3M 06564 Marine Adhesive Sealant 4200FC Fast Cure Black 10 oz Cartridge | Strong Serviceable Polyurethane | Rub Rails, Stern Joints, Deck & Through-Hull Fittings | Above & Below Waterline

3M 06564 Marine Adhesive Sealant 4200FC Fast Cure Black 10 oz Cartridge — Strong Serviceable One-Component Moisture-Curing Polyurethane | Rub Rails, Stern Joints, Deck & Through-Hull Fittings | Above & Below Waterline

3M Marine Adhesive Sealant 4200FC Fast Cure Black is a one-component, strong, moisture-curing, gap-filling polyurethane adhesive sealant that delivers strong, flexible bonds to aluminum, wood, gel coat, and fiberglass. Forms watertight, weather-resistant seals above and below the waterline. Flexible cured bond dissipates stress from shock, vibration, swelling, and shrinking. Serviceable — bonds can be disassembled for maintenance and repair. Fast Cure formula: tack free in 1 hour, full cure in approximately 24 hours. Black. 10 oz cartridge for standard caulking gun.

Part Specifications

• Part Number: 3M-06564
• Product Line: 3M Marine Adhesive Sealant 4200FC Fast Cure
• Color: Black
• Size: 10 oz cartridge (requires standard caulking gun)
• Chemistry: One-component, moisture-curing polyurethane
• Bond Strength: Strong — serviceable (can be disassembled for maintenance and repair)
• Substrates: Aluminum, wood, gel coat, fiberglass
• Application: Above and below the waterline
• Cured Properties: Flexible, watertight, weather-resistant seal; stress dissipation from shock, vibration, swelling, and shrinking
• Tack Free: 1 hour
• Full Cure Time: Approximately 24 hours
• Typical Applications: Black rub rails, stern joints, deck fittings, through-hull fittings, access plates, and hardware installations requiring black color match
• Also Available: 3M 06560 Marine Adhesive Sealant 4200FC White 10 oz Cartridge | 3M 05260 Marine Adhesive Sealant 4200FC White 3 oz Squeeze Tube

Why Black — Color Match Applications for 4200FC

The 06564 is the same 4200FC Fast Cure polyurethane formula as the white cartridge (06560) and white squeeze tube (05260), in black for applications where color match is required or preferred:

• Black rub rail systems: Many boats use black vinyl or rubber rub rails where the sealant bead at the rail-to-hull joint is visible. A white or gray sealant bead is conspicuous against black rub rail material; black 4200FC blends into the joint for a cleaner finished appearance
• Black hardware installations: Black cleats, chocks, fairleads, and deck hardware are increasingly common on modern boat designs. Black sealant at the fastener/deck interface is less visible than white on black-finished hardware
• Below-waterline through-hulls on dark hulls: On dark-hulled boats, black sealant at through-hull fitting flanges is less visually disruptive than white against a dark hull color
• Structural appearance seams: Any joint or seam on a black or dark-colored component where the sealant bead will remain exposed in the finished installation
• Formula is identical to white 4200FC: Bond strength, cure time, substrates, serviceability, and above/below waterline rating are the same as 06560 White and 05260 White 3 oz — only the color differs

4200FC vs 4000 UV vs 5200 — Choosing the Right 3M Marine Polyurethane Sealant

• 3M Marine Adhesive Sealant 4200FC (this product — 3M-06564 Black 10 oz | 3M-06560 White 10 oz | 3M-05260 White 3 oz): Strong, serviceable — bonds can be disassembled for maintenance. Fast Cure: tack free 1 hr, full cure ~24 hrs. Best for through-hulls, deck hardware, rub rails, and fittings requiring a strong serviceable hold that may need future removal.
• 3M Marine Adhesive Sealant 4000 UV Fast Cure (3M-05280 White 3 oz | 3M-06580 White 10 oz): Medium strength, serviceable. Excellent UV resistance for UV-exposed above-waterline applications. Easier disassembly than 4200FC.
• 3M Marine Adhesive Sealant 5200 (3M-05203 White 3 oz | 3M-05220 Fast Cure White 3 oz): Permanent bond — separation requires cutting or grinding. For structural bonds that will never be disassembled.

10 oz Cartridge — Size & Format

• Requires a standard 10 oz caulking gun (not included)
• Higher volume than the 3 oz squeeze tube (05260) — suited for full rub rail runs, multiple fittings in a single session, and production installations where the larger quantity and lower cost-per-oz make sense
• Cut the cartridge nozzle at a 45° angle to the desired bead size; puncture the inner foil seal before use
• After use, leave the nozzle cap in place or cover the nozzle opening to slow skin-over of the remaining product — partially used cartridges can often be used again if stored properly

Application Notes

• Surfaces must be clean, dry, and free of grease, oil, wax, and loose material; clean with acetone or isopropyl alcohol and allow to dry before applying
• Apply to one or both surfaces and press together firmly; tool the exposed bead or fillet within the tack-free window (tack free 1 hour)
• Moisture initiates cure — higher humidity and warmer temperatures accelerate surface cure
• Tack free in 1 hour; full cure approximately 24 hours — do not stress the joint or immerse below the waterline until fully cured
• Uncured product: clean up with acetone or MEK. Cured product: must be cut or abraded for removal
• Wear gloves — uncured polyurethane is difficult to remove from skin and clothing; black pigment increases staining risk on light-colored surfaces

Additional Information

• Vendor: 3M
• SKU: 3M-06564
• Product Type: Boat & Engine Maintenance / Adhesives & Sealants
• Color: Black
• Size: 10 oz cartridge
• Country of Origin: USA
• HS Code: 3506.10 (products suitable for use as glues or adhesives, put up for retail sale — verify for your import classification)

Frequently Asked Questions

Q: Is the black 4200FC (06564) the same formula as the white versions?
A: Yes — the 06564 Black is the same 4200FC Fast Cure polyurethane formula as the 06560 White 10 oz and 05260 White 3 oz. Bond strength, cure time, substrates, serviceability, and waterline rating are identical — only the color differs.

Q: What is the difference between 4200FC and 5200?
A: 4200FC is strong and serviceable — joints can be disassembled with reasonable effort for maintenance and repair. 5200 is permanent — separation after full cure requires cutting or grinding and damages bonded surfaces. Use 4200FC for hardware that may need future removal; use 5200 only for permanent structural bonds.

Q: When should I use black vs white 4200FC?
A: Choose black (06564) when the sealant bead will be visible in the finished installation against a black or dark-colored substrate — black rub rails, black hardware, dark-hulled through-hulls. Choose white (06560 or 05260) for white or light-colored substrates, or any installation where the sealant bead will be covered or is not visible.

Q: Does the 10 oz cartridge require a caulking gun?
A: Yes — a standard 10 oz caulking gun is required. The gun is not included. If you need to apply small quantities without a gun, the 3M 05260 White 3 oz squeeze tube does not require a gun (white only — no black squeeze tube available in this size).

Q: Can 4200FC Black be used below the waterline?
A: Yes — rated for above and below the waterline. Allow full cure (approximately 24 hours) before immersing below the waterline. Do not stress the joint before full cure.