Glaziers' Putty, Caulking Compounds, Mastics & Painters' Fillings

Yes. Certain silicone-based sealants and related products from specific countries have been subject to antidumping and countervailing duty investigations in the US. Importers should check the current scope of any active orders with CBP and the Department of Commerce before importing, as scope rulings can be product-specific and origin-specific.

Glaziers' putty is a traditional linseed-oil-and-whiting compound used to bed and seal glass panes in wooden frames, while caulking compounds are flexible sealants—typically polymer-based—applied to joints and gaps in construction. Both fall within SITC 53354, but at the HTS level they may be directed to different subheadings based on composition and form. The product's SDS and technical data sheet, confirming binder type and intended application, are the primary classification support documents.