3M™ Strip-Caulk is a soft butyl rubber caulking material that quickly and permanently fills all types of seams, joints and openings – long-lasting auto body maintenance and repair in much less time.
With its durable butyl rubber construction and permanently-pliable formula, our 3M™ Strip-Caulk is ideal for filling non-visible automotive joints, seams, voids and gaps. This thumb-grade seam sealer arrives ready to install without mixing, spraying or tools. It thumbs in quickly and smooths with a fingertip. And its high heat resistance also makes it suitable for applications including engine compartment seams and firewalls. 3M™ Strip-Caulk never hardens or becomes brittle, so seams stay smooth and gaps stay filled. It is also non-shrinking, which makes it excellent as a sealer for plugging holes and preventing noise and moisture penetration. It arrives in a box in neat 1-foot lengths, ready to use. It installs in minutes without tools. It’s great as a seam and gap filler as well as a sealer for noise and moisture, even in high-temperature spaces. And it keeps performing, reducing rework and saving time and money.