Oven Mitt (silicone)

Material Composition Assumptions

The carbon footprint assessment for silicone oven mitts assumes a typical product weighing approximately 300 grams with the following material composition:

• Polydimethylsiloxane (PDMS) polymer: 240g (80%) - the primary structural material providing heat resistance and flexibility
• Silica and silicon dioxide fillers: 45g (15%) - reinforcing agents that enhance durability and heat tolerance
• Methyl chloride processing residuals: 9g (3%) - chemical refining agents used during polymerization
• Carbon-based materials from production: 3g (1%) - coal, coke, or biocarbon inputs from silicon smelting
• Methanol processing residuals: 3g (1%) - organic solvents used in chemical synthesis

Manufacturing Geography

Silicone oven mitt production concentrates primarily in East Asian industrial centers, particularly China, South Korea, and Japan, which collectively account for approximately 70% of global silicone manufacturing capacity. These regions benefit from established petrochemical infrastructure, proximity to silicon metal smelting facilities, and cost-effective manufacturing ecosystems. The carbon intensity varies significantly based on local electricity grids, with China’s coal-heavy grid averaging 531 kgCO2e/MWh compared to more renewable-intensive grids in hydropower-rich regions.

Regional Variation

Manufacturing Region	Grid Intensity	Estimated CCI Score	Adjustment vs Default
China (coal-heavy grid)	531 kgCO2e/MWh	52	Baseline
South Korea	467 kgCO2e/MWh	47	-10%
Norway (hydropower)	24 kgCO2e/MWh	36	-31%
Germany	348 kgCO2e/MWh	44	-15%
Japan	446 kgCO2e/MWh	46	-12%

Provenance Override Guidance

Suppliers can provide the following documentation to override the default CCI score with product-specific data:

1. Silicon metal smelting energy source verification, including renewable energy certificates or power purchase agreements that demonstrate low-carbon electricity usage during the energy-intensive smelting process.

2. Polymerization facility energy audit data showing actual electricity consumption and grid carbon intensity at the specific manufacturing location where silicone polymerization occurs.

3. Transportation logistics documentation detailing shipping distances, modes of transport, and fuel consumption from silicon production through final product distribution.

4. Raw material sourcing certificates indicating the geographic origin of silica mining operations and associated extraction energy requirements.

5. Waste heat recovery system specifications demonstrating energy efficiency improvements beyond industry standard practices in furnace operations.

Methodology Notes

• The CCI score represents cradle-to-gate emissions including raw material extraction, processing, and manufacturing through factory completion, plus estimated end-of-life disposal impacts due to non-biodegradable material properties.
• Scope 2 emissions dominate due to electricity-intensive silicon smelting and polymerization processes, while Scope 3 captures significant upstream silica mining and downstream disposal persistence.
• The functional unit assumes a single oven mitt with average dimensions and heat resistance ratings typical of consumer kitchen products.
• The assessment excludes potential carbon benefits from extended product lifespan compared to alternative materials, focusing only on production and disposal impacts.
• Data gaps exist for emerging bio-based silicone alternatives and advanced recycling technologies that may reduce future carbon intensity.