Fact Sheets
Fact Sheet: President Donald J. Trump Bolsters National Security and Strengthens U.S. Supply Chains by Imposing Tariffs on Polysilicon and its Derivatives
The White House
August 6, 2026
DEFENDING THE AMERICAN INDUSTRIAL BASE: Today, President Donald J. Trump signed a Proclamation to protect America’s polysilicon industry and supply chain from imports that threaten national security.
The Proclamation imposes a minimum import price program on imports of polysilicon and polysilicon derivatives to create a level playing field for American producers of these strategic goods.
The Proclamation imposes a 15% ad valorem tariff on derivative products that are downstream of polysilicon to encourage onshoring of these industries.
The Proclamation authorizes the Secretary of Commerce to establish an incentive program for companies that will invest in building, expanding, or refurbishing facilities that produce polysilicon and polysilicon derivatives. This program will ensure commercial viability of U.S. production of polysilicon and its derivatives and enhance employment opportunities for Americans.
The remedies will take effect 120 days after signing.
STRENGTHENING ECONOMIC AND NATIONAL SECURITY: President Trump’s polysilicon tariff program will protect the national security of the United States and its defense and defense-adjacent industrial base.
Polysilicon is a key building block for the semiconductor industry with important national defense and defense-adjacent uses.
For decades, foreign governments have dumped polysilicon and its derivatives into the U.S. market, eliminating U.S. producers and jobs.
The United States’ share of global polysilicon production capacity has fallen from 50 percent in 2005 to less than 2 percent in 2024.
BUILDING ON A RECORD OF SECURING CRITICAL INDUSTRIES: President Trump has long recognized that America’s national security and economic strength depend on rebuilding key sectors of our industrial base.
In his first term, President Trump revolutionized international trade by using Section 232 to address decades of short-sighted, globalist trade policies that hollowed out our domestic steel and aluminum industries, impairing our national security.
In his first term, President Trump imposed groundbreaking global safeguard tariffs on imports of solar cells and modules, pursuant to Section 201 of the Trade Act of 1974.
Since returning to office, President Trump has continued taking actions under Section 232 to protect and strengthen domestic manufacturing critical to our national and economic security, including imposing and strengthening tariffs on key goods such as steel, aluminum, copper, trucks, automobiles, timber, lumber, and pharmaceuticals.
Through negotiations with foreign trading partners and the strategic use of tariffs, President Trump has secured trillions in private and foreign investment to bring American jobs and manufacturing back to the United States while diversifying global supply chains and reducing dependence on adversarial nations.
