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 fast, controlled sanding performance for marine prep and coating work with the 3M Cubitron™ II Marine Sanding Disc. Built with precision-shaped ceramic mineral and a dust-extraction friendly hole pattern, it’s designed to help you remove bottom paint and prep surfaces for repairs with a cleaner finish.
Key Features
- Precision-shaped triangular ceramic mineral grain designed to cut faster and last longer than conventional ceramic abrasives (as stated by the manufacturer)
- Multi-hole pattern helps dust extraction by allowing vacuum to reach virtually every part of the disc surface (as described)
- Cutting edges continually exposed as the disc wears to help maintain consistent cutting action
- Convenient Hookit™ hook-and-loop attachment system for easier disc changes
- Applications include bottom paint removal, gelcoat repair, and blister repair (as stated)
Intended Use
- Marine sanding and coating prep
- Bottom paint removal
- Gelcoat repair sanding
- Blister repair surface preparation
- General finish prep using Hookit™ compatible hook-and-loop sanding systems
Product Details
- Brand/Line: 3M Cubitron™ II
- Product type/category: Bottom Paint (per catalog/category labeling)
- Attachment system: Hookit™ (hook-and-loop)
- SKU: 71-31373
- Barcode: 51131313736
- Variant weight: 2068 grams (per variant)
- Product title: 3M Cubitron™ II Marine Sanding Disc
- Manufacturer-described performance and intended applications: fast cutting, longer life, and use for bottom paint removal, gelcoat repair, and blister repair
Parts Desk Insights
Best Use Case: Use for marine coating work where you want efficient sanding with strong dust extraction. The multi-hole pattern and Hookit™ attachment make it well-suited to orbital sanding/repair workflows where cleanliness and controlled finishing matter.
Common Issues: For best results, ensure the Hookit™ backing pad and mating surface are clean and seated flat—worn or mismatched Velcro can reduce holding strength and lead to premature wear. Also keep dust extraction running and aligned; if the vacuum isn’t effectively connected, the disc may load faster and reduce cut efficiency.
Related Products & Accessories
- Tools & Installation - Browse sanding and installation tools compatible with Hookit™-style disc systems.
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.