Diamond Polishing & Lapping Compounds

Diamond polishing and lapping compounds use micron-graded synthetic diamond to cut and polish the hardest materials. They are used for lapping and ultra-fine polishing of hardened steel, carbide, ceramics and glass, including mould tools and precision components.

Choose Diamond Paste for controlled application with felts, bobs and laps, Diamond Suspension for even liquid application, and Lapping Fluid to lubricate both and help carry away polishing residue.

Diamond Paste is colour-coded by micron grade, so you can work through the sequence from coarse to fine and keep grades separate.

Need a carrier for diamond paste?

Mounted felt bobs and points carry diamond paste into detailed areas.
Browse Mounted Felt Bobs & Points

Showing all 3 results

Diamond Polishing Compound (Diamond Paste) - 5 / 10 / 20 grams
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 This product has multiple variants. The options may be chosen on the product page

Abrasives

Diamond Polishing Compound (Diamond Paste) – 5 / 10 / 20 grams

Price range: £11.57 through £76.40 incl VAT
Diamond Spray
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 This product has multiple variants. The options may be chosen on the product page

Diamond Polishing & Lapping

Diamond Suspension (Liquid Diamond Compound / Spray) – 100 grams

£14.60 incl VAT
Lapping Fluid - Suitable for use with Diamond products for polishing
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 This product has multiple variants. The options may be chosen on the product page

Diamond Polishing & Lapping

Lapping Fluid – Lubricant for Diamond Polishing Compounds

Price range: £6.26 through £37.21 incl VAT

Choosing a Diamond Compound

ProductChoose It WhenSupply
Diamond PasteApplying diamond with felts, bobs, wood or laps to hard materials and detailed areasColour-coded micron grades in 5g, 10g and 20g
Diamond SuspensionYou need even coverage across a lap or larger area with consistent abrasive performance100g, in micron grades from 1/10 micron upwards
Lapping FluidLubricating diamond paste or suspension to maintain cutting performance and a consistent finish250ml, 1 litre and 5 litre, plus a 5 litre water-soluble option

Working Through the Grades

Start at the grade that removes the existing marks, then step down through finer grades. Clean thoroughly between grades and keep a separate felt or tool for each one. Apply sparingly: excess paste adds residue rather than cutting speed.

Further reading: Expert Advice on Using Diamond Compound, Surface Preparation Before Diamond Polishing and Diamond Polishing on Hardened Tool Steel.

A Lower-Cost Option for Softer Metals

On aluminium and other softer metals, Algalox is an economical alternative to diamond, graded from 30 to 1 micron. See Polishing & Lapping Pastes for the full paste range.

Need Help Choosing a Diamond Compound?

If you are unsure which product is right for the job, contact Moleroda with details of the workpiece material, its current surface condition, the machine or tool you are using and the finish you need.

Frequently Asked Questions (FAQs)

Paste stays where it is applied, which suits felts, bobs and detailed areas. Suspension spreads evenly across a lap or larger surface.

Lapping fluid is recommended with diamond paste and suspension. It reduces friction, maintains cutting performance and helps carry away polishing residue.

Each colour identifies a micron grade, making it easy to keep grades separate and work through them in order. The grade chart is on the product page.

It can, but Algalox is usually the more economical choice for aluminium and other softer metals.