AITHON PV 33 at ambient temperature is a perfectly transparent varnish, with a warm looking wax finish to exploit the timber natural beauty.

Aithon PV33 (Timber Fire Protection)

AITHON PV 33 at ambient temperature is a perfectly transparent varnish, with a warm looking wax finish to exploit the timber natural beauty.

Aithon PV33 (Timber Fire Protection)

PV33 (Timber Fire Protection) Aithon PV33 is the only varnish which grants:

AITHON PV 33 at ambient temperature is a perfectly transparent varnish, with a warm looking wax finish to exploit the timber natural beauty.


In a fire it reacts generating a thick layer of carbon char able to withstand heat above 1000°C, and protect timber structures up to 60 minutes.


FROM A THIN, PERFECTLY CLEAR FILM A RIGID CARBON CHAR IS CREATED, MORE THAN 3CM (1 3/16″) THICK, WITH HIGHLY EFFECTIVE THERMAL INSULATION.


R30, R60 Fire resistance (EN 13381-7 Standard)

Class B-s1-d0 (EN 13501-1)

ETA 15/0424

Class A (ASTM E84)


PV33 (Timber Fire Protection) Aithon PV33

  • R15, R30, R45 and R60 Fire resistance (EN 13381-7 and EN 13501-2)
  • Reduces the speed of carbonization up to 0,33 mm/min (unprotected timber: 0,8 mm/min according to: Eurocode 5 – Timber Structures)
  • Class B-s1-d0 (EN 13501-1 and EN 13501-2)
  • ETA 15/0424
  • Class A (ASTM E84)

  • Easy application by brush, roller or spray
  • High transparency, with matt wax finish coat
  • Fire protection and decoration in one product
  • Pigmented Finish Coat available on request (full color range)

Why Work With ATOL?

You have the assurance, with ATOL Fire all work will be carried out to the appropriate methods and standards. We will ensure that the building has the adequate compartmentation system, by completing a survey prior to performing any type of work fire protection. 

We will then perform any required additional works such as cavity barriers fitting, repair or supply and installation of fire rated door sets, as well as fire rated ceilings and walls so that the compartmentation system meets the legislative standards.

Our unrivalled knowledge means that we have the privilege of working with local and national organisations across the UK as we take a collaborative approach in everything we do to provide fully 3rd party accredited passive fire protection solutions on price and on time.

Aithon PV33 (Timber Fire Protection) Case Studies

ATOL relish the opportunity of protecting the tree house helping turn peoples dreams into a reality.
Fairytale Castle Tree House