It says it's paintable, but I have not tried to paint it.

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Dynatron 550 Auto Seam Sealer Grey Caulk - 12 oz.

Dynatron 550 Auto Seam Sealer Grey Caulk - 12 oz.

Q: What is the recommended ambient temperature range for applying this seam sealer?

I use it between 50 and 90. Near 90 it almost skins too fast. I smooth it out with mineral spirits on a finger.

Q: Can I fill a vertical seam without it running? Is it thick enough to stay in place on a vertical panel?

Absolutely, vertical application can be applied. I did it.

Product ID: 374759731

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Details

Colour
Grey
Brand
3M
Item Weight
12 Ounces
Liquid Volume
12 Fluid
Full Cure Time
24 Hours

⏱️Fast-skinning in minutes

🛡️Non-sagging waterproof seal

🧘‍♂️Permanently elastic for lasting flexibility

Description

🛠️ Seal smart, seal fast — the pro’s choice for flawless finishes!

RAPID DRYING POWER - Get to work faster with a fast-skinning formula that saves you time and hassle.
ENDURING FLEXIBILITY - Permanently elastic sealant that moves with your surfaces—no cracks, no compromises.
FLAWLESS APPLICATION - Non-sagging paste ensures a clean, professional finish every time, even on vertical surfaces.
WATERPROOF CONFIDENCE - Keep moisture out with a durable, waterproof seal that stands up to the elements.
BUILT FOR METAL MASTERY - Specifically designed for metal surfaces, delivering superior adhesion and protection.

The Dynatron 550 Auto Seam Sealer Grey Caulk by 3M is a 12 oz. fast-skinning, permanently elastic, and non-sagging sealant designed for metal surfaces. Waterproof and durable, it cures fully in 24 hours, providing a flexible, professional-grade seal that resists cracking and sagging. Made in the USA, this paste-form caulk is ideal for professionals seeking reliable, long-lasting seam sealing.

Specifications

Colour	Grey
Brand	3M
Item Weight	12 Ounces
Liquid Volume	12 Fluid Ounces
Full Cure Time	24 Hours
Item Form	Paste
Surface Recommendation	Metal
Water Resistance Level	Waterproof
Number of Items	1
Manufacturer	3M
UPC	076308005504
Global Trade Identification Number	00076308005504
Net Quantity	12.0 gram
Material	Rubber Silicone
Model	Dynatron 550 Auto Seam Sealer Grey Caulk - 12 oz.
Product Dimensions	12.7 x 12.7 x 25.4 cm; 340.19 g
Item model number	550
Manufacturer Part Number	550
Volume	12 Fluid Ounces
Assembly Required	No
Country of Origin	USA
Item Weight	340 g

Have a Question? See What Others Asked

Is this safe to apply to bare metal or should the surface be primed first?

What is the recommended ambient temperature range for applying this seam sealer?

is it paintable?

Can I fill a vertical seam without it running? Is it thick enough to stay in place on a vertical panel?

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