Watco Concrex Acid Strength
Litres required: 0.00L
Based on 0.12 m² per litre- Lightwork of heavy-duty repairs
- Structural strength solutions
Watco Concrex Acid Strength is a two-part epoxy repair mortar for acid-damaged concrete floors, ramps and steps. It is intended for working areas where strong chemicals are handled or stored, and where a patch needs to cope with both traffic and chemical exposure.
The mortar is trowelled into local damage and can be feathered around the perimeter. Once cured, it leaves a hard, non-dusting repair. Watco’s resistance table covers a range of acids, including sulphuric acid at 95% concentration. Check the table for the chemical, concentration and exposure period before specifying the repair.
Surface Preparation
Remove loose concrete, dust, grease and other contamination. Brush or sweep the sides and base of the defect until you reach a sound surface. Rough, dry patch repairs usually need no primer. Use Watco Tack Coat for thin screeds and smooth, non-porous or metal surfaces. Watco also specifies Tack Coat where the substrate is damp.
Technical Data
- Coverage is approximately 1.2m² per 10kg at 5mm thick.
- Normal repair depth is 5–50mm. Feather the edge where most of the repair is at least 5mm thick.
- Minimum application temperature is 10°C.
- Working life is about 60 minutes at 15°C.
- Allow 6 hours for light traffic at 20°C or 8 hours at 15°C. Allow at least 16 hours for heavy traffic at 15–20°C.
- Allow 7 days to reach full chemical resistance.
Directions for Use
Read the pack instructions and safety sheets before mixing. Tip the resin and aggregate blend onto a clean mixing board or tray. Add the curing agent and work it through the aggregate until the mortar has an even colour and texture. For part packs, follow Watco’s proportions and use whole curing agent containers.
Compact the mortar into the defect with a steel trowel and finish it flush with the adjacent surface. For a repair deeper than 50mm, apply in layers and allow 6–8 hours between layers. Clean tools before the mortar sets.
Limitations
Remove food products during application and cure. Keep the finished repair below the manufacturer’s 60°C maximum and avoid steam cleaning. The traffic times and chemical resistance times are separate. Schedule chemical exposure around the seven-day cure.
Product FAQs
Will it resist sulphuric acid?
Watco rates resistance to 95% sulphuric acid as excellent in its published tests up to 28 days. Check the technical sheet for your exposure conditions and allow seven days for full chemical resistance.
When can the floor reopen?
Allow 6 hours for light traffic at 20°C or 8 hours at 15°C. At 15–20°C, allow at least 16 hours before heavy traffic.
Do I need a primer?
Rough, dry patches usually need none. Use Tack Coat for smooth, non-porous, metal or damp surfaces and thin screeds.
How much will a pack cover?
About 1.2m² per 10kg at 5mm. Deeper holes require more material.
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.
