1.Material Differences Lead to Significant Performance Gaps: Taking the ase of Beijing homeowner Ms. Wang as an example,PVC seals have a lifespan over 50% shorter than EPDM, resulting in nearly a thousand yuan in additional heating costs annually.
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2. Market Chaos Is Widespread: According to research by Doors and Windows Association, 72% of households face material misjudgment when selecting seals.
3. Hidden Functions Have Major Impacts: As the "invisible guardian" of doors, windows, automobiles, and appliances, seals directly influence core performance aspects such as sound insulation, thermal insulation, and waterproofing.
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4. Long-Term Economic Differences Are Significant: High-quality EPDM seals can last 15–20 years, while inferior products last only 2–3 years, leading to a long-term usage cost difference of over 10 times.
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