Unfortunately no this is not suitable for application to plywood.

Please complete the timber form on the link below so we can assist with a specification.

Thermoguard Fire Application Forms

Unfortunately the product cannot acheive 60mins and it is not suitable for application to plywood or a veneer.

Please complete and return the timber form on the link below so we can assist with a specification.

Thermoguard Fire Application Forms

No, this product is recommended for application to bare, solid wood, with a minimum thickness of 12mm>.

Please e-mail [email protected] for further details of your requirements.

Assuming the treatment is applied in the correct humidity and allowed to dry fully before any other product is used nearby, this should be fine assuming application is to bare, solid wood with a minimum thickness> 12mm to achieve a Fire Rating of B s2 d0 to the timber it is protecting.

The chemicals should not affect this product once it is cured sufficiently.

Please e-mail your intended requirements to [email protected] and we can look to assist further.

Unfortunately no.

This product is designed for use on bare, solid wood with a minimum thickness >12mm.

We have contacted you directly to request more information.

Assuming the cladding is bare, clean, solid wood with a minimum thickness of 12mm, all areas to be treated should be coated by using immersion, spray, brush or roller and allowed to soak into the woods surface allowing all of the timber to treated.

This product is normally applied to the outside face of the timber, but we would recommend to consult building control for their requirements and approval to use this product.

Assuming the thickness of the timber is greater than 12mm, this product will be suitable for this application type as it will achieve the rating you require, providing protection for the lifetime of the substrate.

This product can be overpainted with a water based and non flammable paint, varnish or stain.

This product can be applied by brush, roller or spray application.

This product is described as virtually odour free and non-hazardous. 

Further information on the VOC's and ingredients within the product can be found in the Safety Data Sheet. 

This can be found in the data sheets tab on the product page. 

Unfortunately no, this product cannot be applied to a previously painted or varnished timber. 

Assuming the cedar timber is bare, over 12mm thick, this product will exceed the requirement of C-S3, d2 and achieve Euroclass B s2 d0.

This product does not achieve 30 or 60mins, only class 0.

Please send the information below to [email protected] and we can assist with a specification.

GENERAL TIMBER SURFACES
- Size of surface area to paint
- Timber thickness
- Level of Fire Protection required (Class 1, Class 0, 30min, 60min, etc.)
- Type of timber (i.e. pine, mdf, plywood, etc.)
- Type of Timber surface (i.e. T&G, feather edge / shiplap cladding, solid panels / sheets, etc.)
- Internal or external
- Use (i.e. floor, wall cladding, ceiling, etc.)
- Clear or coloured coating required?
- Bare or previously coated?

This is a penetrative treatment that is absorbed into the timber.

We would recommend seeking approval from building control for the application of any fire protection product.

Zeroflame Fire Retardant Treatment acheives Euroclass B-s2-d0 (s2: Smoke Production, d0: Flaming Droplets) (Equivalent to UK "Class 0" BS 476 Part 6/7) not the B-s1-d0 you have previously mentioned.

S2 is the smoke intensity level, S2 is emmisions with average volume intensity.

S1 is emmisions absent or very little.

The product does not meet S1.

Providing the timber doesn’t have any coating or treatment to hinder the impregnation of the Zeroflame Fire Retadant Treatment and the timber has a mass greater than 400kg/m3 and a minimum board thickness of 12mm it will achieve BS EN 13501-1:2007+A1:2009 B,s2, d0.

It is recommend to do the simple water test first where a small amount of water is put on the surface and if it soaks in then the treatment will do the same and likewise if it beads of the surface then it likely not to penetrate.

The criteria for the Zeroflame Fire Retardant Treatment is that if the timber has a mass greater than 400kg/m3 and a minimum board thickness of 12mm it will achieve BS EN 13501-1:2007+A1:2009 B,s2, d0.

This product can be applied by brush roller or spray application with equipment such as the 20 Litre Backpack Knapsack Pressure Sprayer.

The timber must be 12mm thick or greater to achieve Euroclass B (BS Class 0).

Yes this can be applied with a hand pumped pressure sprayer such as 20 Litre Backpack Knapsack Pressure Sprayer.

The coverage ratio for Zeroflame Fire Retardant Treatment is 4m² per litre.

No, Zeroflame Fire Retardant Treatment should be applied first to a bare suitable substrate and given time to be absorbed.

Then assuming the lime wash treatment is water based and non flammable it can be applied.

Assuming the timber is bare and absorbent, yes this product would be suitable.

Assuming the shingles are bare, this product could achieve Class 1 level of fire protection on the shingles.

Unfortunately they are too thin to achieve a Class 0 level of fire protection.

Zeroflame Fire Retardant Treatment does not effect the natural silvering process on timber.

For application to cedar the coverage rate is reduced to 2.7m² per litre.

Zeroflame Fire Retardant Treatment must be applied to bare timber only - an alternative system that will achieve Class 1/0 and be applied over previously painted surfaces would be Thermoguard Safewood Anti-Viral Fire Protection System.

If you have used 5ltr over the 18.5m² and it has been applied evenly over the area yes.

No, unfortunately this product will only achieve Class 0 level of fire protection on suitable substrates.

We can ship to UK mainland addresses.

This protect can achieve Class 0 level of fire protection on bare solid timbers.

This can be overpainted for decorative purposes with water based paints.

Yes Zeroflame Fire Retardant Treatment is suitable for application to thermally modified timber.

Assuming these panels are for an internal application, a white finish is suitable, the panels are clean, dry, sound and prepared as detailed in the Technical Data Sheet we can recommend Zeroflame Fire Retardant Paint.

Yes, assuming the timber is bare, clean, dry, sound and prepared as detailed in the Technical Data Sheet this can be applied to Thermowood to achieve Class B.

No, Zeroflame Fire Retardant Treatment cannot be overcoated with Osmo oil, it can be overcoated for decorative purposes with products that would not effect it’s fire protection level.

Unfortunately we do not have a clear product to recommend to prevent the Cedar going grey.

No, Zeroflame Fire Retardant Treatment can achieve Class 0 Level of fire protection on a suitable, bare timber substrate, not 1 hour. 

We have contacted you directly for more information to assist you with the project.

Assuming you require a Class 0 level of fire protection, the timber is bare, clean, dry, sound and preapred as detailed in the Technical Data Sheet it could be used on a timber decking.

Assuming the Cedar is bare and the level of fire protection you require is Class 0 this could be used.

We would recommend to consult Building Control to ascertain what level of Fire Protection is required for this project.

Waterborne stains or varnishes can be used over Zeroflame Fire Retardant Treatment as long as they are compatible, non-flammable and will dry.

We always recommend to try a small sample area first to ensure the stain does not react with the Zeroflame Fire Retardant Treatment and will dry out.

Waterborne stains or varnishes can be used over Zeroflame Fire Retardant Treatment as long as they are compatible, non-flammable and will dry. We always recommend to try a small sample area first to ensure the stain does not react with the Zeroflame Fire Retardant Treatment and will dry out.

Each square metre of wood must receive a minimum of 270ml of Zeroflame Fire Retardant Treatment (360ml per square metre if applying to Cedar woods) - as long as this consumption is achieved it can be done in as many or as few coats as you wish. Depending on application method we would expect this to take 2 - 3 coats to acheive.

Zeroflame Fire Retardant Treatment is a one-off treatment that will last the lifetime of the timber. The treatment will not penetrate entirely through the cladding to treat the battens also, so the cladding may need removing if the battens need treating too.

Yes, also be aware of reduced coverage rate of the product on cedar woods which reduces to 13.5m² per 5L and 54m² per 20L.

A certificate is issued by the manufacturer for every succesful application of Zeroflame Fire Retardant Treatment (a certificate application form must be completed and submitted either online or by post after use). BBA certification is not held due to BBA being unable to carry out fire testing, instead for this BBA are reliant on fire test centres such as Exova, BRE etc.

We have forwarded a copy of the test data held for Zeroflame Fire Retardant Treatment to your email address for perusal.

Zeroflame Fire Retardant Treatment has a certificate application form on the reverse of the label for you to complete and send back to the manufacturer for your certificate.

This has been sent to your email address.

Without performing an indicative test on the thickness of timber you wish to use, it is impossible to know how thin the wood could be and still achieve class 1. 14mm is the requirement with this product for Class 0.

Yes, Zeroflame Fire Retardant Treatment does provide Euro Class B on charred timber.  As with any solid timber substrate, as long as it soaks in the Zeroflame Treatment it will provide the fire protection.

Zeroflame Fire Retardant Treatment protects timber aginst the spread of flames not against heat. The product doesn't provide insulation ie will not prevent the timber from heating up if it is too close to the heat source. Unless you use a heat resistant paint which wil not flake off if exposed to high temperatures then it will not resolve the problem I'm afraid.

Zeroflame Fire Retardant Treatment needs to be applied at a rate of 270ml per m² of bare timber (360ml per m² when applying to cedar), whether you achieve this application rate in 1 coat or more doesn't matter, as long as it is achieved. Applying by spray (i.e. knapsack sprayer, HVLP, etc.) usually allows applicators to achieve the required coverage rates in 1 coat, applying by brush/roller would usually take more, i.e. 2-3 coats.

These have been forwarded to your email address as requested.

Zeroflame Fire Retardant Treatment will achieve Euroclass B on cedar when applied at a rate of 360ml per square metre. It is fine to be used externally and will remain effective for the lifetime of the timber. With regards to whether application to the top surface only will be sufficient or not would be a matter for your authority to comment on.

Yes we have an indicative test carried out by a laboratory which a copy of the report has been forwarded to your email address.

We dispatch nationwide however we would require your full address in order to provide a quotation for carriage to your location. Please contact our sales team on 0113 2455450 (option 1) or [email protected] to provide your address details and receive an accurate price/lead time.

Assuming that 5mm is a typo (this is VERY thin for T&G) and that infact it is considerably thicker than this - 50mm for example, then as long as the timber is bare Zeroflame Fire Retardant Treatment would be ideally suited to this application.

Yes, a copy of the test certificate has been sent to your email address.

Zeroflame Fire Retardant Treatment makes very little change to the appearance and finish of the timber. We do recommend you try a small area first and allow it to dry to ascertain you are happy with the appearance and finish before coating the whole area.

You need to ascertain whether Zeroflame Fire Retardant Treatment meets the requirements of your building control officer for your particualr use. The product achieves BS EN 13823 & BS EN 11925-2 Single Burning Item Euroclass B-s1-d0 (equivalent to UK "Class 0" BS 476 Parts 6/7). A certificate is issued after use by completion of a simple form on the back of the label on the container. Zeroflame Fire Retardant Treatment does not require specialist application.

Zeroflame Fire Retardant Treatment is not suitable for use on OSB. If you require a clear coating and wish to acheive BS Class 1/0 and/or EN Class B then we would recommend Thermoguard Fire Varnish BS Class 1/0 & EN Class B System.

Assuming the areas in question to paint are solid, bare timber, waterborne stains or varnishes can be used over Zeroflame Fire Retardant Treatment as long as they are compatible, non-flammable and will dry. We always recommend to try a small sample area first to ensure the stain does not react with the Zeroflame Fire Retardant Treatment and will dry out.

If you are intending to paint a colour then we would instead recommend applying Zinsser B-I-N, followed by Zeroflame Fire Retardant Paint. This will ensure no bleeding through of knots, stains, tannins, etc. from the wood into the final colour coat. Zeroflame Fire Retardant Paint can be either left as a white finish or overcoated. When overcoating use only waterborne latex paints, applied at a total dry film thickness not exceeding 35 microns.

Zeroflame Fire Retardant Treatment would not be suitable but the manufacturers of Hydron Nu-Flame Clear Impregnation have advised they see no issue using the suggested products with theirs, subject to a successful trial as you have recommended.

Assuming the lintel is timber, solid and bare then yes Zeroflame Fire Retardant Treatment could be applied to it. However it is important to note that this will not 'insulate' the timber from heat, the lintel could still reach unsafe temperatures and the proximity of this to your fire should be checked by a professional on site who can confirm suitability.

Waterborne stains or varnishes can be used over Zeroflame Fire Retardant Treatment as long as they are compatible, non-flammable and will dry. We always recommend to try a small sample area first to ensure the stain does not react with the Zeroflame Fire Retardant Treatment and will dry out.

Zeroflame Fire Retardant Treatment has been tested on multiple timber species, the most popular being; Pine, Spruce, UK Larch, Siberian Larch, Western Red Cedar, Oak and Thermowood. All these woods when the treatment is applied to the bare timber at the specified spreading rate achieved Euroclass B-s1-d0.

Zeroflame Fire Retardant Treatment is suitable for use on bare pine and would achieve Euroclass B. The measurements given of your cabin total approximately 57m², but we would assume that you have some areas to deduct from this such as windows, doors, etc. Each 5L will treat 18.5m² and 20L 74m².

Zeroflame Fire Retardant Treatment needs to be applied at a rate of 270ml per m² of bare timber (360ml per m² when applying to cedar), whether you achieve this application rate in 1 coat or more doesn't matter, as long as it is achieved. Applying by spray (i.e. knapsack sprayer, HVLP, etc.) usually allows applicators to achieve the required coverage rates in 1 coat, applying by brush/roller would usually take more, i.e. 2-3 coats.

Based on 200m² you would require 55 litres (73 litres if cedar), what needs to be protected on your building can only be advised by your authority for the project, so you should refer to them for clarification as to whether both sides need to be treated for example.

The Zeroflame Fire Retardant Treatment will protect the beam from burning but not from charring and blackening.  

Most timber in this situation is tanalised to protect against rot. Tanalising does not generally seal the timber so the Zeroflame Treatment can still penetrate. It is always good practice to drop some water onto the substrate to test how absorbent it is. If water can soak into the timber the Zeroflame Treatment will also be able to penetrate.

No, on pine the face of the timber needs to be a minimum of 14mm and on spruce a minimum of 18mm to achieve Euroclass B (BS Class 0) Fire Propagation and Spread of Flame fire protection.

Assuming the timber in question is bare and natural (i.e. not man made MDF, plywood, OSB, etc.) then Zeroflame Fire Retardant Treatment could be applied to upgrade the surfaces to Euroclass B (BS Class 0) Fire Propagation and Spread of Flame fire protection. However, usually this sort of location would require 30 or 60min protection, if this is the case you would instead need to look at Thermoguard Timbercoat 30 & 60 Minute System.

Zeroflame Fire Retardant Treatment achieves Euroclass B (BS Class 0) Fire Propagation and Spread of Flame fire protection on bare, solid timbers. You must ensure this level of fire protection is acceptable to your authority for the requirements of your project before use. If this is not the correct level of protection required by your authority please contact our Technical Department who will be able to provide an alternative product/system for you.

The timber should have less than 20% moisture content. We would also recommend you do a drop test with water to see whether it can soak in. As always we would recommend you do a small test area before coating the full project to confirm suitability.

Yes, tanalising timber doesn't normally seal it so the Zeroflame Fire Retardant Treatment can still soak in. If in doubt, try a drop test with water.

We don't know of a problem with maple wood but as long as the maximum density is no more than 780 kg per m3 then it should be fine. A drop test with water will also show whether Zeroflame Treatment can soak in. We recommend you try a small area first to assess if there is any colour change.

Zeroflame Fire Retardant Treatment achieves Euroclass B Fire Propagation and Spread of Flame on solid timbers, not 30 minute protection. The products we do have to provide 30 minutes fire resistance to doors (Door Upgrade Kits) cannot be applied to hollow doors.

Dedicated topcoats for Zeroflame Fire Retardant Treatment are being looked at but at present the advice is any waterborne stain can be used over Zeroflame Fire Retardant Treatment as long as it is compatible, non-flammable and will dry. We always recommend to try a small sample area first to ensure the stain does not react with Zeroflame Fire Retardant Treatment and will dry out.

Zeroflame Fire Retardant Treatment can be used on internal or external bare wood. It is regularly used on cladding and achieves Euroclass B (BS Class 0) Fire Propagation and Spread of Flame fire protection on solid timbers.

Waterborne paints and varnishes are recommended for overcoating Zeroflame Fire Retardant Treatment.

Yes, a copy has been forwarded to your email address.

Zeroflame Fire Retardant Treatment achieves Euroclass B (BS Class 0) Fire Propagation and Spread of Flame fire protection on solid timber. You will need to refer to your authority to ensure this is the level of fire protection they are expecting you to achieve. Due to it being a Surface Spread of Flame rating usually only the sides exposed to fire would need to be treated. Finally, this product would NOT stop or affect the natural weathering process of the wood.

We have sent copies of the test data to your email address.

Zeroflame Fire Retardant Treatment would certainly increase fire resistance of the timber surrounding your fire but it can't be used as a substitute for the correct installation and required distances of your fireplace.

We have written an extensive article on Painting the Walls around a Fireplace or Multi Fuel Stove which can be found HERE.

No, Zeroflame Fire Retardant Treatment cannot be used on felt. Rust-Oleum Mathys Dacfill HZ has an external fire exposure roof test to BS 476: Part 3: 2004 and achieved EXT.F.AC

Zeroflame Fire Retardant Treatment is a penetrative fluid that must be applied to porous, bare timber in order for it to soak in to the wood to be effective. It is not suitable for application over any previous coatings, these must be removed by stripping or sanding prior to application. Once Zeroflame Fire Retardant Treatment has been applied and allowed to sufficiently dry (usually around 7 days), you may apply certain stains, varnishes and paints for decoration purposes (contact our Technical Department for details of coatings that are suitable).

It isn't, but we do have a clear varnish system that is. Please contact our Technical Department on 0113 2455450 for details.

No, the Zeroflame Fire Retardant Treatment would not be suitable but our 1012 Fire Retardant Solution would be.