Isoflex Professional Liquid Rubber - Black

A professional quality and long lasting liquid rubber ideal for the protection and repair of roofing felt, slates, tiles, concrete, brick, corrugated iron, lead and copper. 5x more flexible than traditional bitumen coatings, it provides up to 20 years of protection. Specially formulated to form a flexible finish that flexes with the natural movement of the roof to not crack or peel.

• Tough, durable finish
• Up to 20 years protection
• Flexes with the natural movement of the roof
• More flexible than traditional bitumen paint

Always ensure the area to be painted is completely dry and free from dust, dirt and anything that may affect adhesion.

• Treat any fungal growth with an appropriate fungicidal wash and allow to dry.
• Fill any cracks and voids with a mastic filler or appropriate filler.
• Cut open any felt blisters and apply Isoflex Liquid Rubber underneath and secure with felt tacks.
• Difficult surfaces that are dusty, flaking or porous can be primed with Isoflex Special Primer.
• Where major joint movement may occur apply Special Primer allow to dry and apply a coat of Liquid Rubber. Embed a reinforcing scrim bandage across the joint ensuring to press out any wrinkles or bubbles. Treat right angles between horizontal and vertical surfaces similarly.

Always perform a test on a small inconspicuous area to ensure compatibility, and we recommend following the manufacturer's instructions found on the tin.

• Stir well before and during use, do not dilute.
• Each coat should not be less than 0.5mm and should not exceed 1mm in thickness. Build up areas where ponding is likely to occur with additional coats.
• Mark out the area into square metre areas and pour out the appropriate amount of Liquid Rubber at a rate of half a litre per square metre for a 0.5mm coat.
• Spread evenly across the area using a brush, ensure not to overspread.
• Allow to dry for 12-24 hours and apply a second coat within 24 hours to ensure the chemical bonding between the two coats.
• Allow 14 days before applying any water based treatments such as emulsion paints.

The colour of the coating may begin to grey with time but this does not affect the performance.

Delivery - All orders placed on a working day before 3pm will be dispatched on the same day for next working day delivery. Orders placed before 3pm on Friday will be delivered on Monday (excluding bank holidays). Orders placed on weekends and Bank Holidays will be dispatched on the next working day. 

Delivery of Tinted Products - Tinted paints are dispatched in line with our express order process, shown below. However, due to their bespoke nature, please allow up to an additional 5 working days to accommodate any potential courier delays or delivery issues before receiving a refund or replacement.

We strongly suggest customers avoid booking tradespeople until they receive their order. Next Day Paint will not be held liable for any costs incurred due to order processing errors, delivery delays, or other issues that may result in financial loss.

Delivery Options

Express Shipping - £3.99

Order by: 3pm, Monday - Sunday

Expected delivery: Next working day, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

AM Delivery - £12.99

Order by: 2pm, Monday - Sunday

Expected delivery: Next working day by 2pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following AM

Late Cut-Off - £5.99

Order by: 4pm, Monday - Friday 

Expected delivery: Next working day, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

Saturday Delivery - £9.95

Order by: 2pm, Friday 

Expected delivery: Saturday, 8am - 9pm

Standard Delivery (Out of Zone Postcodes Only) - £6.99

Order by: 3pm, Monday - Sunday 

Expected delivery:  3-5  working days, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

We do not deliver to the Channel Islands or the Republic of Ireland

Certain postcodes delivery times and charges may vary please head to the cart to see your available delivery options.

Returns

We offer a 14 day money back guarantee for all goods shipped correctly that are not required. If the item is not required, please send the item back for a full refund in its original condition, unused with its original packaging. Please note return for unwanted item is at your own expense.

Contact us as soon as possible to inform us you will be returning the product either by a contact form or by calling our team on 0161 960 0217.

All tinted paint purchases are final and non-refundable. If you're unsure about your selection, please refer to the product listing or contact us for guidance before ordering. Once mixed, tinted paints cannot be returned or refunded, regardless of delivery delays or changes in circumstances.

While we aim to meet delivery timelines, we are not responsible for delays caused by couriers, weather, or other external factors.

We recommend ordering samples or colour charts before purchasing. While we strive to represent colours accurately, screen settings and surface types can affect appearance. Opened tins cannot be returned due to dissatisfaction with colour.

For non-tinted products, we offer a 14-day money-back guarantee. Items must be returned unused, in original condition and packaging, at your own expense.

Damaged Paint

Please visit our damages page, where we can help resolve the issue for you. 

Incorrect Item

If we have sent you a different item from what you ordered, we will be happy to organise an exchange for the correct goods at no extra charge to yourself, please get in touch to organise this.

Faulty Items

Faulty items can be refunded or exchanged within 30 days. All returns are tested, and if no fault is found, no refund will be issued you'll have the option to have the item returned. For faults discovered after 30 days, please contact the manufacturer for further support.