Cromar Hydrosil Silicone Roof Coating | 18.9ltr Tin | Grey

£329.98 Inc VAT

Direct Delivery
Delivery Time: 5 to 7 Working Days

 Nationwide Delivery

Delivery Time: 5 to 7 Working Days

Delivery costs are calculated in the checkout based on products and delivery address.

To read more about our delivery service click here.

Delivery Time: 5 to 7 Working Days
Product Description

Cromar Hydrosil Silicone Roof Coating – 18.9ltr Tin – Grey

Cromar Hydrosil is a professional grade, solvent-based, liquid-applied, single component, moisture‐cure premium silicone coating that has been specifically formulated to deliver direct‐bond adhesion as a restoration and maintenance coating over most common roof substrates and membranes.

Hydrosil forms a durable, vapor-permeable, watertight and weatherproof barrier that provides long-term resistance to degradation from natural weathering (including extreme temperatures, UV, rain and snow). The coating has excellent UV resistance and dries to a grey finish which keeps roof surfaces cooler preventing thermal shock and extending the life of the roof.

Independently tested and complies and/or exceeds all the requirements of ASTM D 6694 Standard Specification Liquid‐ Applied Silicone Coating used in Spray Polyurethane Foam Roofing Systems.

Hydrosil is approved for Class “A” Non‐Combustible credentials as tested under UL 790 Spread of Flame procedures over most common roofing substrates and membranes.

Note: For professional use only – do not dilute. We cannot assume liability for the results of customers’ use or a customer’s inability to properly use or apply this product.

Benefits of Hydrosil

  • Single Coat Application.
  • Superior Coverage.
  • No Primer required.
  • Fast cure time.
  • Highly durable long term protection.
  • Superior Adhesion.
  • Self levelling.
  • Unaffected by standing water.
  • Suitable for use on most common roofing substrates.

Coverage: 18.9ltr tin coverage = up to 23 square metres.


  • Hydrosil may be sprayed, rolled or brush applied.
  • Can be applied over surfaces that exhibit ponding water, however, it is advised that all roof systems be designed and built to ensure positive drainage.
  • The coating must be evenly applied and pinhole-free.
  • Hydrosil Coating should be applied at the recommended coverage of 1L/1.25sqm. Application rates must be checked periodically to ensure proper coating thickness. This may be done with a wet film gauge, or by checking coverage of a known quantity. The contractor should estimate coating requirements based on actual experience and needs to figure losses due to applicator experience, surface texture, wind, waste, and other factors increasing the estimated litres required.




Additional information


Delivery Costs

At Roofin Online, we offer Everyday Low Prices across an ever-expanding range of roofing and construction materials online. We offer a fast and direct nationwide delivery service, utilising an efficient mix of couriers, haulage and manufacturers’ transport, enabling us to offer competitive prices to our customers.

This means that our delivery costs are calculated in the basket and checkout, as they depend on the products (i.e. brand, quantity, weight, length etc) and the delivery address.

Delivery costs are based on delivery to a single address within the UK Mainland, excluding the Scottish Highlands and Islands where additional costs may apply.

Please see examples of our delivery costs below:

Standard Parcels from £5.95

Small items, such as Ridge Kits, Dry Verge Units and Small Gutter Components etc.

Long Items from £12.00

Long items, such as Cavity Closers, Membranes, Guttering, Continuous Verge and Pipe etc.

Palletised Delivery from £40.00

Heavier products like roof tiles, lead rolls, paving etc require palletised delivery.

Clear Amber Delivery

Orders under £200 + VAT = £40.00 + VAT
Orders over £200 + VAT = £30.00 + VAT

Specialist dedicated transport for large items like roof sheets (Corrapol, Axiome, Axgard, Alukap-XR, Alukap-SS, Snapa, Aluflow and Alupave).

Delivery Updates

When Ordering: We give estimated delivery times upfront on the individual product pages. These delivery times are given in standard working days, which are Monday to Friday from 09:00 until 17:00 (excluding Bank Holidays). After Ordering: We will provide you with more accurate delivery updates after we have processed your order, the information provided will depend on the delivery service that’s available for the products you order and will be sent to the email address you enter during checkout. We may provide a planned delivery date, tracking information or simply further instructions if updates are to come directly from a supplier or delivery partner. Before Delivery: Deliveries are made on commercial vehicles up to 18-tonne rigid lorries, so please let us know about access restrictions, safe places and further instructions ASAP, as failed deliveries may incur additional costs, especially for bulky or palletised deliveries. During Delivery: Small items will be delivered to your door via courier, however, bulkier items, will require a specialist or palletised services. Palletised deliveries will be made on a lorry equipped with a tail-lift and pallet truck, so the driver will unload your order and place it at the nearest road access point to the delivery address (kerbside delivery). The delivery drivers will not provide labour and physically move the building materials to where you need them, so please ensure that somebody with the ability and willingness to handle the goods accepts the delivery. Please keep in mind that if you order in the evening, a weekend or on a bank holiday then your order will be processed by a member of our team the next working day. For example, if you order at 6 pm on Friday, and the products are on a 1-3 Working Day delivery time. Then you will receive delivery updates when your order is processed/dispatched the following Monday, meaning that Tuesday would be delivery day number 1. You can read more about our delivery service by visiting our delivery information page.
SKU AHYDSIL/601 Categories , , Tag