3M Cubitron™ II Marine Sanding Disc
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Get faster cutting and a more uniform finish with the 3M Cubitron™ II Marine Sanding Disc. Designed for demanding marine sanding tasks, it’s a convenient Hookit™-style disc for jobs like bottom paint removal, gelcoat repair, and blister repair.
Key Features
- Triangular shaped ceramic mineral technology helps deliver faster cutting performance
- Multi-hole pattern helps improve dust evacuation by allowing dust removal throughout the disc
- Convenient Hookit™ attachment system for quick, user-friendly disc changes
- Cutting edges continually get exposed as the disc wears, supporting consistent results over time
Intended Use
- Bottom paint removal
- Gelcoat repair sanding
- Blister repair sanding
- General marine surface fairing and prep (for coated surfaces)
Product Details
- Product name: 3M Cubitron™ II Marine Sanding Disc
- SKU: 71-31372
- Brand: 3M
- Variant barcode: 51131313729
- Disc type: sanding disc (Hookit™ attachment system)
- Performance claims noted in product text: cuts 30% faster than premium abrasives and lasts up to twice as long while delivering a finer, more uniform finish
- Applications called out in product text: bottom paint removal, gelcoat repair, and blister repair
- Weight (variant): 2948 grams
Parts Desk Insights
Best Use Case: Ideal when you want efficient cutting and improved dust control during marine sanding/fairing for coating and gelcoat repair work.
Common Issues: For best dust extraction and finish quality, ensure the disc is properly seated on the Hookit™ backing and keep vacuum airflow unobstructed. If you notice dust loading or reduced cut rate, confirm grade selection and replace the disc before the abrasive has fully worn down.
Related Products & Accessories
- Tools & Installation (browse collection) - Pair with compatible marine sanding tools and installation accessories.
- Anti-Corrosion Coatings (browse collection) - Explore related coatings and prep supplies for bottom work and repairs.
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.