Watco Liquid Roof Membrane
Litres required: 0.00L
Based on 0.93 m² per litre- Lightwork of heavy-duty repairs
- Structural strength solutions
Watco Liquid Roof Membrane is a water based acrylic coating system for waterproofing suitable flat and pitched roofs. Applied cold with a roller, it forms a flexible, seamless membrane around the roof surface, pipework and other details where water ingress can occur.
The fibre-loaded formulation moves with the roof rather than forming a rigid film. It is designed for compatible concrete, asphalt and similar roofing membranes, with excellent resistance to UV and weathering. Two correctly applied coats, with reinforcement in the first, create the specified protective system. The Mid Grey semi-gloss finish suits roof refurbishment where a continuous coating is needed without heat application equipment.
- Single pack, cold-applied acrylic roof membrane.
- Flexible and breathable, with UV resistance.
- Reinforcement and two coats form the specified system.
Surface Preparation
Check the whole roof for weak, loose, flaking or defective areas. Repair cracks, holes and blisters before coating. Remove debris and contamination; treat moss and fungal growth with a suitable cleaner. The roof should be clean and dry, with only slight residual damp acceptable. Do not coat wet or icy surfaces. Confirm compatibility with the existing roofing material.
Technical Data
| Pack sizes / colour | 5L and 15L / Mid Grey |
|---|---|
| Composition | Single pack, water based, fibre-loaded acrylic |
| Finish | Smooth, semi-gloss |
| Coats | At least 2 at the specified rate |
| Minimum conditions | Air 15°C; surface 10°C |
| Shelf life | 12 months unopened |
Coverage
Approximately 5–7m² per 5L or 14–21m² per 15L per coat, depending on the roof. Allow material for both coats and all reinforcement details. A conservative planning rate of 0.93m²/L per coat accommodates the lower stated coverage of the larger pack. Do not spread more thinly to extend the area.
Directions for Use
- Stir thoroughly and do not thin. Brush generous material around joints and penetrations before the main coating.
- Apply with a suitable pile roller and brush at edges. Fully reinforce the first coat with the specified reinforcing scrim.
- For conservative planning, follow the linked technical sheet: recoat after at least twenty-four hours at 20°C and within seven days. At 10°C it specifies forty-eight hours to three days.
- If the permitted interval is exceeded, follow the manufacturer's preparation advice before continuing. Ensure the first coat remains clean and sound.
Limitations
Do not apply if rain is forecast within forty-eight hours, humidity exceeds 85%, or conditions are cold, static or saturated. Do not apply to wet or icy substrates. The system is not recommended for waterproofing gutters. Pay particular attention to lap joints and fixings on sheeted roofs. Use the Anti Slip version where the project requires textured access routes. Protect stored material from freezing and read the GB safety sheet.
Product FAQs
How many coats are required?
At least two coats at the stated coverage, with the first coat fully reinforced using the specified scrim.
Can it be used before rain?
Do not apply when rain is forecast within forty-eight hours. The roof must also meet the temperature and humidity limits.
When can I apply the second coat?
The linked technical sheet gives a minimum of twenty-four hours at 20°C, within seven days. At 10°C it gives forty-eight hours to three days.
Can it waterproof gutters?
The current technical guidance does not recommend Liquid Roof Membrane for gutters. Select a system specified for that application.
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.
