Collinite Fleetcut Polishing Compound 631

Key Features

• Compound and Polish in One – Cuts and refines in a single product for maximum efficiency
• Engineered Nano Abrasives – Fast cutting action with a clean, mirror-quality finish
• Removes Moderate to Heavy Defects – Oxidation, minor scratches, swirls, stains, and compound haze
• Removes Sanding Marks Above 1,000 Grit – Ideal for restoring heavily neglected fibreglass
• Nourishing Oils Formula – Conditions the surface while correcting for a smooth, rich result
• Improves Wax Bond and Durability – Prepares the surface for easy application of Collinite 925
• Rotary and DA Compatible – Use with rotary for heavy neglect, DA for mild neglect and maintenance
• Exclusively for Marine Detailing – Fibreglass and gel coat surfaces only
• Not for Anodised Aluminium, Clear Coat Paint, Plastic, or Glass
• Coverage – 250 to 500 sq ft per bottle
• Size – 16 fl oz
• Made in USA

Product Description

Collinite Fleetcut Polishing Compound 631 is a purpose-built marine compound and polish designed exclusively for fibreglass and gel coat surfaces. Its engineered nano abrasive formula combined with nourishing oils cuts quickly through moderate to heavy surface defects – including oxidation, minor scratches, swirl marks, stains, and compound haze – while leaving behind a smooth, mirror-quality finish. By combining compounding and polishing into a single product, the 631 saves significant time and effort on marine restoration jobs of all sizes.

Compound and Polish in One Step

The 631 eliminates the need for separate compounding and polishing stages on fibreglass and gel coat. Whether you are dealing with heavy seasonal neglect that requires aggressive correction with a rotary polisher, or performing light maintenance with a DA polisher, the Fleetcut adapts to both applications with outstanding results. It removes sanding marks above 1,000 grit, making it the go-to choice for restoring heavily weathered and oxidised marine surfaces back to their original clarity and gloss.

Prepares the Surface for Wax Coating

Beyond correction, Collinite 631 actively prepares the gel coat surface for follow-up wax protection. Its nano abrasive and nourishing oil formula leaves behind an optimally smooth surface that improves the bond, spread, and long-term durability of Collinite Fiberglass Boat Wax 925 – making it the ideal first step in the Collinite marine detailing system.

How to Use

Always test in a small inconspicuous area first to ensure the desired result on your specific surface. Apply a small amount of No. 631 to the pad and work across a 2×2 ft section at a time. For heavy neglect and oxidation, use with a rotary polisher for maximum cutting power. For mild neglect and seasonal maintenance, use with a DA polisher for a more refined result. Remove product residue with a medium-nap microfiber towel such as the GreenZ Smart Edgeless Polish Microfiber Towel to reveal the finished surface.

Download the No. 631 Machine Application Guide here

Not designed for use on anodised aluminium, clear coat paint, plastic, or glass.

Technical Specifications