4200 Fast Cure White - 3 oz.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
3M™ Marine Adhesive/Sealant Fast Cure 4200 (White) is a one-part general purpose polyurethane that chemically reacts with moisture to create flexible bonds and weather-resistant seals. It’s paintable and sandable for finishing, and it’s designed for marine applications above or below the waterline where disassembly may be desired.
Key Features
- One-part polyurethane sealant/adhesive that chemically reacts with moisture
- Flexible bonds with good adhesion to common marine substrates
- Paintable and sandable for easy finishing
- Helps form watertight, weather-resistant seals on joints and marine hardware above or below the waterline
- Fast cure for rapid results (tack-free in about 1 hour; typically cures in about 24 hours)
Intended Use
- Marine sealants and adhesives for bonding/sealing jobs
- Sealing joints and marine hardware applications (above or below the waterline)
- Projects using substrates such as wood, fiberglass, gelcoat, and compatible metals/plastics
Product Details
- Product: 4200 Fast Cure White - 3 oz.
- Brand: 3M
- Part number / SKU: 71-05260
- Color: White
- Container size: 3 fl oz (US) (88.7 ml)
- Adhesive type: Polyurethane
- Tack-free time: about 90 minutes
- Typical cure time: about 24 hours
- Product barcode (variant): 51135052600 (as listed)
- Package/quantity note: This listing is for the 3 oz tube (single item).
Parts Desk Insights
Best Use Case: Use for marine bonding and sealing where you want a flexible, weather-resistant polyurethane sealant with the ability to sand and paint after cure—such as sealing joints or mounting hardware on boats.
Common Issues: For best results, prep and clean mating surfaces before application. Because this is a fast-cure polyurethane, moisture-triggered curing can progress quickly—work efficiently, ensure proper squeeze-out/coverage at the joint, and verify compatibility on any plastics before committing the job.
Related Products & Accessories
Browse related Caulks, Sealants & Adhesives to complete the installation.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.