Koch Chemie Gelcoat Ultra Heavy Cut
Koch Chemie Gelcoat Ultra Heavy Cut for Severe Oxidation | Charleston, SC
Gelcoat Ultra Heavy Cut is the highly abrasive machine polish for very heavily weathered, grayed, and stressed gelcoats and marine paints. When standard Heavy Cut isn’t enough on neglected Lowcountry hulls, Ultra Heavy Cut is the aggressive prep step before stepping down the Koch gelcoat system.
Features / Why Pros Use It
- Highly abrasive cut for extreme oxidation and grayed gelcoat
- Also positioned by Koch for demanding prep on heavily stressed marine paint
- Rotary or DA with Heavy Cut Pad / short lambswool / twist wool
- Silicone-conscious restoration workflows—follow with finer gelcoat polishes
How to Use
- Shake well; apply ~5 pea-sized drops to Heavy Cut or wool pad
- Work methodically; wipe and evaluate before moving to Fine/Micro/Finish
- Do not chase perfection in one pad—step down abrasives for clarity
- Avoid hot gelcoat; protect product from frost and heat
Shop at Marine Detail Supply Charleston
Lowcountry boat detailers, yacht crews and owners can pick up the Koch Chemie Marine line at our North Charleston shop. Marine Detail Supply Charleston is at 7644 Southrail Rd., Unit #400C, North Charleston, SC 29420, serving Charleston, Mount Pleasant, Summerville, Daniel Island, Folly Beach, James Island, Isle of Palms, Kiawah and the Lowcountry marinas. Call (843) 256-3383 or email noah@marinedetailsupply.com to check stock, arrange local pickup at the shop, or place yard and fleet orders.
- We price match our competitors so you get the best pricing
- Same-day shipping from our North Charleston shop
- We ship domestically and internationally with great rates
- Questions? Call us at (843) 256-3383