Why does natural stone sometimes stain at the edges?

Often due to unsuitable sealants/primers or residues in the edge zone. That’s why system selection and proper prep are key.

Which sealants are suitable?

Typically neutral-cure systems approved for natural stone. We select based on stone, substrate, movement and manufacturer specs.

Yes — especially for light stone or critical details we recommend mock-ups to approve appearance/adhesion.

How do I maintain natural stone joints?

Use mild cleaners, avoid harsh scrubbing. Good ventilation reduces mould. We provide care tips after completion.

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Natural stone waterproofing – Zug

Seal natural stone without edge staining — compatible materials and clean workmanship.

Eurofugen – Sealing natural stone in Aargau (marble, granite, quartz, engineered stone). With natural stone, material compatibility is crucial: wrong products can contaminate or stain edge zones.

We use compatible systems (typically neutral-cure sealants), crisp edges and correctly sized backer rod. Mock-ups (appearance/adhesion) available on request.

Scope of work

Remove old material and clean edge zones carefully
Bond areas dust-/grease-free, primer if needed
Backer rod (no three-sided adhesion)
Apply compatible sealant & tool cleanly
Final check + care tips (cleaning, mould prevention)

Material compatibility

Natural stone can react to plasticizers, oils and unsuitable curing systems. We check substrate, stone type and system approvals — and recommend a mock-up when in doubt.

Clean edges & finish

We mask edges, apply sealant in a controlled way and tool evenly. This keeps appearance and edge zones clean — especially on light stones.

FAQ (natural stone)

Why does natural stone sometimes stain at the edges?

Often due to unsuitable sealants/primers or residues in the edge zone. That’s why system selection and proper prep are key.
Which sealants are suitable?

Typically neutral-cure systems approved for natural stone. We select based on stone, substrate, movement and manufacturer specs.
Do you do mock-ups?

Yes — especially for light stone or critical details we recommend mock-ups to approve appearance/adhesion.
How do I maintain natural stone joints?

Use mild cleaners, avoid harsh scrubbing. Good ventilation reduces mould. We provide care tips after completion.