Delta Rim Composites’ Yellowbead washers are made of silicone rubber. Because this material is more elastic than neoprene (which is what traditional washers are made of), valves require less tightening to seal. Silicone is also less likely to harden over time, and it’s tear-resistant, so the washers will work even on moderately damaged valve seats. They come in six faucet sizes and one hose size. A six-pack costs about $3. Delta Rim Composites, 877/465-7901, yellowbead.com.