Watco Concrex Sub Zero
Litres required: 0.00L
Based on 0.12 m² per litre- Lightwork of heavy-duty repairs
- Structural strength solutions
Watco Concrex Sub Zero is a polyaspartic concrete repair mortar for damaged floors in freezers, cold stores and unheated industrial areas. It cures at temperatures down to -20°C, making it a practical choice for repairs where ordinary mortars would struggle to harden.
Use it to fill holes, restore worn concrete and repair damaged edges on concrete, metal and sand and cement screeds. The resin, curing agent and blended aggregate form a trowel-applied mortar that can be finished flush with the surrounding surface. Its mid-grey finish suits a wide range of working floors, from chilled storage areas to exposed maintenance spaces.
Surface Preparation
Remove loose material, dirt, grease and contamination. Wire brush and sweep the repair until the substrate is clean, dry and sound. Pay attention to the sides and base of holes so the mortar can bond to a firm surface.
A primer is not normally required for rough holes. Use Watco Tack Coat Sub Zero for smooth surfaces, thin screeds, intricate repairs and areas subject to high impact, such as step nosings. Follow the primer's instructions before applying the mortar.
Technical Data
- Pack size: 10kg; colour: mid-grey.
- Composition: three-component polyaspartic resin repair mortar.
- Coverage: approximately 1.2m² per pack at 5mm thick.
- Normal application depth: 5–50mm.
- Minimum application temperature: -20°C.
- Working life: approximately 30–60 minutes, depending on temperature.
- Typical cure: 48 hours at -20°C, 16 hours at 0°C and 5 hours at 15°C.
- Shelf life: 12 months in unopened containers.
Directions for Use
Mix the two liquid components thoroughly, then combine with the aggregate on a suitable mixing board. Work the materials together until the colour and consistency are uniform, with no unmixed pockets.
Press the mortar firmly into the prepared repair, compacting against the edges. Finish with a steel float or trowel. Wiping the blade with white spirit helps reduce drag. For repairs deeper than 50mm, build up in layers and allow each layer to cure before continuing.
Limitations
Feather edges only where the main body of the repair is at least 5mm thick. Coverage depends on repair depth and surface profile; deeper holes require proportionately more material. Allow for slower curing at lower temperatures before returning the area to service. Store between 10°C and 30°C and protect from freezing.
Product FAQs
Can Concrex Sub Zero cure in a freezer?
Yes. This grade is designed to cure at temperatures down to -20°C. Typical curing time at -20°C is 48 hours; allow suitable time before putting the repair back into service.
Does it need a primer?
Rough holes do not normally need priming. Tack Coat Sub Zero is recommended on smooth surfaces, for thin screeds and for intricate or high-impact repairs such as step nosings.
How much area will one pack repair?
A 10kg pack covers approximately 1.2m² at 5mm thick. Coverage decreases as the repair depth increases.
Can I fill a hole deeper than 50mm?
Build repairs deeper than 50mm in layers, allowing each layer to cure. The normal application depth is 5–50mm.
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.
