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 : Horses will not 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


(14 reviews) Write a Review

14 Reviews Hide Reviews Show Reviews

  • 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.

  • 5
    Bit Post Brush On timber stain

    Posted by Warwick David Lind on 11th Feb 2022

    Excellent communication, fast delivery and a great, easily applied product.

  • 5

    Posted by graham brimble on 30th Dec 2021

    Love it. Purchased a Number of times and about to get more. I use it as a Base to make my own timber satin /preserver and it is amazing and very well priced for sure. I have sent friends all of the info in the past

  • 5
    BitPost-Timber Stain & Preserver

    Posted by Jeff on 28th Dec 2021

    A very good product. I have used it on an outside wooden firewood box. Once the first coat soaked in l decided to give it a second coat for extra protection. It was easy to apply with a paint brush and clean up was easily done with turpentine.

  • 5
    Biosymph Bitpost

    Posted by Martin Dutton on 21st Dec 2021

    Biosymph Bitpost is wonderful. I used it on a 25m odd long retaining wall using an air spray to get into all the gaps. Bitpost goes on really well. The first coat soaked into the wood, and the second formed a waterproof layer over the top... You can literally see the water being repelled when it rains heavily.

  • 4
    Great Product

    Posted by Joshua Moke on 7th Dec 2021

    Can be difficult to figure out how to work with effectively, but when you do it is a great affordable product with an outstanding finish.

  • 5
    Good Value

    Posted by Sara on 10th Nov 2021

    Used this to stain a fence instead of painting it. Great value for money, good coverage. Ended up buying more.

  • 5

    Posted by Leslie Simons on 20th Sep 2021

    Just started using it goes on easy looks good on wood soaking in excellent product thumbs up