Ronseal Isoflex Liquid Rubber (Black) 750ml
Flexible, waterproof roofing sealant with 20-year protection. Resists cracking & weather extremes. 750ml black liquid rubber.
The Ronseal Isoflex High-Performance Liquid Rubber offers an advanced, permanent, and flexible waterproof coating, specifically formulated for roofing applications. With 5 times greater flexibility than conventional bitumen coatings, it delivers extremely long-lasting protection against the elements.
This tough and durable coating resists cracking, perishing, and peeling, ensuring reliable performance across virtually all roofing surfaces—including metal, bitumen, felt, and more. It provides 20-year performance when applied with proper surface preparation and adheres securely to even weathered substrates.
Key Features:
- Superior Flexibility – Moves with roof expansion/contraction
- Weatherproofing – Impervious to rain, UV, and extreme temperatures
- Universal Application – Bonds to almost any roofing material
- Long-Term Protection – 20-year performance with correct application
- Permanent Waterproof Seal – Forms a continuous rubberised barrier
Available in a deep black finish, this 750ml variant is ideal for small to medium roof repair or waterproofing tasks.
After bigger quantities? Need extra quantities? Get in touch and we'll organise it for you.
- +14
- Dispatched within 0-2 business days
- Delivery to United States: 3-5 business days*
- Free Shipping Included
- **Metal roofing** (corrugated sheets, flashings)
- **Flat roofs** (bitumen, felt, EPDM)
- **Gutters & downpipes** (sealing joints)
- **Chimney stacks & vents** (weatherproofing)
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- **Material:** Acrylic-rubber hybrid
- **Performance Life:** Up to 20 years (with preparation)
- **Flexibility:** 5× higher than bitumen coatings
- **Weather Resistance:** UV-, frost-, and rainproof
- **Coverage:** Varies by surface (check packaging)
- **Colour:** Black
- **Size:** 750ml
- **Weight:** 904g
Hazard information
P102
Keep out of reach of children.
P271
Use only outdoors or in a well-ventilated area.
H335
May cause respiratory irritation.
P280
Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
P405
Store locked up.
GHS02
Flammable
GHS07
Health hazard/Hazardous to the ozone layer
H226
Flammable liquid and vapour.
H336
May cause drowsiness or dizziness.
H317
May cause an allergic skin reaction.
H412
Harmful to aquatic life with long lasting effects.
GHS08
Serious health hazard
H332
Harmful if inhaled.
P304 + P340
IF INHALED: Remove person to fresh air and keep comfortable for breathing.
H334
May cause allergy or asthma symptoms or breathing difficulties if inhaled.
H351
Suspected of causing cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
P342 + P311
If experiencing respiratory symptoms: Call a POISON CENTER/doctor/…
Documents
Always follow local regulations and product guidance.
Free standard delivery on Australian mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For faulty items, contact us within 14 days for a replacement or refund.
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