Customer support that's actually human.

Orders are dispatched within 1–2 business days from our London 3PL warehouse. Delivery typically takes another 1–2 working days via Royal Mail, DPD, or DHL depending on order size.

You'll receive a tracking link by email as soon as your order is dispatched.

We currently ship to UK addresses only via innerseal.co.uk. For trade or export enquiries outside the UK, email us directly — we can advise on options.

Yes. Free standard UK delivery on every order, no minimum spend.

If your package is visibly damaged on arrival, photograph it before opening and email us with your order number. We'll arrange a replacement immediately — no quibbles.

If the container itself is leaking or compromised, do not attempt to use the product. Set it aside in a contained area and send us photos.

Once your order ships, you'll receive an email with a tracking link from Royal Mail, DPD, or DHL. If you haven't received a tracking email within 2 business days of ordering, email us with your order number and we'll chase it.

We accept all major debit and credit cards (Visa, Mastercard, American Express, Maestro), Apple Pay, Google Pay, Klarna, and Link by Stripe. Payments are processed securely by Stripe — we never see your card details.

Yes. Every order generates an automatic email receipt. For a formal VAT invoice with your company details, email us with your order number and we'll send one over.

For trade and business orders over £500, we can arrange invoice or purchase order payment terms. Email us with your company details and we'll set up an account.

Yes. All payments are processed by Stripe using bank-grade encryption. Innerseal LTD never sees, stores, or has access to your card details. Stripe is PCI-DSS compliant.

Unopened containers can be returned within 14 days of delivery for a full refund. The product must be in its original sealed packaging and in resalable condition. Return shipping is the customer's responsibility unless the product was damaged or incorrectly supplied.

To start a return, email us with your order number.

Full details on the Shipping and Returns page.

If you believe the product is defective — wrong consistency, damaged seal, incorrect labelling — stop using it immediately and email us with photos. We'll replace it at no cost and cover return shipping.

Once opened, containers cannot be returned for a refund — the product becomes unsuitable for resale. The only exception is if the product is defective (see above).

If you've ordered the wrong size by mistake, email us before opening it and we'll arrange an exchange.

Once we receive the returned product and confirm it's in resalable condition, refunds are processed within 3–5 business days. The amount usually appears on your statement within 7–10 days depending on your bank.

No. Innerseal is designed for DIY application. For walls, you'll need a low-pressure garden sprayer. For floors, just pour it on and spread with a soft broom or squeegee. No specialist equipment or training required.

Both the substrate and ambient temperature should be above +5 °C during application and curing. Don't apply in freezing conditions or just before frost is expected.

Summer is ideal, but spring and autumn work fine in the UK as long as you're not in a cold snap.

Coverage is approximately 3 m² per litre across two coats. So:

• 1 × 5L covers up to 15 m² (small project)
• 1 × 20L covers up to 60 m² (larger or multiple surfaces)

The calculator on each product page gives you an exact recommendation based on your project size.

Yes. Innerseal can be applied to substrates that are damp to the touch — it actually penetrates better when there's some moisture present. Don't apply to standing water or fully saturated surfaces.

Yes — email us with photos of the surface and a description of the problem. We'll tell you honestly whether Innerseal is the right solution or whether you need something else.

Yes. For orders of 3+ × 20L containers (180+ m² of coverage), we offer trade pricing. Email us with your project details and we'll send a quote.

For larger ongoing supply arrangements with contractors or specifiers, we can also set up account terms.

Yes. We can deliver pallet quantities anywhere in the UK on dedicated pallet courier services. Lead time is typically 3–5 business days. Contact us for a quote.

All four core documents — TDS, SDS, Declaration of Performance, and CE Marking — are downloadable from the Documentation page.

For full independent test reports from TÜV Rheinland, Aqualogy, CBI, TU Munich, SINTEF, and others, email us. Detailed reports are shared directly with specifiers and architects working on specific projects.

Yes. We work directly with specifiers, architects, and contractors on UK projects. Send us project details — substrate, square metres, intended use — and we'll respond with technical guidance and product recommendations.

Yes. Innerseal is certified to EN 1504-2 (Surface protection systems for concrete) and carries CE marking under DoP no. 1111-CPD-0556. Following UK Government policy in 2024–2025, CE marking continues to be accepted indefinitely for construction products in Great Britain.

Full standards information on the Documentation page.