Collection: Auto - Strip Caulk

Create a permanent, flexible barrier against water, air, and noise with our selection of Auto Strip Caulk components. At DIY Customs, we provide high-durability non-hardening butyl caulk strips, specialized "thumb grade" seam sealers, durable windshield ribbon sealants, and heavy-duty vibration-damping mastic designed for a perfect fit on firewall penetrations, door inner panels, and trunk seams. Whether you are seeking specialized black strip caulk for a factory-correct classic car restoration, outfitting your custom build with specialized sound-deadening gap fillers, or seeking specialized waterproof seals for taillight housings and HVAC boxes, our professional-grade sealing hardware offers the adhesion and flexibility you need at unbeatable prices. From specialized 1/4-inch round beads to direct-fit bulk rolls for large body shop projects, we carry the essential gear for every automotive sealing task. Don't see the specific bead diameter, temperature rating, or specialized gray or black finish for your application? Hit the live chat or call 412-882-8346—we can special order and drop-ship exactly what you are looking for directly to your doorstep!