No matter the condition of your 1978 Bonneville, OPGI has the Sealers, Gasket Makers & Glues you need to boost performance and get you back on the road. We currently carry four Sealers, Gasket Makers & Glues to choose from for your 1978 Bonneville, and our Price Match Guaranteed prices range from as little as $16.89 up to $23.99. OPGI offers 3M plus one other trusted brands of Sealers, Gasket Makers & Glues for your 1978 Bonneville, to help you find quality parts you can rely on. With OPGI's 45-day return policy and thousands of customer reviews, you can shop with the utmost confidence. Enjoy parts delivered directly to your home, or visit our sunny Southern California Showroom & Warehouse to check out our Sealers, Gasket Makers & Glues in person.