Rust-Oleum Waterproof Kit
  • Rust-Oleum Waterproof Kit

Rust-Oleum Fillcoat Fibres Repair Kit


Rust-Oleum Fillcoat Fibres Repair Kit is a complete kit that seals leaks quickly and simply, even in bad weather! 

  • Thick waterproofing roof repair paint
  • For use in any weather (even in the wet)
  • Adheres to wet surfaces
  • Fibres reinforced
  • Crack bridging (2mm) - 1300% elastic
  • Recommended for use on leaking flat or pitched roofs, guttering, ridge pieces, chimney stacks, roof tiles, glass, and more (see the product datasheet)
  • Emergency Leaking Roof Repair Kit includes 1 litre of Dark Grey Rust-Oleum Mathys Fillcoat Fibres, instruction sheet, brush, gloves, stirring stick, sanding pad, crack bridging fleece
VAT excluded

£25.14 Tax incl.


Rust-Oleum Fillcoat Fibres Repair Kit is a repair compound for flat and pitched roofs. It is instantly waterproofing and remains up to 1300% elastic, providing good resistance against weather influences, mineral acids (max. 10% in water) and does not contain bituminous products.

Recommended Uses

  • Leaking roofs
  • Gutters
  • Ridge pieces
  • Chimney stacks
  • Pipes
  • Non-walkable terraces
  • Hard PVC
  • Polyester
  • Zinc
  • Aluminium
  • Glass
  • Tiles

Rust-Oleum Fillcoat Fibres Repair Kit has excellent adhesion on different substrates and after cleaning, can be applied directly on bituminous substrates.

Porous materials (concrete, stone, wood) must first be dried and pre-treated with a coat of Rust-Oleum Mathys Primer 44 HS.

Easy to use emergency kit includes:

1 litre of Dark Grey Rust-Oleum Mathys Fillcoat Fibres, instruction sheet, brush, gloves, stirring stick, sanding pad, crack bridging fleece.

Surface Preparation

Remove dust, mud, grease, moss and withered leaves carefully. The spots to be repaired are cleaned with a hard broom and sponged. After cleaning, Rust-Oleum Fillcoat Fibres Repair Kit can be applied directly on bituminous substrates, hard PVC, polyester, zinc, aluminium, glass, tiles, etc. Porous materials (concrete, stone, wood) must first be dried and pre-treated with a coat of Rust-Oleum Mathys Primer 44 HS. In case of repeatedly repaired spots, important or active cracks, apply Rust-Oleum Fillcoat Fibres Repair Kit crosswise over the cracks or fissures. Consumption: 1,5 kg/m² with a hawk or a block brush.

Directions for Use

To ensure homogeneity, coating materials should be thoroughly stirred prior to use.

Application & Thinning

  • Brush: Do not dilute.
  • Roller: Not recommended.
  • Air-atomised spray: Not recommended.
  • Airless spray: Not recommended.
  • Cleanup: Rust-Oleum Thinner 22 or White Spirit.

Application Conditions

Can be applied during all weather conditions, except for snow.


  • Use an adhesion primer on Rust-Oleum Mathys Dac Hydro Alu.
  • Product is recoatable with Rust-Oleum Mathys Dacfill Waterproofing, Rust-Oleum Mathys Coating PRT or Rust-Oleum Mathys Dac Hydro Alu.
  • Never apply Rust-Oleum Fillcoat Fibres Repair Kit to polystyrene insulation or onto new concrete (concrete should be at least 2 years old).
  • Do not apply Rust-Oleum Fillcoat Fibres Repair Kit as priming coat under Rust-Oleum Mathys Dac Hydro Alu.
  • When using Rust-Oleum Fillcoat Fibres Repair Kit, smooth out the product in one direction, preferably perpendicularly to the cracks.

Please contact Rawlins Paints' Technical Support Team on 0113 2455450 for more information.

It is your responsibility to read the Product Data Sheets (available below) before you place an order and prior to application of the product. The content of this website is our best recommendation and is not advice. Coverage rates quoted are approximate, you agree that coverage depends on the condition of the substrate, surface absorption, texture and application method. We ALWAYS recommend a trial area is coated to ensure the product meets your requirements before use.

Product Details

Data sheet

Dry to Recoat (at 20°C)
3 - 14 days with the same product. 6 weeks with a paint
1m² per kit
Solids by Volume
43 %
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
2 hours (waterproof instantly)
UN Number
Not regulated
1 coat of 1,5 l/m²

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 Jes on 2019-12-19 15:20:56

Can this product be used to seal small holes (nail pop up) on a felt roof (garden shed). Thanks


Yes this would be fine.

questions Kevin Stockford on 2019-10-26 11:24:52

Can I use this product to seal a water leak on a join across the top of a caravan and does it dry white


Yes the product could be used for the application you have described but Rust-Oleum Fillcoat Fibres Repair Kit is Dark Grey in colour. If you require a product white in colour we would instead suggest Britannia Aquashield High Build which can be used in conjunction with Britannia Reinforcing Scrim if required.

questions Roland on 2019-07-11 13:57:59

Can this product be used on flat roof covered with rubber lining materials


No, we would instead recommend Gaco Liquid Roof Tape.

questions Sam Dorrian on 2019-06-04 09:44:50

Can this product be used to seal a failed lead box gutter? The product specification references zinc but not lead. Thanks


Yes, this product after cleaning and preparation can be applied to lead and is ideal in gutters.

questions colin stewart on 2019-05-06 12:26:24

Can this product be used to seal cracks in corrugated Asbestos roofing AND from the INSIDE ??


This product would be for use on the exterior (top side) of the roof only and the surface (after cleaning in accorandce with local regulations) would first need to be primed with Rust-Oleum Mathys Primer 44 HS. If you the wished to encapsulate the interior, underside of the roof to seal isolated asbestos fibres and prevent release you could use Thermoguard Asbestos Encapsulating Coating.

questions Debra on 2018-07-10 14:19:10

Can I use this product on concrete gutters to seal them


Yes, however porous materials (concrete, stone, wood) must first be dried and pre-treated with a coat of Rust-Oleum Mathys Primer 44 HS.

questions trevor on 2018-06-25 11:08:57

can i use rust-oleum fibre kit on my corrugated steel roof to repair a leak and how long would it likely last


Yes, Rust-Oleum Fillcoat Fibres Repair Kit may be used for this purpose, obviously depending on the actual source of the leak, and how large the “damaged” area is will determine the effectiveness of this. In terms of longevity we would estimate approximately five years, but this would require the steel to be thoroughly de-rusted first of all.

questions m jones on 2018-06-12 09:39:36

Good Morning .... I have a slate water feature in my garden and the water compartment has sprung a leak .... would Rust-Oleum Fillcoat Fibre Repair kit solve the problem and if so can I paint it onto the inside of the tank? Thank you.


We would suggest that the Fillcoat Fibres could offer a short term solution for this issue. However, we are presuming there has been some kind of structural failure (hence “springing a leak”) and without knowing more about that, we cannot advise how effective the Fillcoat Fibres will be, or for how long.

questions Craig Bell on 2018-02-03 20:15:41

Rust-Oleum Fillcoat Fibres Repair Kit. Can this be used to repair flat fibreglass roof? Thanks




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