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Google Reviews

Silicon

Name: Silicon
Brand: Mighty Structural
SKU: WOO-1578
Price: 5.04 GBP
Availability: InStock

SKU: WOO-1578 Accessories

£5.04 inc VAT

Silicone Sealant for Metal Roofing, Buy Online UKHigh-performance silicone sealant for sealing joints, overlaps, and fixings on metal roofing sheets… Read more ↓

What Our Customers Say

Moira O'Neill

5th June 2026

Jimmy at Mighty pulled out all the stops to get me my metal sheeting promptly so i could finally get my roof on, after I'd experienced long delays with other companies. The service was efficient and friendly, and the product was exactly what I was looking for. Thankyou!

valerie astrop

29th May 2026

Hi Had absolutely first class service from Mighty with my small order for metal box roofing sheets. Do not hesitate to contact them.

Darius Roman

28th May 2026

Ordered some roofing sheets and the quality seems very good. Delivery took a bit longer than expected due a small incident but the company was kind enough to provide an extra sheet that was initially damaged during loading. Received the wrong invoice twice. Was told on several occasions this would be correct and reissued but haven't received it to date.

Mike Parker

21st May 2026

The BEST company I have ever delt with (and I'm 52). They are so helpful and professional ! Nothing is too much trouble for them. Qualitly of roofing was outstanding. If you are looking around, STOP you've already found the best place. Mike Parker

Steve Oldfield

14th May 2026

Great experience purchasing my metal cladding from these guys! Excellent value, superb quality and very quick turnaround. All items arrived safely with no issues. Brilliant service from start to finish, will definitely recommend and use you guys again when I need to. Cheers!

alan king

1st May 2026

I purchased new roofing sheets for my double garage they were delivered in under 2 weeks. The driver was spot on the time stated and very helpful. He gave me some good advice which I used . The product I used is fantastic and I would recommend anyone to contact mighty if you are thinking of replacing a roof. From the moment I placed the order the service I received was brilliant. The job is done and looks great, thanks to everyone at mighty. Alan king. Farnborough Hampshire.

Details

Silicone Sealant for Metal Roofing, Buy Online UK

High-performance silicone sealant for sealing joints, overlaps, and fixings on metal roofing sheets and flashings. UV-resistant formula provides a long-lasting, weatherproof seal that stays flexible through seasonal temperature changes. Ideal for use with box profile, corrugated, and tile effect roofing sheets.

Type: Neutral cure silicone sealant
Coverage: Approximately 12 linear metres per tube
Properties: UV-resistant, permanently flexible
Colours: Clear and colour-matched options available
Suitable for: All metal roofing profiles and flashings

Specifications

Category: Accessories

Why Choose Mighty Structural?

25+ Years Experience

Trusted manufacturer and supplier of quality roofing products since the late 1990s.

National Delivery

Fast, reliable delivery across the UK. Delivered in 7-10 working days.

Made to Measure

Custom-cut sheets to your exact length requirements. No waste, perfect fit every time.

Trade Prices

Competitive trade pricing with over 1,000 tonnes of stock available for immediate dispatch.

Frequently Asked Questions

How do I measure for roofing sheets?

Measure the length of your roof from ridge to eave, adding 50-75mm for overhang at the eave. For width, our sheets provide 1 metre of coverage after overlap, so divide your roof width by 1m to calculate the number of sheets needed. Always round up to the nearest whole sheet.

What is the difference between Plastisol and Polyester coatings?

Plastisol (PVC 200 micron) is a thicker, textured coating offering superior scratch and corrosion resistance. It provides a longer lifespan and is ideal for harsh environments. Polyester (25 micron) is a thinner, smoother finish with a wider colour range at a more affordable price. Both coatings provide excellent weather protection for roofing and cladding.

Do you offer trade or bulk discounts?

Yes! We offer competitive trade pricing on all our products. For large orders or ongoing trade accounts, please call us on 01922 649795 or request a quote for the best possible price.

What is the anti-condensation membrane?

The anti-condensation membrane is a fleece backing applied to the underside of roofing sheets. It absorbs moisture from condensation, preventing water dripping inside your building. It then releases the moisture back into the atmosphere when conditions improve. It is highly recommended for agricultural buildings, garages, and any unheated structure.

What profiles do you offer?

We stock three main profiles: Box Profile (32/1000) for a modern, clean appearance with excellent strength; Corrugated (13/3) for a traditional look ideal for agricultural and garden buildings; and Tile Effect for a classic tile appearance without the weight. All profiles are available in a range of colours and thicknesses.