seal glass panes in window frames, providing waterproofing and adhesion. It falls under HTS 3214.10.00.20 as a glazier's putty, a non-refractory mastic for sealing purposes. This product is distinct from bituminous mastics excluded by chapter notes.
Polyurethane Grafting Putty
A resin cement mastic applied to seal grafts on trees or plants, promoting healing and preventing infection. Classified under HTS 3214.10.00.20 as grafting putty, a specialized mastic. It adheres to chapter provisions for nonrefractory surfacing and sealing compounds.
Acrylic Caulking Compound
A paintable latex-based mastic for sealing gaps in walls, windows, and doors in construction. It is categorized under HTS 3214.10.00.20 as a caulking compound mastic. This nonrefractory preparation is used for indoor and facade surfacing.
Butyl Rubber Resin Cement
A mastic used in roofing and siding applications for flexible sealing against weather. Falls under HTS 3214.10.00.20 as a resin cement mastic, excluded from bituminous types. Provides durable, non-hardening seals for building envelopes.
Painter's Non-Sag Mastic Filler
A thick mastic for filling cracks and joints in drywall before painting, remaining in place without sagging. Classified in HTS 3214.10.00.20 as other mastics akin to painters' fillings. Used for indoor wall and ceiling surfacing preparations.
Marine-Grade Caulking Mastic
UV-resistant mastic for sealing boat decks and hull joints, flexible in saltwater environments. Under HTS 3214.10.00.20 as caulking compound mastic. Nonrefractory formula for surfacing marine structures.