Thermoguard Intumescent Mastic
- Protect your surfaces from fire & smoke
- Structural strength solutions
Thermoguard Intumescent Acoustic Mastic is a one-part, acrylic-based sealant designed to expand under heat to form a fire-resistant char. Used to seal joints and openings around fire doors, window frames and service penetrations in floors and walls, it helps reinstate fire resistance and provides acoustic and air permeability benefits. Independently tested to BS and EN standards.
Fire Performance:
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EN 1366-3:2009 (penetration seals)
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EN 1366-4:2006 (linear joint seals)
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Tested With: Metallic pipes, cables, cable trays, cable bunches, and more
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Max Joint Size Tested: 490mm x 150mm
Refer to the full installation guide for specific configurations, performance tables, and fire-resistance ratings.
Surface Preparation
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Ensure joints, voids, and service openings are clean and free from dust, grease, and debris.
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Compatible with block walls, concrete, masonry, plasterboard, and more.
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Suitable for flexible and rigid walls and floors.
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Recommended: test adhesion on unusual substrates before full application.
Technical Data
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Density: 1.63 g/cm³
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Appearance: Paste, matt finish
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Shore A Hardness (after curing): 63/39
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Movement Capability: ≤ 7.5%
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Operating Temperature: -5°C to 40°C
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Longevity (Firestop Materials): 30 years
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Shelf Life: 18 months (from manufacture date)
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Acoustic Isolation: Up to 63dB (EN 10140)
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Air Permeability: 0.0/0.0 m³/h/m² @ 100Pa (EN 1026)
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Fire Classification: EN 13501-2
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Certifications: CE Marked, Certifire Approved, UL-EU Listed
Directions for Use
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Application Method: Gun or trowel sealant into joints or apertures, using backing materials as required (e.g., PE open-cell foam).
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Joint Widths: Suitable for gaps up to 50mm wide.
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Installation Conditions:
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Rigid walls (≥100mm): Concrete/masonry ≥ 650kg/m³
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Rigid floors (≥150mm): Concrete/masonry ≥ 650kg/m³
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Flexible walls (≥100mm): Timber/steel studs with 2x 12.5mm Gypsum boards
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Apply in internal conditions ≥85% RH (Type Z conditions per ETAG 026-3)
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Backer Rod: Use as depth gauge where required.
Data Sheets / Downloads
Thermoguard Intumescent Mastic - TDS
Thermoguard Intumescent Mastic - MSDS
Declaration of Performance (PS)
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.
