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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3m 05205 3 Oz Black Marine Adhesive Sealant

Product ID: 272599832

Details

Brand
3M
Item dimensions L x W x H
36 x 124 x 224
Item weight
4.8 Ounces
Material
Polyurethane
Style
5200

⏳48h handling strength, 4-day full cure

⚓Permanent marine-grade bond

🌊Saltwater & weather resistant

Description

⚓ Seal your legacy with 3M’s toughest marine adhesive – don’t let your boat settle for less!

MULTI SURFACE MASTER - Ideal for deck housings, hull fittings, portholes & more – versatility that wins
WEATHERPROOF WARRIOR - Resists saltwater, UV, and harsh weather above & below waterline 🌊
STRESS ABSORBING FLEX - Elastomeric bond absorbs vibration, swelling & shock for lasting performance
GENEROUS WORKING WINDOW - Extended open time lets you perfect every application without rush ⏳
UNBREAKABLE MARINE SEAL - Permanently bonds wood, fiberglass & metal for ultimate durability ⚓

3M 05205 Marine Adhesive Sealant 5200 is a black polyurethane formula engineered for permanent, flexible, and waterproof bonds on marine substrates like wood, fiberglass, and metal. It withstands saltwater and weathering, cures fully in 4 days, and maintains strength under vibration and shock, making it the go-to sealant for professional-grade marine repairs and installations.

Specifications

ASIN	B000Y89JC8
Best Sellers Rank	#28,220 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #93 in Silicone Sealers
Brand Name	3M
Color	Black
Compatible Material	Fiberglass, Wood
Customer Reviews	4.5 4.5 out of 5 stars (6,347)
Global Trade Identification Number	00051135052051
Included Components	marine sealant
Item Dimensions	36 x 124 x 224 millimeters
Item Form	Liquid
Item Highlight	Permanent Bonding and Sealing for Boats and Marine Applications
Item Type Name	marine sealant
Item Weight	4.8 Ounces
Manufacturer	3M
Material Type	Polyurethane
Model	5200
Number of Items	1
Number of Packs	1
Part Number	051135052051
Style Name	5200
Surface Recommendation	Floor
UPC	051135052051
Unit Count	3 Milliliters
Water Resistance Level	Waterproof

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