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.
Cut faster and clean more efficiently with the 3M Cubitron™ II Marine Sanding Disc. Designed for marine finishing work, this Hookit™-attached disc uses precision-shaped ceramic mineral to help deliver a finer, more uniform finish on bottom paint and gelcoat-related repairs.
Key Features
- Precision-shaped ceramic mineral for fast cutting and consistent performance
- Multi-hole pattern helps improve dust extraction by letting a vacuum reach more of the disc surface area
- Hookit™ attachment system for convenient disc changes
- Triangular cutting grain design continuously exposes fresh cutting edges as the disc wears
Intended Use
- Bottom paint removal
- Gelcoat repair preparation
- Blister repair sanding
- General marine coating surface preparation and sanding tasks
Product Details
- Product name: 3M Cubitron™ II Marine Sanding Disc
- SKU: 71-31366
- Hookit™ attachment system (disc-ready sanding accessory)
- Grit/grade: 80+ (from product description and supported Cubitron II Marine disc grade info)
- Disc type: Cubitron™ II marine clean sanding disc technology (triangular shaped ceramic mineral)
- Package/units: 50 discs per carton (supported by 3M Cubitron II disc documentation for 31366 series)
- Barcode/UPC: 51131313668
- Weight (variant): 2114 GRAMS
Parts Desk Insights
Best Use Case: Best for marine coating prep and repair sanding where you want aggressive-but-controlled material removal alongside improved dust extraction using a compatible vacuum system.
Common Issues: For best results, ensure the disc is seated evenly on the mating Hookit sanding pad/attachment and that the vacuum is positioned to take advantage of the multi-hole extraction pattern. Worn or unevenly seated discs may reduce cut rate and finish uniformity.
Related Products & Accessories
- Tools & Installation - Browse sanding pads, vacuum adapters, and installation accessories that pair 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.