ACDelco Medium Body Seam-Sealing Compound 10.1 oz — GM OE, Paint-Safe Flexible Sealant

ACDelco Medium Body Seam-Sealing Compound is a professional-grade, paint-safe joint sealer that provides long-lasting, flexible protection for automotive seams and joints.

Designed for automotive repair shops and experienced technicians, this ACDelco GM Original Equipment compound bonds to most substrates, resists weathering and common automotive fluids, and cures quickly for efficient refinishing. It fills gaps, seals body seams, and adheres in both horizontal and vertical applications while remaining flexible and non-sagging. Note: this product is intended for professional use only and not for retail sale.

How quickly can I paint over the seam-sealer?

The compound skins over rapidly and accepts paint soon after curing, enabling fast turnaround on repair jobs. Under typical shop conditions it becomes paintable in about 60 minutes, reducing downtime between sealing and finishing.

• Skins over quickly—paintable roughly 60 minutes after application
• Suited for common shop temperatures and procedures
• Allows sanding and finishing without long wait times

Will this product hold up to salt, gasoline, and outdoor weather?

Yes — the formula resists weathering, oxidation, salt water, gasoline, and many solvents, maintaining a durable seal in harsh conditions. Its long-term flexibility prevents cracking and preserves the integrity of the seam under vibration and temperature changes.

• Water- and salt-resistant for coastal and winter use
• Resists gasoline and many automotive solvents
• Permanent flexibility prevents cracking or shrinking over time

Can I apply it to painted surfaces and in vertical joints?

This seam-sealing compound is safe to use on automotive paint and can be dispensed with a standard caulking gun for both vertical and horizontal applications. The non-sagging consistency holds its shape in vertical joints while providing smooth coverage that can be finished to match surrounding panels.

• Paint-safe formula for refinishing workflows
• Medium body consistency applies cleanly in vertical and horizontal seams
• Non-staining finish compatible with subsequent coatings

Are there any application or safety constraints I should know?

Follow professional shop practices: avoid applying near extreme heat sources such as catalytic converters and mufflers, and use appropriate personal protective equipment. Because this product is supplied for professional use only, ensure technicians are trained in surface preparation and application to achieve optimal adhesion and finish.

• Not recommended for use near catalytic converters or mufflers
• Intended for professional technicians; not for retail consumer use
• Use standard caulking gun; prepare surfaces per shop procedures

Who is this for? Automotive collision and body repair shops, experienced vehicle restorers, and professional mechanics who need a reliable, paint-safe seam and joint sealer that cures quickly and stands up to fuel, salt, and weather. If you require a non-sagging, flexible compound for sealing seams prior to repainting, and you are equipped to follow professional application and safety practices, the ACDelco GM Original Equipment 10-2013 Medium Body Seam-Sealing Compound is designed to meet those needs.