Watco Fine Crack Filler
- Lightwork of heavy-duty repairs
- Structural strength solutions
Watco Fine Crack Filler is a pourable epoxy resin for narrow cracks in concrete floors. It fills the line of the crack before coating, helping you prepare a more even surface for floor paint. The two-part, 100% solids formula cures without shrinking and can be painted once it has hardened.
Use it for fine cracks up to 3mm wide and small holes below 50mm in diameter and 25mm deep. The liquid can be drawn level with a scraper, making it practical for local repairs around a floor before repainting. It suits indoor and outdoor concrete, with a grey finish that can be left exposed or coated.
Surface Preparation
Rake loose material out of the crack and remove dust, grease and contamination. The crack must be clean and dry so the resin can bond to its sides. Chasing out the crack is not normally necessary. Check the width, depth and condition of the damage before opening the pack.
No primer is required. Check the floor temperature as well as the air temperature, especially in unheated buildings. For work below the original grade's 15°C minimum, see Fine Crack Filler Cold Cure.
Technical Data
- Pack size is 500ml, comprising resin and curing agent.
- Composition is a two-part, 100% solids epoxy resin.
- Designed for cracks up to 3mm wide.
- Approximate yield is 25 linear metres of a crack 2mm wide and 5mm deep per pack.
- Minimum application temperature is 15°C.
- Typical cure is 3–4 hours at 20°C. Allow 4 hours before coating at that temperature.
- Working life is up to 20 minutes. Shelf life is 12 months unopened.
Directions for Use
Add the curing agent to the resin and stir thoroughly with a flat mixing blade or suitable slow-speed paddle. Scrape the sides and base of the tin as you mix, bringing all the material together until it is uniform. Have the prepared crack and application tools ready before combining the components.
Pour carefully along the crack, then draw a straight edge or plastic or rubber scraper over the repair. Remove excess from the surrounding concrete while it is workable. Allow the resin to harden before applying the floor coating.
Limitations
This filler is intended for surface filling. Continuing structural movement can cause a crack to reappear. Where one side of a crack has subsided, filling alone will leave a difference in level. Assess that profile separately when planning the repair.
Store at 15–25°C for at least eight hours before use. Remove food products from the area during application and curing. Actual yield varies along a crack as its width and depth change.
Product FAQs
Does it need a primer?
No primer is required. Clean and dry the crack thoroughly before applying the mixed resin.
What crack width can I fill?
Use it for narrow concrete cracks up to 3mm wide. It also fills small holes below 50mm diameter and 25mm deep.
How much crack will one pack fill?
Approximately 25 linear metres at 2mm wide and 5mm deep. Varying dimensions along the crack affect the amount required.
When can I paint the repair?
Allow four hours at 20°C before coating. Cooler conditions extend curing, and the original grade has a minimum application temperature of 15°C.
Data Sheets
We aim to deliver your products as quickly, safely and efficiently as possible. Below you'll find a full overview of our delivery process, options, pricing and terms. If you have any questions or a time-sensitive order, our team is always happy to help — just give us a call on 01902 712286.
📦 Standard Delivery
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Free delivery on all orders over £100 + VAT within UK mainland.
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For orders under £100 + VAT, a standard shipping fee will apply at checkout.
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Orders are typically delivered within 2–5 working days after receipt of cleared payment.
We use Parcelforce and FedEx as our main carriers, though this may vary based on location or size of your order.
⚠️ Important Notes on Delivery
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Orders placed after 12 midday (Monday–Friday) are usually dispatched the next working day.
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If you require urgent dispatch or Saturday delivery, please call us before placing your order.
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Do not schedule contractors or start work until goods have arrived and been checked — we cannot be held responsible for project delays due to late or damaged deliveries.
🚚 Next Day & Timed Delivery Options
We offer express shipping for orders needing a quicker turnaround:
| Service | Typical Cost* (Ex. VAT) |
|---|---|
| Next Day Delivery | £10.50 |
| Next Day AM Delivery | £15.00 |
| Specialist Items | £22–£25+ |
*Pricing depends on order contents and size. For mixed/tinted paint or specialist coatings, next-day delivery may cost more due to courier restrictions.
Please contact us if your order is time-sensitive — we’ll confirm what options are available based on your products and location.
📍 Delivery Outside UK Mainland
International Delivery
We are pleased to offer worldwide delivery on both parcel and pallet orders.
Parcel Shipments
All international parcel deliveries are handled by FedEx International. Shipping times and costs vary depending on destination, parcel size, and service availability.
Pallet Shipments (Including Dangerous Goods)
For palletised orders — including those containing dangerous goods - we work with independent specialist freight companies experienced in compliant global hazardous materials transport.
Due to the nature of these shipments, pricing and transit times are provided on a case‑by‑case basis.
Requesting an International Delivery Quote
If you would like to place an international order, simply get in touch and we will prepare a personalised shipping quote. Please provide the following details:
- Your full name
- Delivery address (including country and any required customs information)
- Details of the items you would like to order
- Quantities for each item
Once we have this information, we’ll handle the rest - from calculating the most suitable shipping method to arranging safe and compliant delivery to your destination.
🛠️ Specialist Products & Pallet Deliveries
Some coatings are made to order, particularly from premium brands like Sigma/PPG. These orders:
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May have longer lead times
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May carry a £150 + VAT delivery charge
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Could require pallet delivery — a separate charge may apply
If your order requires palletisation, we’ll contact you after checkout to confirm delivery costs. You're also welcome to contact us first for a delivery quote before placing the order.
📦 Stock & Availability
We hold a large amount of stock ready for immediate dispatch, but:
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Some products may need to be ordered in from manufacturers
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Specialist items may be tinted or made to order, causing additional lead time
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We’ll always aim to part-deliver where possible to avoid unnecessary delays
If you’re on a strict deadline, please get in touch before ordering so we can advise on delivery timeframes.
🚫 Delivery Liability
While we work hard to ensure your order arrives safely and on time, we use third-party carriers and cannot be held liable for:
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Delays in transit
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Lost shipments
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Goods damaged in delivery
If your order is damaged or delayed, please let us know as soon as possible. We are not always informed automatically by the courier, so your input is essential.
We will work with you to resolve any issues — whether that means replacing items or chasing the carrier.
Note: Address changes after dispatch may incur additional charges, so please double-check your delivery details at checkout.
🧾 Payments & Order Processing
Orders are only processed once full cleared payment has been received.
You will receive email updates at each stage of the process:
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Pending – order received
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Processing – being picked, packed or manufactured
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Dispatched – on the way with the carrier
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Back order / Part dispatched – if stock is split or delayed
Need Help?
If you're unsure about shipping costs, timelines, or need your order by a specific date, we strongly recommend giving us a quick call before placing your order:
📞 01902 712286
📧 info@andrewscoatings.co.uk
We're here to help make sure you get the right product, in the right place, at the right time.
