Fire Retardant Varnish Overcoat (Interior)

Thermoguard Fire Varnish Overcoat is a crucial component of a comprehensive varnish system designed to safeguard internal timber and timber derivative substrates against fire damage while providing a durable finish. This versatile product offers the choice of a clear, tinted, or stained finish, catering to different aesthetic preferences and allowing the natural beauty of the wood to shine through.

Key features and benefits of Thermoguard Fire Varnish Overcoat include:

Fire Protection: When exposed to fire, the varnish expands to form an insulating barrier, effectively shielding timber surfaces from flames, heat, and oxygen. Additionally, it helps to suppress the emission of deadly smoke and gases, contributing to improved safety in case of a fire incident.

Durability: The formula is engineered to provide a long-lasting finish, enhancing the longevity of internal wood surfaces. This durability ensures that the protective properties remain intact over time, offering sustained fire protection and aesthetic appeal.

Enhanced Appearance: Whether opting for a clear, tinted, or stained finish, Thermoguard Fire Varnish Overcoat enhances the natural beauty of the wood, adding visual appeal to interior spaces. The choice of finishes allows for customization to suit different design preferences and architectural styles.

UV and Wear Protection: In addition to fire protection, the varnish overcoat also offers defense against UV radiation and wear. This feature helps to prevent color fading and surface damage caused by exposure to sunlight and everyday use, maintaining the appearance and integrity of the treated surfaces.

Matte or Satin Finish: Thermoguard Fire Varnish Overcoat is available in both matte and satin finishes, providing flexibility in achieving desired aesthetic effects. Whether aiming for a subtle, understated look or a more lustrous sheen, users can select the appropriate finish to suit their specific requirements.

Overall, Thermoguard Fire Varnish Overcoat combines fire protection with durability, aesthetics, and practicality, making it an ideal choice for enhancing the safety and visual appeal of internal wood surfaces in various settings


Thermoguard Fire Varnish Overcoat is a part of a varnish system with the option of a clear, tinted or stained finish for Fire Protection of internal timber and timber derivative substrates.

Formula provides durable finish to internal wood.

Clear or stained finishes enhance the natural beauty of the wood while fire protecting new and previously varnished surfaces.

When exposed to fire, Thermoguard Fire Varnish expands to create an insulating barrier, protecting timber surfaces from flames, heat and oxygen and suppressing emission of deadly smoke & gasses. Fire Varnish Overcoat matt or satin provide protection against UV and wear.


  • Wood


  • 20m2


  • Matt

  • Satin

Fire Rating

  • EN Class B

  • Class 0

  • Class 1

  • 30 & 60 mins Resistance to Fire (Specification Only)


Technical Data Sheet

Varnish Overcoat TDS Nov 23

Health & Safety Data Sheet

ThermoCLP FVO G S M 040822