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(0116) 230 1955

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“Construction chemicals have provided us with excellent service and high quality products at a very competitive price over the years. We would highly recommend them.”

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Ecobor II Wood Preservative Gel

Ecobor II is a special boron-based and Benzalkonium chloride brushable and injectable gel. For use in high risk areas to treat against dry and wet rot as well as wood destroying insects.

Our price: 68.56
Excluding VAT
82.27 Inc. VAT


Delivery: FREE

Ecobor II Wood Preservative Gel

Ecobor II is a special boron-based and Benzalkonium chloride brushable and injectable gel. For use in high risk areas to treat against dry and wet rot as well as wood destroying insects.

Ecobor II has been designed for use on all timbers at high risk of damage or decay such as joist ends, purlins, wall plates, cut ends and rafter ends
Ecobor II leaves no surface residues after treatment, is non-staining and can be overpainted in time.


  • Brushable and injectable multi-use gel

  • Excellent highly penetrating preservative for the control of wood - rotting fungi and wood boring insects

  • Approved under COPR 1986 for use as a wood preservative 

  • 20% Disodium octaborate tetrahydrate as the active ingredient with Benzalkonium chloride

  • Clean, easy to handle and virtually non-drip

  • A clear and non-staining preservative gel

  • Odourless and non-flammable

  • Permanent protection because the active ingredient does not break down

  • Convenient pack sizes



Treatment of wood boring insects and fungal decay:


1. Clean all wooden surfaces using a brush or vacuum cleaner.

2. To aid brushing out on any timbers, which are very dry or remain dusty, apply a little water to the surface before the application of ACS Ecobor II.


3. Apply a generous brush coat of ACS Ecobor II, taking care to ensure that end grains, corners and joints are well treated. Brush apply to any surfaces exposed by cutting after initial treatment.


4. Brush the ACS Ecobor II well into the surface taking care not overload the brush with the product, particularly on overhead, horizontal faces.


5. ACS Ecobor II may be used in outdoor conditions provided that the timber treated is then protected from weathering by an appropriate coating or sealant.



6. As a surface application the gel will not penetrate through paint, varnishes or other coatings and these should be removed before treatment. ACS Ecobor II can be injected through predrilled holes in areas where paint and coatings cannot be removed.

7. Clean all tools, brushes and equipment with water.



By brush : 1 litre to 2 - 2.5 m2 of timber surface

Large dimensional timbers may need more than one coat or additional treatment with Boracol B40/1 Paste.

By injection : Apply as necessary or until refusal through predrilled holes.



Available in a 5 litre robust plastic container.


Shelf life & storage

  • Twelve months in unopened, sealed containers.
  • Store in original packaging, unopened or sealed in a dry, safe place.
  • Keep out of reach of children.
  • Keep away from food, drink and animal feedstuffs.
  • Viscosity may be reduced at elevated temperatures.


Health & Safety

ACS Ecobor II is approved under the HSE COPR 1986 for use as directed HSE No: 6838. Refer to Safety Data Sheet (SDS) for the product. Use only as a wood preservative. Keep away from children and always read the label.

Information given is in good faith based on experience and usage, however all recommendations are made without warranty or guarantee, since the conditions of use are beyond our control. All goods are sold in accordance with our Conditions of Sale, copies of which are available on request. Customers are advised that products, techniques and codes of practice are under constant review and changes occur without notice, please ensure you have the latest updated information.

Delivery Information

We offer free UK mainland delivery. If you are not on the mainland, please give us a call on (0116) 230 1955 and we can give you an accurate delivery price. We make deliveries to Europe and to the rest of the world.

Please call us on (0116) 230 1955 to discuss an accurate shipping price. In certain cases, deliveries to the Highlands of Scotland & Northern Ireland may incur extra shipping costs. If such a situation arises, we will call you as we process the order in order to discuss this.


Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.

If you have any questions please call our customer service team on 0116 230 1955 or email us at


How to Get Items Ready for Return

Under our 30 Day Returns policy you can return faulty or unwanted goods.

Items should be unused, in a saleable condition, in original packaging and with all component parts and any promotional items received. You should include your invoice.

Faulty Goods

In the unlikely event that goods are faulty then we will replace them free of charge.

Unwanted Goods

Unwanted goods can be returned at the cost of the purchaser & will incur a 20% restocking charge. 

Certain items are excluded from the guarantee. These include goods that are made to order,or mixed to your requirements. Other excluded items are macerators and water pumps as well as parts of larger kits.


How to Return an Item

There are four common ways to return an item:

  1. For items under 1m in length & 2kg in weight, send them back from your local post office 
  2. For larger items, call our customer service team on 0116 2301955 for further advice
  3. We also offer a carrier pick up service, however, depending on the circumstances, this may incur a charge. For more information call our customer service team on 0116 230 1955
  4. For products delivered directly from our suppliers, please call our customer service team on 0116 2301955


Time After Purchase

If you purchased the item less than 30 days ago you can return it under our 30 Day Returns policy

If you purchased the item more than 30 days ago our aim is to get the problem put right as quickly as possible. In most instances we will either offer a replacement item with the same or an equivalent product.


If the item has already been installed, call us on 0116 230 1955 for further advice.

Expert Support

It can be difficult getting it right for your project & so we'd like to offer two ways of helping. The first is telephone support, the second is project specification for contractors.

Telephone Support

We aim to win with customer support. We have experts you can ask & we want your custom. Please call us on:

0116 230 1955

Monday to Friday 9am - 5pm

Free Product Specification Service for Contractors

In order to assist our customers with their projects, we are happy to offer a free Project Specification Service to ensure that contracts and work are specified correctly  and the list of materials required is as accurate as possible. Our Technical Team has many years experience in Dampproofing, Tanking and Waterproofing situations both here and abroad.

We recognize that our customers are involved in large & complicated projects, our aim to offer a service to help them get it right.

The benefits of the project specification service are:

  • Appraisal of the requirements of your project from an expert
  • One to one Conversation with the Technical Team, if required
  • A free specification for project planning purposes
  • A site visit if required
  • A Professional Indemnity Insurance-backed specification for peace of mind

Please call us on:

0116 230 1955

or email us at

no1 We Have Our Own In-house Chemist

This gives our customers access to first-class technical advice just by picking up the 'phone or emailing. We offer an unrivalled technical service that aims to give our customers the information they need to carry out their work with the right materials. This gives them and their customers confidence.

no2 We Have Local, UK-wide Coverage

We have 3 depots covering the whole of the UK. This benefits our customers because they can arrange for local pick-ups, they get faster, more flexible deliveries, & we have large stocks readily available.

no3 We Have Our Own Transport Network

For a great many of our products, we offer a personal delivery service, giving faster delivery, more security & less frustration.

no4 We Manufacture Our Own Products

We have control over our products and manufacture to a consistent specification. This means that our customers can expect the same high-quality materials, time and again.

no5 Our Directors Have Over 100 Years of Experience in the Industry

This provides our customers with first-class technical advice & a first-rate service & a team that understands your needs & your working environment.

no6 We Have an Experienced Team of Office Staff

All of our staff have worked for us for many years & know their products & have technical expertise. The quality of support is far superior to DIY chains and to our online competitors.

no7 All Non-Construction Chemicals Products are Sourced from ISO 9000 Companies

This means that all goods for sale from Construction Chemicals are of the highest quality. We only work with companies that have a proven track record.

no8 We Have a Large, Experienced Sales & Technical Support Team

Our sales & technical support staff cover the whole of the UK enabling you to get the materials you want for the job you need to complete, when you want to.

no9 We Offer Multiple Credit Options

We offer full credit, credit card & PayPal facilities making it easier for customers to buy and for trade customers to keep an account.

no10 We Stand by the Quality of Our Products & Our Relationship With Our Customers.

If a customer is not happy with their products, we will replace them without question.

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Need Technical Support? Ask Jim

Jim has decades of experience with all our adhesives, tanking products, dampproofing, timber treatment & general building chemicals. If you have a problem with application, specification or getting the right product for joinery, shopfitting or construction please call Jim on 0116 230 1955 or mobile 07768 365255

ask now