Gh901. Gelcoat Ultra Heavy Cut 1L
GELCOAT HEAVY CUT COMPOUND

Gh901. Gelcoat Ultra Heavy Cut 1L

Koch-Chemie Gelcoat Ultra Heavy Cut GH901 is a professional heavy-cut polishing compound developed for gelcoat and fibreglass surfaces. It removes heavy oxidation, scratches, weathering and sanding marks while restoring gloss and preparing surfaces for final polishing. 1L.

$137.15
SKU: KOCH-511001
✓Heavy oxidation removal
✓Restores faded gelcoat
✓Removes deep scratches
✓Ideal for marine and fibreglass surfaces
Fast Shipping Secure Checkout Professional Grade
⚓

Gelcoat Restoration

Restores weathered and faded gelcoat surfaces

⚙️

Heavy Cut Performance

Removes deep scratches and sanding marks

☀️

Oxidation Removal

Eliminates severe oxidation and chalking

🛥️

Marine Professional

Designed for boats, yachts and fibreglass surfaces

How to Use
1

CLEAN

Wash and dry the gelcoat surface thoroughly

2

APPLY

Apply to a heavy-cut polishing pad

3

POLISH

Machine polish until oxidation and defects are removed

4

REFINE

Follow with a finishing polish for maximum gloss

i

Product Information

Very coarse polishing compound for gelcoats and boat paints

Highly abrasive machine polish for the preparation of heavily weathered gelcoats and boat paints. Also suitable for dark gelcoats and paint colors. Effectively removes graying, deep scratches and scuff marks from fenders, for example, and is ideal for preparing for the subsequent polishing process. Gelcoat Ultra Heavy Cut is free from silicone oils and has low dust and spray development.

Can be applied using both rotary and eccentric polishing machines. Apply 5 pea-sized drops to a suitable polishing pad (Heavy Cut Pad, Lambswool Pad short or Twisted Wool Pad) and work crosswise. Spread the product evenly over the surface at low speed. Then polish with a rotary machine at max. 1000 rpm (eccentric machine on the highest setting). Remove any remaining polish with a Polish & Sealing Towel. On dark surfaces, polishing marks can be removed with Gelcoat Micro Cut. We recommend sealing after polishing with Gelcoat Finish, Marine Protective Sealant or Ceramic Boat Hull to close the pores of the surface.

Shake before use. Check for material compatibility before use. Do not use on hot surfaces. Protect from frost and excessive heat.

PDF Download Product Information MSDS / Safety Data Sheet ↓
Perfect For
🛥️
Boats & Yachts Restores weathered gelcoat surfaces
🚐
Motorhomes Suitable for fibreglass body panels
☀️
Oxidised Gelcoat Removes heavy chalking and fading
🧰
Marine Detailing Professional restoration applications
Perfect With
✓ Koch-Chemie Heavy Cut Long Wool Pad Ø150 mm Koch-Chemie Heavy Cut Long Wool Pad Ø150 mm
$39.22
Add to Cart →
✓ Koch-Chemie Backing Plate with cellular rubber cushion 147mm Koch-Chemie Backing Plate with cellular rubber cushion 147mm
$85.55
Add to Cart →
✓ Koch-Chemie Polish & Sealing Towel Koch-Chemie Polish & Sealing Towel
$25.48
Add to Cart →
✓ Koch-Chemie Fine Fiber Towel 54 x 44 cm Koch-Chemie Fine Fiber Towel 54 x 44 cm
$36.79
Add to Cart →
🧪
Professional FormulaTrusted by marine detailers
🚚
Fast ShippingNZ wide delivery
🔒
Secure CheckoutSafe payment methods
⭐
Premium QualityKoch-Chemie Germany

FAQ

Can GH901 be used on automotive paint?

No. GH901 is specifically developed for gelcoat and fibreglass surfaces such as boats and motorhomes.

What defects can GH901 remove?

It removes heavy oxidation, scratches, weathering and sanding marks from gelcoat surfaces.

Should I follow with a finishing polish?

Yes. After heavy correction, a finishing polish is recommended to maximise gloss and clarity.

Built For Professionals. Perfect For Gelcoat Restoration.

Restore weathered gelcoat surfaces with Koch-Chemie Gelcoat Ultra Heavy Cut GH901, removing heavy oxidation, scratches and sanding marks while preparing boats and fibreglass surfaces for a high-gloss finish.