Watco Floor Joint Sealant
- Lightwork of heavy-duty repairs
- Structural strength solutions
Watco Floor Joint Sealant is a pourable, two-part polyurea for sealing expansion joints, construction day joints and cracks in concrete floors. It provides a flexible joint with good compression and recovery, helping protect slab edges in regularly trafficked areas.
Use it for joints up to 25mm wide in factory and warehouse floors, garages, car parks and forecourts. The mid-grey sealant suits indoor and outdoor work. Its wear and chemical resistance make it suitable for working floors where a correctly formed joint needs to accommodate movement.
Surface Preparation
Remove loose material and contamination and leave the joint sides clean and dry. Repair spalled concrete edges first with a suitable Concrex repair mortar. Use back-up rod to reduce deeper joints to the required depth, and mask the adjoining floor if needed.
Joint proportions matter. For widths of 5–10mm, depth should equal width. For widths of 10–20mm, use a 10mm depth. Above 20mm wide, make the depth half the width, within the maximum 25mm joint width.
Technical Data
- Pack size is 2.5L. Colour is mid-grey.
- Composition is a two-part flexible polyurea sealant.
- No primer is required for the specified clean concrete application.
- Minimum application temperature is 10°C.
- Working life is approximately one hour at 20°C.
- Sealed joints can accept traffic after approximately 8–12 hours. Full cure takes seven days.
- Published guide coverage is approximately 12m at 15mm wide and 10mm deep.
- Movement accommodation is stated as +15% when sealed at the midpoint of joint movement.
Directions for Use
Add the smaller tin to the larger tin and mix thoroughly for approximately three minutes with a wide-bladed tool or suitable slow-speed paddle. Scrape the sides and bottom, then transfer the mix into a clean pouring container. Mix again for one minute to incorporate all the components.
Pour evenly into the prepared joint, keeping the surface just below the surrounding floor. If necessary, use a flat blade to release trapped air. Remove masking tape before the sealant sets, drawing it across the joint so surplus falls into the joint rather than onto the floor.
Limitations
Keep the pack at 15–25°C for at least eight hours before use and protect from freezing. Allow the stated cure period before opening the area to traffic and distinguish this from the seven-day full cure.
Watco advises checking compatibility before using on plastics or bituminous surfaces. Follow the technical sheet for the joint profile and application conditions, and remove food products from the area during application and cure.
Product FAQs
What joint widths can it seal?
Use it in concrete floor joints up to 25mm wide. Choose the depth according to the width guidance in the technical sheet.
Do I need a primer?
No primer is required on the specified clean, dry concrete substrate. Repair loose or spalled joint edges before sealing.
When can the floor return to use?
Sealed joints can accept traffic after approximately 8–12 hours. Full cure takes seven days. Follow the technical sheet for site conditions.
Can I pour straight from the mixing tin?
Watco recommends transferring the mixed components into a clean pouring container and mixing again for one minute before filling the joint.
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.
