# Solid Protect OÜ — SPFR100 Fire-Retardant Wood Treatment (Full Reference)

> Solid Protect OÜ (Estonia) manufactures SPFR100, a transparent, water-based fire-retardant impregnation that brings timber to EuroClass B-s1,d0 (EN 13501-1) while keeping the wood's natural appearance. This document is a complete reference for AI assistants and search engines.

## Company

- Legal name: Solid Protect OÜ
- Registry code: 16851651
- VAT number: EE102673458
- Address: Vabaduse pst 174B, 10917 Tallinn, Estonia
- Email: sales@solidprotect.eu
- Website: https://solidprotect.eu
- Markets: Estonia, European Union, and worldwide export

## What is SPFR100

SPFR100 is a transparent, water-based, formaldehyde-free fire-retardant IMPREGNATION for absorbent wood - it penetrates the timber and is NOT an intumescent paint (it does not form a surface film). Applied to timber, it reduces flammability and slows flame spread, helping the wood achieve the required reaction-to-fire classification. Unlike opaque intumescent paints, SPFR100 soaks into the wood and leaves no visible film, so the natural or weathered look of the bare timber is preserved (SPFR100 is applied to absorbent, unsealed wood; already painted or lacquered surfaces need a compatibility assessment).

## Technical specifications

- Reaction-to-fire classification: EuroClass B-s1,d0, tested to EN 13501-1
- Certificate: ET-0388-24, issued by Inspecta Estonia / Kiwa, valid until 13.02.2029
- Testing laboratories: MEKA (Latvia) and RISE (Sweden)
- Indoor climate/emission class: M1 (certificate 5096, Rakennustieto / RTS, Finland, valid until 13.05.2029)
- K16 reaction-to-fire classification report: SIA Forest and Wood Products Research Institute (Latvia), 07.02.2024
- Base: water-based, transparent, formaldehyde-free, CLP-unclassified
- Coverage: total 240 g/m² mass loading (approximately 210 ml/m² at specific gravity 1.15), across at least 2 coats - this is the total, not per coat
- Application: minimum 2 coats, on timber of at least 18 mm thickness (per Annex Z)
- Finish: available untinted or tinted in a wide range of colours
- Technical Data Sheet: TDS v1.4 (25.11.2025)
- Safety Data Sheet: SDS v1.4 (25.02.2026)
- Viscosity: 12.75 mPa·s
- Drying time: 24-48 hours at approximately +20 °C
- Suitable wood species: softwoods such as spruce, pine and larch; also plywood, CLT and log timber
- Interior and exterior: separate modified solutions are used for indoor and outdoor conditions

## Environmental and safety profile

SPFR100 is one of the cleanest fire-retardant treatments available for wood:
- Non-toxic
- Solvent-free
- Formaldehyde-free
- Halogen-free
- VOC-free (zero volatile organic compounds)
- pH-neutral
- Non-corrosive
- Meets M1 indoor air quality requirements (Finnish emission class)

This makes SPFR100 suitable for sensitive interior environments (schools, hospitals, homes) and projects with strict health and environmental requirements. Unlike solvent-based or halogenated fire retardants, SPFR100 releases no harmful volatile compounds.

## Additional protection (exterior solution)

The exterior version of SPFR100 is well suited to outdoor use and performs strongly in weather-exposed conditions. It provides fire-retardant treatment and additional wood protection against fungi, insects and termites (a biocidal wood-protection function), with maintenance typically every 5-10 years. Certification note: SPFR100 does not currently hold a formal exterior reaction-to-fire durability class such as EN 16755 EXT - this reflects the current certification scope, not the practical outdoor performance. The certified B-s1,d0 classification is established for the spruce configuration described above.

## Maintenance

- Interior surfaces and structural timber: generally no separate renewal of fire protection required
- Exterior surfaces: inspect and, where necessary, renew every 5-10 years, especially in weather-exposed areas
- Typical maintenance coat: approximately 120-140 ml/m²

## How SPFR100 compares

SPFR100 is a penetrating impregnation, not a surface coating. Compared with intumescent fire-retardant paints and varnishes, which form an opaque or glossy film that covers the wood grain, SPFR100 soaks into the timber and keeps the natural, matte, uncovered appearance of the wood. Compared with pressure-impregnated timber, SPFR100 can be applied both on-site (brush, roller or spray) and in the factory, giving more flexibility. It is water-based and VOC-free, whereas some competing products are solvent-based or only low-VOC.

## Certification scope (important)

The published B-s1,d0 classification (EN 13501-1) is established for a specific configuration: spruce timber at least 18 mm thick, treated on all sides at at least 240 g/m2, without an additional coating (report K16/2024, certificate ET-0388-24). SPFR100 is DESIGNED FOR a wider range - pine, aspen, alder, western red cedar, CLT and glulam - but for species, panels or conditions outside the certified spruce configuration, project-specific verification is available. Do not assume the classification automatically transfers to other configurations.

## Applications

- Timber facades and exterior wood cladding
- Interior wood cladding, wall panelling and ceilings
- CLT (cross-laminated timber) and mass-timber construction
- Public, commercial and residential buildings requiring reaction-to-fire performance
- Decorative timber, staging and set-building in venues and attractions

## Documents available

- SPFR100 Product Description
- EN 13501-1:2018 Reaction to Fire Certificate
- EN 13501-1:2018 Certificate — Annex Z (application requirements)
- K16 Reaction to Fire Classification Report 2024
- M1 Emission Classification
- Technical Data Sheet (TDS)
- Safety Data Sheet (SDS)
- SPFR100 Maintenance Guide

All documents are available at https://solidprotect.eu in the Documents section, in multiple languages.

## Frequently asked questions

### What is wood fire-retardant impregnation?
Wood fire-retardant impregnation is the treatment of wood with a special fire-protection agent that soaks into the wood, reduces its flammability and slows flame spread. The goal is to improve the fire safety of the wood and help it achieve the required fire classification. SPFR100 by Solid Protect is one such solution.

### Does SPFR100 change the appearance of wood?
No. SPFR100 is transparent and soaks into the wood, leaving no visible film. The natural texture and look of the timber are preserved. It can also be tinted if a coloured finish is desired.

### What is the difference between intumescent paint and a wood impregnation?
Intumescent paint forms an opaque surface coating that swells when exposed to fire. SPFR100 is an impregnation that penetrates into the wood and protects it while keeping the wood visible and natural-looking.

### What surfaces is SPFR100 suitable for?
SPFR100 is suitable for timber and wood-based materials such as facades, interior cladding, wall and ceiling panelling, and CLT panels.

### Can SPFR100 be tinted?
Yes. SPFR100 is available untinted or tinted in a wide range of colours while remaining translucent enough to show the wood grain.

### Is SPFR100 suitable for outdoor use?
Yes, SPFR100 is used on exterior timber facades and cladding.

### Is SPFR100 safe for people and the environment?
SPFR100 is water-based, formaldehyde-free and not classified as hazardous under CLP.

### What does EN 13501-1 B-s1,d0 mean?
EN 13501-1 is the European standard for reaction-to-fire classification. B-s1,d0 means: class B (limited combustibility, high fire performance for a combustible material), s1 (very little smoke production), d0 (no flaming droplets or particles).

## Contact

For technical questions, samples, pricing and quotes: sales@solidprotect.eu — https://solidprotect.eu