B-s1,d0 CertifiedCE MarkedWater-based • Low VOC

Natural timber.
Engineered fire safety.

Q: What does B-s1,d0 mean?

Per EN 13501-1: very limited heat release (B), very low smoke (s1), no flaming droplets (d0). The most requested class for timber surfaces in public buildings.

Q: Can any topcoat go over Wood-C?

No. B-s1,d0 is only valid with certified Topcoat C (max 100 g/m²). Non-certified topcoats void the class.

Q: Are RAL / NCS colours possible?

Yes, both brands offer RAL/NCS tinting and custom tones. Some products cannot be tinted; confirmation before ordering is required.

Treet NORFLAM® (Finland) and Protega (Sweden) — clear and semi-translucent fire retardant systems for CLT, glulam, facades and interiors.

Find Solution Browse Products

17Stocked product systems

B-s1,d0Top timber class

95%+Non-fossil raw materials (NORFLAM)

1988Protega experience since

Featured systems

Two Scandinavian leaders, one Turkish gateway

Information-only site — no e-commerce. Choose the right system, download TDS/ETA, request samples and quotes.

Finland • Treet Solutions

NORFLAM® — Bio-based clear / semi-translucent protection

Timber texture stays visible: fully clear (colourless) or one of 32 semi-translucent Nordic Hues tones — or a custom tone. Fire protection and surface finish in one pot: no extra coats.

✓ W310 — B-s1,d0 (spruce, cedar, douglas; facade + interior CLT)
✓ W311 — C-s1,d0 (spruce, pine + thermally modified timber)
✓ W101 — B-s1,d0 (CLT / glulam / panels)
✓ pH-neutral, water-based, low VOC — certified for exterior + humid/dry interiors

Treet Products W310 Details

Sweden • Protega AB