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3M Marine Coarse Compound 63997 (Perfect-It Gelcoat Heavy Cutting) – 2L / 3.3kg

£57.20

3M Marine Coarse Compound 63997 (Perfect-It Gelcoat Heavy Cutting) – 2L / 3.3kg

Get professional-tier restoration results with the fastest-cutting liquid compound engineered by 3M specifically for marine applications. This heavy-duty formulation tackles deep surface defects, heavy weathering, and deep oxidation on gelcoat surfaces while leaving a high-gloss finish

Technical Specifications & Formulation Advantages

  • Fast-Cutting Mineral Blend: Formulated with premium aluminium oxide abrasives to deliver an incredibly rapid rate of cut.
  • Defect Elimination: Aggressive enough to effortlessly eliminate heavy chalking, weathering, scuff marks, and sanding scratches rated P600/P800 or finer.
  • Extended Wet-Time Technology: Stays wet longer on the panel, minimizing material usage and preventing premature dry-out.
  • Low Dust, Easy Cleanup: Engineered to produce minimal dusting or slinging, reducing cleanup time significantly. [
  • Weather Optimized: Performs reliably even in warm climates without immediate caking or pad clogging.
  • Large Capacity Packaging: Supplied in a bulk 2-Litre bottle (3.3kg net weight), ideal for large hulls, multi-boat projects, or professional workshops.

Where and What It Can Be Used On
This compound is purpose-built for high-solid, non-silicone-sensitive finishes.
  • Marine Vessels: Perfect for fiberglass yacht hulls, speedboats, personal watercraft (jet skis), and commercial vessels.
  • Recreational Vehicles: Excellent for caravans, motorhomes, campervans, and trailers featuring a composite fiberglass or gelcoat outer shell.
  • Industrial Fiberglass / Composites: Highly effective on wind turbine blades, industrial composite mouldings, and architectural gelcoat fixtures.

Target Surface Defects:
  • Severe sun-induced oxidation, fading, and yellowing.
  • Heavy chalking and surface calcification.
  • Scratches from dock rub, fenders, or grit.P600 - P800 grit sand scratches following severe gelcoat repair.
  • Note: This product is designed specifically for gelcoat finishes and raw composites. It is not recommended for traditional automotive clear coats.

Recommended Application Guide
  • For the absolute best results, use a professional rotary buffer or dual-action polisher.
  • Surface Prep: Ensure the surface is thoroughly washed and free of loose dirt or salt spray.
  • Buffing Speed: Work at a tool speed between 1,200 to 2,000 RPM using 50% overlapping passes.
  • Pad Pairing: Best applied using a 3M Wool Compounding Pad or a heavy-cut foam pad.
  • Finishing Step: While it leaves a high gloss, it is recommended to step down to a fine polish (like 3M Light Cutting Polish) or seal immediately with 3M Perfect-It Boat Wax to lock in the shine and protect against future weathering.

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"We aim to deliver orders as quickly as possible"
Once an order is placed and paid for by 2pm, it is sent to our shop for dispatch. Orders placed after 2pm are sent the following business day. Once processed, most of our listings use a 2nd class Royal mail delivery service; however, this can vary depending on the chosen shipment method on check out.

"We want you to be 100% happy with your purchase"
Because of this, we offer a 60 day returns policy as a standard! If you change your mind, or the purchase is not suitable, please notify us to request a return. You have a duty to take reasonable care of the item(s) until we receive the item(s) back. Return posting costs will be at the expense of the buyer.

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