Bollom Intulac™ Ultra Top Coat is a clear, protective varnish designed to be applied over Intulac Ultra Intumescent Base Coat, completing a high-performance fire protection system for interior timber.

Forming part of a 3-coat system, this topcoat seals and protects the intumescent layer beneath while enhancing the natural look of the wood. Available in matt and satin finishes, it provides a clean, decorative appearance without compromising fire performance.

When used correctly, the system achieves a Class B-s1, d0 fire rating, significantly reducing flame spread and heat release - making it ideal for public buildings, commercial interiors and communal areas.

Designed for ease of application, this single-pack varnish can be applied by brush, roller or spray, making it suitable for both site work and controlled environments.

System Build-Up

To achieve Class B-s1, d0 fire rating:

2 coats Intulac Ultra Base Coat
1 coat Intulac Ultra Top Coat

This is a certified system - both products must be used together to achieve compliance

✔️ Achieves Class B-s1, d0 fire rating (system)
✔️ Clear varnish – enhances natural wood appearance
✔️ Available in matt and satin finishes
✔️ Easy to apply, single pack system
✔️ Suitable for most timber and wood derivatives
✔️ Ideal for commercial and public spaces

Limitations

• Internal use only
• Not suitable for floors, stairs or high wear areas
• Must not be applied directly to bare timber
• Must be used within system

Surface Preparation

• Must be applied only over Intulac Ultra Base Coat
• Ensure basecoat has dried for minimum 48 hours (max 4 days)
• Surface must be clean, dry and free from dust, grease and contaminants
• Do not apply to untreated or uncoated timber
• Not suitable for surfaces subject to heavy mechanical wear (floors, stairs, doors)

Technical Data

Directions for Use

1. Stir thoroughly before use.
2. Ensure the Intulac Ultra Base Coat has fully cured (minimum 48 hours).
3. Apply one full coat at the specified coverage rate.
4. Apply evenly using brush, roller or airless spray.
5. Lay off in the direction of the wood grain for best finish.
6. Do not dilute.
7. Allow to dry for approximately 6 hours at 20°C.

Data Sheets 

Bollom Intulac Ultra Top Coat - TDS

Bollom Intulac Ultra Top Coat - MSDS