BitPost - Brush On - Timber Stain & Preserver


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Product Overview


BitPost ™ is an alternative product for Creosote or Carbolineum. It is a New Zealand manufactured bituminous oil based emulsion / polymer product.

Because of its rot-resisting and disinfecting effect, BitPost ™ is ideally suited for the preservation and staining of wooden structures such as Post and Rail fences, Retaining walls and Construction timber framing etc. It is also suitable to preserve in-ground planted posts.

Timber requires one coat only and One (1) Litre will cover approximately 2 to 3 Square Meters. On Post and (3 rails) fence 1 Litre will cover approximately 2 to 3 linear meters, stained on both sides.

  • 4ltr will cover 8 to 12 Square Meters or 8 to 12 linear meters of Post & Rail Fence
  • 20ltr will cover 40 to 60 Square Meters or 40 to 60 linear meters of Post & Rail Fence
  • 200ltr will cover 400 to 600 Square Meters or 400 to 600 linear meters of Post & Rail Fence

BitPost ™ - Brush on is intended primarily for surface application by brushing, dipping or by airless spray equipment.
BitPost ™ - Brush on Gives an economical yet high quality finish which is ideal for larger projects.

A re-coat will be required after 3 to 5 years, where after it will last another 8 to 10 years before coating again.

The colour is black to very dark brown.

Please have a look at our BitPost ™ Fence Stain Application Pack for sale under the Consumables & Equipment category

BitPost ™ - Brush on is now also available at Cambridge, Thomsons Hamilton, Thomsons Whatawhata, Thomsons Papakura and Matamata Post & Rails ITM

Please note you can now select your prefered product packaging.



  • BitPost ™ is an alternative product for the use of Creosote or Carbolimium which has been limited and/or forbidden by some countries due to the introduction of stricter environmental regulations.
  • BitPost ™ will retard distortion, movement and splitting of timber, due to weather exposure
  • BitPost ™ is non-corrosive to metals
  • Can be used on other wood structures
  • Suitable on in-ground Posts
  • Will penetrate the timber rapidly
  • For best results apply to dry timber
  • BitPost ™ is idealy suited for:
  • Horse Fencing : Detere horses to nibble on coated fence
  • Chicken Coops : BitPost will reduce the risk of RED MITE infestation
  • Vegetable Gardens : BitPost can be used on boxes and stakes



For more detailed information please see our documents below.

Packaging: Available in 4, 20 and 200 Litre containers. Plastic jerry can, Metal flasks with bericap, Plastic open top paint bucket, Metal open top paint pail and Metal drum with bungs. 

BitPost ™ is an oily water emulsion, water-soluble, non-flammable, black to very brown mixture from bitumen, water and petroleum components, smelling of tar.
BitPost ™ is a New Zealand manufactured, creosote alternative, bituminous emulsion / polymer product which will penetrate the timber rapidly due to its viscosity.
BitPost ™ gives a high degree of water repellence and will retard distortion, movement and splitting of timber, due to weather exposure.
BitPost ™ preserver is non-flammable and the treated wood, after drying, presents no greater fire hazard than ordinary timber.
BitPost ™ is non-corrosive to metals and can have a protective action on iron and steel.
BitPost ™ is non toxic and is safe around your animals.



These documents contain important information about:

  • Material Safety Data
  • General Information
  • Application
  • Storage
  • Safe use
  • First Aid
  • Clean Up
  • Warranty
  • Available Packing Sizes
  • and more information

Note: To view the following PDF documents, you will require some type of PDF-reader plugin on your system.
If you need an up-to-date plugin you can install Adobe's free PDF reader from here.


BitPost Durability Test Report

Material Safety Data Sheet (MSDS)

Product Data Sheet (PDS)

General Information Summary

Information Brochure


(21 reviews) Write a Review

21 Reviews Hide Reviews Show Reviews

  • 5
    Bitpost brushon

    Posted by Russell Stevens on 2nd Apr 2024

    Very easy to apply

  • 5
    Bitpost Brush on Timber Stain & Perserver

    Posted by Karl on 3rd Feb 2024

    Top product! Agitated regularly to keep bitumen suspended and once dry water beads off timber. Shipping was a breeze excellent communication. The whole experience was very professional. Well done!

  • 5
    20l Bitpost brushon

    Posted by Russell Stevens on 1st Dec 2023

    Very easy to apply, looks great on retaining walls

  • 4
    BitPost brush on

    Posted by Andrew Holliday on 20th Jul 2023

    It's my first time using the product and it seems a good substitute now that Creasote is banned. It needs regular shaking to ensure the Bitumen stays in suspension. The colour is very good. So far I'm very happy with product.

  • 4
    Bit Post Brush on Stain

    Posted by Lorraine Vogt on 19th Dec 2022

    My project was to stain both sides of an old 55m fence and retaining wall. I chose this Bitpost stain for these reasons. Timber requires only one coat, its rot-resisting, disinfecting and has preservative qualities. My orders were shipped promptly and the only delay was with the Courier due to the time of the year. I was more than happy with the product and the only reason I didn't give it a 5 is that I will need to wait and see how well the product meets its description and only time will tell me that. Thank you Biosymph.

  • 5
    BitPost Brush On

    Posted by Tim on 24th Oct 2022

    Very happy with the product, goes on easily, and no problems with cleaning the brush afterwards.

  • 5
    Well worth the money

    Posted by Marius Koekemoer on 4th Jul 2022

    I have bought this product a few times and best value for you money

  • 5
    Bitpost is the shizzle!

    Posted by Lance on 29th Jun 2022

    I have used it to add additional protection to piles, bearers and joists on my new deck. The way the water just beads off shows how will it works. Highly recommended.

  • 5
    Bitpost 4L

    Posted by Lance Edmonds on 6th Jun 2022

    Paints on easily. I used this on H5 piles for my deck build. The next day it rained heavily and the water just beaded off! Excellent water repellent properties. I'm going to buy more and do the bearers and joists too.