Your browser version is not officially supported, and you may experience a degraded service. Please upgrade your browser.

Watco Asphalt Crack Filler

Repairs and fills cracks in old asphalt

  • Cures in 2 to 4 hours
  • Stops water ingress and erosion damage
  • Rubberised bitumen formula
  • Flexible and copes with movement

Frequently bought together


Unsightly cracks in asphalt can lead to water ingress, erosion and accelerated deterioration of the surface. This rubberised bitumen based product makes crack repairs easy. Simply decant the liquid into a watering can (or any spouted can) and pour into the crack. 


  • Flexible to allow for expansion and movement
  • Ideal for cracks up to 3mm wide
  • Cracks 3-25mm wide can be filled by mixing Watco Asphalt Crack Filler with sand
  • Long lasting protection against ingress of water
  • Can be overcoated with Watco Asphalt Paint or Watco Black Top if required
  • Suitable for inside and out
  • Excellent adhesion
Properties Flexible, long lasting, protects against ingress of water, can be overcoated, inside or out, excellent adhesion.
Suitable for Asphalt/tarmac
Surfaces Floors.
Interior or Exterior Exterior
Primer required No primer required.
Composition Single pack, rubberised bitumen emulsion
Coverage Approximately 100m x 5mm wide x 5mm deep crack per 5L
Drying time 2–4 hours up to 3mm wide or 6–10 hours up to 20mm.
Curing time 6 hours for 25mm deep cracks at 15°C
Minimum application temperature 5°C


Sweep or scrape out loose debris from the crack.


Mix well before use. Do not use in wet or cold (below 5°C) conditions. Damp or cold weather will delay the drying time. The crack should be reasonably dry, although a little dampness may be tolerated.

Cracks up to 3mm wide: Pour the Watco Asphalt Crack Filler into the cracks using a spouted jug. Alternatively a watering can may be used. Brush out to a thin film any surplus liquid which overflows the edges of the crack. Once the Watco Asphalt Crack Filler has dried, dust with very fine sand or cement to remove any residual tack.

Cracks 3mm - 25mm wide: Prime the sides of the crack with a brush coat of Watco Asphalt Crack Filler. Mix Watco Asphalt Crack Filler with damp sand to produce a slightly stiff mortar. Trowel into the crack and smooth off. Once the mortar is dry, dust with very fine sand or cement to remove any residual tack.

Drying times vary widely depending upon weather conditions and size of crack. Dry, warm conditions will accelerate drying. The product sets by evaporation of water. Damp, cold conditions will therefore delay drying. As a guide, approximately 2-4 hours should be allowed for cracks up to 3mm and 6-10 hours for cracks up to 25mm.

Data sheets

Safety data sheets

Safety Data Sheet

Technical data sheets

Technical Data Sheet
Ask a question

Be the first to ask a question...

Ask a question
0 questions / 0 answers

€47.40 (Ex VAT)

In stock

Tools and accessories

Trowels and Floats

Trowels and Floats

Ideal for mixing, applying and levelling repairs

From €3.90  (Ex VAT)

Watco Spouted Jug

Watco Spouted Jug

For easy application of joint repair products

€7.10  (Ex VAT)

Watco Sand Additive

Watco Sand Additive

Increases viscocity of products for thicker application

€13.50  (Ex VAT)

Wire Brush & Scraper

Wire Brush & Scraper

A useful tool for removing rust and old coatings

€3.00  (Ex VAT)

What our customers say