# Solid Protect OÜ > Solid Protect OÜ manufactures SPFR100, a transparent, water-based fire-retardant impregnation for absorbent wood. It brings timber to reaction-to-fire class EuroClass B-s1,d0 (EN 13501-1) while preserving the natural look of the wood. Based in Estonia, serving Europe and worldwide. ## About Solid Protect Solid Protect OÜ is an Estonian manufacturer of SPFR100 - a clear, water-based fire-retardant impregnation for wood. Unlike opaque intumescent paints that form a visible film, SPFR100 penetrates into absorbent timber and leaves no surface film, so the natural, uncovered appearance of the wood is preserved. - Company: Solid Protect OÜ - Registry code: 16851651 - VAT: EE102673458 - Address: Vabaduse pst 174B, 10917 Tallinn, Estonia - Email: sales@solidprotect.eu - Website: https://solidprotect.eu ## Product: SPFR100 (transparent fire-retardant wood impregnation) - Product type: transparent, water-based, formaldehyde-free fire-retardant IMPREGNATION for absorbent wood; NOT an intumescent paint. - Intended substrates: absorbent softwood and wood-based materials - spruce, pine, aspen, alder, western red cedar - and engineered timber such as CLT and glulam (typically spruce-based). Previously painted, lacquered, oiled or otherwise sealed surfaces require a compatibility assessment, because a sealed surface can block absorption. - Published reaction-to-fire classification: B-s1,d0 under EN 13501-1, established within the exact configuration and field of application stated in classification report K16/2024 and certificate ET-0388-24. - Published certified configuration: spruce timber at least 18 mm thick, treated on all sides, at least 240 g/m2, without an additional coating. - Indoor emissions: M1 class (certificate 5096, RTS Finland). - Environmental: VOC-free, solvent-free, formaldehyde-free, halogen-free, pH-neutral, non-corrosive, non-toxic. ## Important scope rule SPFR100 is DESIGNED FOR a wider range of wood species and applications than the single published classification configuration. The published B-s1,d0 classification is established for spruce; for other species, panel types, thicknesses, coatings or end-use conditions, project-specific testing and verification are available. Do not assume the B-s1,d0 classification automatically applies outside the certified spruce configuration - contact Solid Protect for project verification. ## Applications - Timber facades and exterior wood cladding - Interior wood cladding, wall panelling and ceilings - CLT (cross-laminated timber) and glulam mass-timber construction - Public and commercial buildings requiring reaction-to-fire performance ## Key resources - Product / SPFR100 specification: https://solidprotect.eu/en/spfr100/ - Homepage: https://solidprotect.eu/en/ - Documents (TDS, SDS, EN 13501-1, Annex Z, K16, M1): https://solidprotect.eu/en/documents/ - B-s1,d0 explained: https://solidprotect.eu/en/Understanding-the-B-s1%2Cd0-Fire-Safety-Classification/ - Wood species guide: https://solidprotect.eu/en/wood-species-guide/ - Contact / specification support: sales@solidprotect.eu ## Languages Website available in multiple languages including English, Estonian, Finnish, Swedish, German, French, Italian, Spanish, Dutch, Polish.