Does the 10oz. Silicone require purchasing a special caulk gun? I was previously shipped tubes made of metal with pull tap opening like on a soup can

I was concerned as well but it has an internal plastic follower cup that a traditional caulking gun presses against: Similar to the traditional caulk tube. The additional metal seal helps to prolong the storage of the adhesive sealant.

Has anyone tried mixing a color pigment into the glue before application? Will this effect the cure?

I have not and can only advise you give 3M support line a call and ask them and if you can I am sure they will tell you which coloring to use. I would not just mix in any color you don't know how the glue will react to it. Give 3M a call I am sure they will be glad to help.

My kitty put a couple of pin hole sized punctures in my scuba bcd, causing a small, slow leak. will this patch it?

Yes it will. Allow five days to cure. Don’t use the fast cure.

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Description

⚓ Seal your legacy with 3M Marine 5200 — the bond that never lets go.

AMPLE WORKING TIME - Generous open time lets you perfect your application before it sets, with handling strength in just 48 hours.
WEATHERPROOF WARRIOR - Resists harsh saltwater and extreme weather both above and below the waterline—no compromises.
FLEXES WITH THE WAVES - Elastomeric formula absorbs vibration, swelling, shrinking, and shock for long-lasting durability.
VERSATILE APPLICATION - Ideal for deck housings, hull fittings, portholes, and more—engineered for every marine challenge.
UNBREAKABLE MARINE SEAL - Creates a permanent, watertight bond on wood, fiberglass, and metal—your boat’s new best friend.

3M Marine 5200 Adhesive Sealant is a black, polyurethane-based marine-grade sealant designed for permanent, flexible, and waterproof bonding on wood, fiberglass, and metal surfaces. It withstands saltwater, weathering, and mechanical stresses, offering a 48-hour handling time and versatile use across marine applications such as hull fittings, deck housings, and portholes. Trusted by professionals for unmatched durability and performance in harsh marine environments.

Specifications

Material	Plastic
Brand	3M
Style	Compact
Item Weight	0.3 Pounds
Item dimensions L x W x H	36 x 124 x 224 Millimeters
Water Resistance Level	Waterproof
Item Form	Ounces
UPC	051135052051
Net Quantity	3.0 Fluid Ounces
Global Trade Identification Number	00051135052051
Number of Items	1
Colour	Black
Surface Recommendation	Floor, Wall
Manufacturer	3M
Country of Origin	USA
Model number	5200
Special Feature	Strong
Item Weight	136 g
Product Dimensions	3.56 x 12.45 x 22.35 cm; 136.08 g
Item model number	5200
Item Height	8.8 Inches
Item Width	4.9 Inches
Included Components	marine sealant
Are batteries included?	No
Lithium battery voltage	0.1 Nanovolts

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