The advice is to use Rustoleum Mathys Elastofill to bridge cracks wider than 2mm before using Rustoelum Mathys Fillcoat Fibres but the data sheet for the Elastofill states it is for inside use only and does not mention bitumen. Can you please clear this up. Can i use Elastofill outside to bridge cracks that are wider than 2mm on a bitumen roof? If not, could i use the Mathys repair kit?

Rust-Oleum Mathys Elastofill can only be applied to internal substrates, so wouldn't be suitable for this type of application to an external roof. However, if choosing to use Rust-Oleum Mathys Fillcoat Fibres, this can be applied to bituminous roofs that are clean, dry, sound and prepared as detailed in the technical datasheet. The caveat to this however is 2mm gaps seem quite wide and could indicate an aged roof that's not in good condition. Please e-mail technical@rawlinspaints.com with images of the current condition of the roof to allow us to look into your enquiry further.

Hi can this product be used on a shed roof which has been felted ?

Assuming the bare felt roof is clean, dry, sound and prepared as detailed in the technical datasheet, you could consider this product.

Is this product suitable to seal asbestos/cement guttering? The joints are leaking. Attempts have been made to seal the joints with bitumen previously. Does the bitumen need cleaning off first? 18m long x 300mm wide

Assuming the bitumen products are removed prior to application, the asbestos guttering is bare, clean, dry, sound and prepared as detailed in the technical data sheet you could consider Rust-Oleum Mathys Fillcoat . This product would allow for easier application for this type of requirement as opposed to the Rust-Oleum Mathys Fillcoat Fibres .

I see previous comment about a fish pond, but I have a PVC pond shell which I want to extend up a little and wanted to use this to bridge between the PVC shell and a coated aluminium trim set into a brickwork perimeter above. Would this be suitable or is there another product to recommend?

Unfortunately we do not have a product we can recommend for this application.

Can this be used on the bottom of a fiberglass sailing dinghy. Existing fiberglass has some crazing and hairline cracks appearing.

Unfortunately no, we do not have a product to recommend for repairing the fibreglass hull.

Can I use this for my fish pond. Thanks

No, this product is not suitable for application to a pond. Assuming the pond is concrete, clean, sound and prepared as detailed in the technical data sheet we can recommend Teamac Chlorvar Chlorinated Rubber . The pond should not be refilled until completely dry, approximately 14 days.

I have replaced my wooden gutters with similar size plastic gutters some years ago. The joints on these gutters have started to leak and try as I might I can’t seem to stop the leaks. Would this product be suitable to stop them leaking. Thank you.

Assuming the gutters are PVC, clean, dry, sound and no cracks are larger than 2mm we can recommend Rust-Oleum Mathys Fillcoat Fibres for this application.

How long does this product last once applied on a GRP flat roof?

We would suggest 5 to 10 years, but this is heavily dependant upon a high level of surface preparation and correct application as detailed in the Technical Data Sheet. This can be found in the attachment tab on the product page.

Would your product seal a crack in lead flashing.??

Providing the surface is clean, Rust-Oleum Mathys Fillcoat Fibres can bridge cracks up to 2mm wide and is suitable for lead.

Hi, could I use this to paint over and seal some small cracks in cement on the top of a chimney stack? thanks

Bare concrete/cement would need priming first with Rust-Oleum Mathys Primer 44 HS prior to application of Rust-Oleum Mathys Fillcoat Fibres. If you only have a few cracks to treat then Rust-Oleum Mathys Elastofill may be suitable instead.

Is Fillcoat Fibres waterproofer suitable for galvanised steel guttering

Yes – so long as the galvanised steel is in good condition structurally, has no rust, has been thoroughly degreased and will be dry and clean at point of paint application. We would also suggest using Rust-Oleum Mathys Fillcoat first as a kind of primer coat to aid adhesion.

For inside of iron gutter at what rate per m2 should it be applied 1L or 1.5L /m2? or other? PS referring to Rust-oleum mathys fillcoat.

For waterproofing a gutter we would recommend the application of Rust-Oleum Mathys Fillcoat Fibres over any joints and cracks before applying a coat of Rust-Oleum Mathys Fillcoat over the whole gutter area. To provide a more durable, long lasting finish we'd recommend Rust-Oleum Mathys Fillcoat be applied at 1m²/litre.

Dear Sir. can you confirm a product that can waterproof an asbestos garage roof and how is it applied .

Rust-Oleum Mathys Fillcoat and Rust-Oleum Mathys Fillcoat Fibres can be used on asbestos but must first be primed with Rust-Oleum Mathys Primer 44 HS . Surfaces should be cleaned and a fungicidal solution to treat and wash the roof with like Rust-Oleum Mathys AMW Fungicidal Wash is always good practice. Be sure to follow government and local authority guidelines - further information on this can be provided by our Technical Department upon request.

Rust-Oleum Mathys Fillcoat Fibres

Reference 26.LGR.5

Brand Mathys

Search ID RUS652

Available in dark or light grey.
Instantly stops leaks and repairs cracks in roofs, terraces, gutters, ridge-pieces, chimney stacks, and pipes.
For bituminous surfaces, hard PVC, polyester, zinc, aluminium, glass, and tiles.
Applicable in all weather.
UV resistant, hydrophobic.

Colour

Light Grey
Dark Grey

Size

£81.65(incl. VAT)

£68.04(ex. VAT)

Quantity

Please choose your colour

In Stock and Available for Delivery (See Delivery Options Below)

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During busy periods, this means that tinted colours could take longer, for example – a ready mixed colour ordered on a 3-5 day delivery might arrive within 3 days, however a tinted colour might take the full 5 days to arrive.

To find Ready Mixed colours, search "ready mixed" or select the Ready Mixed 'colour chart'. To see Tinted colours select a colour chart such as RAL, BS, NCS, etc. or search for a colour/hue to see available or related options.

To ensure fair pricing, we split colours into ‘Price Bands’ to group together similar priced colours. If you wish to search for the cheapest tinted colours, always select Price Band 1.

We make every effort to list all available colours, however we also offer a colour match service which can be accessed by contacting our Technical Team on 0113 245 5450 (option 2) or emailing [email protected]

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15 questions about the product

Description

Rust-Oleum Mathys Fillcoat Fibres - Instant Crack Repair and Waterproofing

Rust-Oleum Mathys Fillcoat Fibres is a top-tier solution designed to provide instant waterproofing with enhanced durability and flexibility. This single-component product is specially formulated to stop leaks and repair cracks up to 2mm, ensuring long-lasting protection against water damage. The inclusion of crack-bridging fibres enhances its performance, making it ideal for a variety of surfaces.

Applications

Perfect for use on roofs, non-walkable terraces, gutters, ridge-pieces, chimney stacks, and pipes, Mathys Fillcoat Fibres offers versatile and reliable protection. It adheres excellently to various substrates, including bituminous surfaces, hard PVC, polyester, zinc, aluminium, glass, and tiles. This makes it a go-to solution for both residential and commercial waterproofing needs.

Features and Benefits

Instant Waterproofing: Provides immediate protection against leaks, ensuring peace of mind in all weather conditions.
Crack-Bridging Fibres: Incorporates fibres that bridge cracks up to 2mm, enhancing the structural integrity of the repaired surface.
Bitumen-Free Formula: Offers a cleaner, more environmentally friendly solution compared to traditional bituminous products.
UV and Weather Resistant: Enhanced UV resistance and hydrophobic properties ensure long-lasting performance.
Excellent Adhesion: Bonds well with a wide range of materials, ensuring versatile application and durable repairs.
Easy Application: Can be applied in all weather conditions, making it a reliable choice for urgent repairs.

Usage Restrictions

Do not apply Fillcoat Fibres on polystyrene insulation or new concrete (concrete should be at least 2 years old). Avoid using as a priming coat under Dac Hydro Alu. Always ensure proper surface preparation and follow application guidelines for optimal results. For detailed information, always refer to the downloadable data sheet.

Recommended Companion Products

Dacfill: A perfect recoatable finish for enhanced durability and aesthetic appeal.
Dacfill HZ: High-performance coating for heavy-duty applications.

Health and Safety

UN Number: UN1263
Mathys Fillcoat Fibres contains hydrocarbons and is classified under Flam. Liq. 3 and Aquatic Chronic 3. Always use personal protective equipment when handling the product. Store in a well-ventilated place away from heat and ignition sources. For more detailed safety information, consult the Safety Data Sheet (SDS).

Product Details

Reference 652-947187

Data sheet

Manufacturer: Rust-Oleum
For Use By: Consumer Use
Interior / Exterior Use: Exterior Use
For Use On: Zinc
Aluminium
Polyester
PVC
Glass
Concrete
Stone
Wood
Application Method: Brush
Colour: Standard / Ready Mixed
Single, Two or Three Pack: Single
Pack Size: 1L
5L
20L
Dry to Recoat (at 20°C): 3 - 14 days with the same product. 6 weeks with a paint
Coverage: 1.5l/m²
Recommended Thinner/Cleaner: Thinner 22
Density: 1,03
Solids by Volume: 43 %
VOC: 485 g/l
Shelf Life (from date of manufacture): 5 years from date of production in unopened cans, if stored in dry, well ventilated areas, not in direct sunlight at temperatures between 5° and 35°C.
Touch Dry: 1 Hour 30 Mins
Recommended Dry Film Thickness: 430 µm
Recommended Wet Film Thickness: 1000 µm
Base Type: Solvent-Based
Suitable For Use On: Flat Roofs
Suitable For Use On: Pitched Roofs
Suitable For Use On: Pipes
Suitable For Use On: Guttering
Suitable For Use On: Chimney Stacks
Application Method: Brush
Usages: Waterproofing
Usages: Crack Bridging
Product Usage Type: Repair
Fastest Delivery: Next Working Day
Colour Family: Grey
Categorised As: Roof Paints > Low Temperature Emergency Waterproofing
Seasonal: Cold Weather

Attachments

Download

Product Data Sheet

Download

Safety Data Sheet

Download

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

Questions

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Maz on 2024-10-09 09:05:55	Question: The advice is to use Rustoleum Mathys Elastofill to bridge cracks wider than 2mm before using Rustoelum Mathys Fillcoat Fibres but the data sheet for the Elastofill states it is for inside use only and does not mention bitumen. Can you please clear this up. Can i use Elastofill outside to bridge cracks that are wider than 2mm on a bitumen roof? If not, could i use the Mathys repair kit?
	Answer from Rawlins’ Technical Team: Rust-Oleum Mathys Elastofill can only be applied to internal substrates, so wouldn't be suitable for this type of application to an external roof. However, if choosing to use Rust-Oleum Mathys Fillcoat Fibres, this can be applied to bituminous roofs that are clean, dry, sound and prepared as detailed in the technical datasheet. The caveat to this however is 2mm gaps seem quite wide and could indicate an aged roof that's not in good condition. Please e-mail [email protected] with images of the current condition of the roof to allow us to look into your enquiry further.

Matthew on 2024-10-03 17:04:04	Question: Hi can this product be used on a shed roof which has been felted ?
	Answer from Rawlins’ Technical Team: Assuming the bare felt roof is clean, dry, sound and prepared as detailed in the technical datasheet, you could consider this product.

Neil on 2024-02-08 08:56:13	Question: Is this product suitable to seal asbestos/cement guttering? The joints are leaking. Attempts have been made to seal the joints with bitumen previously. Does the bitumen need cleaning off first? 18m long x 300mm wide
	Answer from Rawlins’ Technical Team: Assuming the bitumen products are removed prior to application, the asbestos guttering is bare, clean, dry, sound and prepared as detailed in the technical data sheet you could consider Rust-Oleum Mathys Fillcoat. This product would allow for easier application for this type of requirement as opposed to the Rust-Oleum Mathys Fillcoat Fibres.

Ed on 2023-07-21 16:31:18	Question: I see previous comment about a fish pond, but I have a PVC pond shell which I want to extend up a little and wanted to use this to bridge between the PVC shell and a coated aluminium trim set into a brickwork perimeter above. Would this be suitable or is there another product to recommend?
	Answer from Rawlins’ Technical Team: Unfortunately we do not have a product we can recommend for this application.

Alf on 2022-03-24 18:38:42	Question: Can this be used on the bottom of a fiberglass sailing dinghy. Existing fiberglass has some crazing and hairline cracks appearing.
	Answer from Rawlins’ Technical Team: Unfortunately no, we do not have a product to recommend for repairing the fibreglass hull.

Ash on 2020-12-28 19:08:54	Question: Can I use this for my fish pond. Thanks
	Answer from Rawlins’ Technical Team: No, this product is not suitable for application to a pond. Assuming the pond is concrete, clean, sound and prepared as detailed in the technical data sheet we can recommend Teamac Chlorvar Chlorinated Rubber. The pond should not be refilled until completely dry, approximately 14 days.

Robert Taylor on 2020-11-06 11:43:00	Question: I have replaced my wooden gutters with similar size plastic gutters some years ago. The joints on these gutters have started to leak and try as I might I can’t seem to stop the leaks. Would this product be suitable to stop them leaking. Thank you.
	Answer from Rawlins’ Technical Team: Assuming the gutters are PVC, clean, dry, sound and no cracks are larger than 2mm we can recommend Rust-Oleum Mathys Fillcoat Fibres for this application.

John nicholson on 2020-05-24 09:07:40	Question: How long does this product last once applied on a GRP flat roof?
	Answer from Rawlins’ Technical Team: We would suggest 5 to 10 years, but this is heavily dependant upon a high level of surface preparation and correct application as detailed in the Technical Data Sheet. This can be found in the attachment tab on the product page.

Mrs. Talbot on 2020-01-26 15:09:35	Question: Would your product seal a crack in lead flashing.??
	Answer from Rawlins’ Technical Team: Providing the surface is clean, Rust-Oleum Mathys Fillcoat Fibres can bridge cracks up to 2mm wide and is suitable for lead.

Hari Ma on 2020-01-13 13:22:24	Question: Hi, could I use this to paint over and seal some small cracks in cement on the top of a chimney stack? thanks
	Answer from Rawlins’ Technical Team: Bare concrete/cement would need priming first with Rust-Oleum Mathys Primer 44 HS prior to application of Rust-Oleum Mathys Fillcoat Fibres. If you only have a few cracks to treat then Rust-Oleum Mathys Elastofill may be suitable instead.

Lester Cook on 2019-06-19 18:05:27	Question: Is Fillcoat Fibres waterproofer suitable for galvanised steel guttering
	Answer from Rawlins’ Technical Team: Yes – so long as the galvanised steel is in good condition structurally, has no rust, has been thoroughly degreased and will be dry and clean at point of paint application. We would also suggest using Rust-Oleum Mathys Fillcoat first as a kind of primer coat to aid adhesion.

Daniel on 2019-06-11 20:28:07	Question: Can you use this on cracks on a fibreglass roof?
	Answer from Rawlins’ Technical Team: Yes.

Ian Smith on 2019-04-09 20:28:44	Question: For inside of iron gutter at what rate per m2 should it be applied 1L or 1.5L /m2? or other? PS referring to Rust-oleum mathys fillcoat.
	Answer from Rawlins’ Technical Team: For waterproofing a gutter we would recommend the application of Rust-Oleum Mathys Fillcoat Fibres over any joints and cracks before applying a coat of Rust-Oleum Mathys Fillcoat over the whole gutter area. To provide a more durable, long lasting finish we'd recommend Rust-Oleum Mathys Fillcoat be applied at 1m²/litre.

R. Gale-Brown on 2019-03-18 07:55:11	Question: Could you please advise on the coverage of the rustoleum fillcoat fibres tin Thank you
	Answer from Rawlins’ Technical Team: 1.5 litre per m².

James Johnston on 2016-09-16 20:09:03	Question: Dear Sir. can you confirm a product that can waterproof an asbestos garage roof and how is it applied .
	Answer from Rawlins’ Technical Team: Rust-Oleum Mathys Fillcoat and Rust-Oleum Mathys Fillcoat Fibres can be used on asbestos but must first be primed with Rust-Oleum Mathys Primer 44 HS. Surfaces should be cleaned and a fungicidal solution to treat and wash the roof with like Rust-Oleum Mathys AMW Fungicidal Wash is always good practice. Be sure to follow government and local authority guidelines - further information on this can be provided by our Technical Department upon request.

IMPORTANT SHIPPING & DELIVERY INFORMATION

Rust-Oleum Mathys Fillcoat Fibres is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.

Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.

Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.

All delivery costs below are excluding VAT

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Rust-Oleum Mathys Fillcoat Fibres

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Rust-Oleum Mathys Fillcoat Fibres - Instant Crack Repair and Waterproofing

Applications

Features and Benefits

Usage Restrictions

Recommended Companion Products

Health and Safety

Data sheet

Questions

Question about the product

IMPORTANT SHIPPING & DELIVERY INFORMATION

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