Kenbro Bitumen Primer BF4 – Solvent Based Bitumen Primer 5 Litre
Kenbro Bitumen Primer BF4 – Solvent Based Bitumen Primer 5 Litre
A fast-penetrating, solvent based bitumen primer made in Kenya by Kenbro Industries. It seals and bonds concrete surfaces so torch-on membranes and bitumen waterproofing coatings stick firmly – and it doubles as a protective coating for metal.
Product Overview
Kenbro Bitumen Primer BF4 is a solvent based bitumen primer designed for priming concrete surfaces before bitumen based waterproofing. The low-viscosity liquid soaks into the pores of concrete, screed and plaster, binds loose dust and leaves a tacky bituminous film that gives waterproofing membranes and coatings a strong, long-lasting grip.
Whether you are waterproofing a flat concrete roof, a balcony, a basement wall, a water tank base or a foundation, priming with BF4 is the step that stops membranes from lifting, blistering or peeling. It is also suitable for coating and protecting steel and other metal surfaces against moisture and corrosion.
Technical Specifications
| Product Name | Kenbro Bitumen Primer BF4 |
|---|---|
| Brand / Manufacturer | Kenbro Industries Ltd, Nairobi, Kenya |
| Product Type | Solvent based bitumen primer |
| Pack Size | 5 Litre jerrican |
| Colour | Black |
| Form | Liquid, ready to use after stirring |
| Base | Bitumen in organic solvent |
| Coverage Rate | Approx. 0.15 litres per m² per coat, depending on surface |
| Recommended Coats | Two thin coats, second coat at a right angle to the first |
| Application Method | Brush or roller |
| Suitable Surfaces | Concrete, screed, plaster, masonry and metal |
| Compatible Systems | Torch-on bitumen membranes, bitumen emulsions and bitumen based waterproofing coatings |
| Tool Cleaning | Thinner, while still wet |
| Hazard | Flammable – keep away from flames and sparks |
Key Features & Benefits
Deep Penetration
Thin solvent carrier soaks into porous concrete and plaster for a firm key.
Stronger Membrane Bond
Prevents torch-on membranes and bitumen coats from lifting and blistering.
Dust Binding
Locks down fine surface dust that would otherwise weaken adhesion.
Metal Protection
Forms a protective bituminous film on steel against moisture and rust.
Easy Application
Goes on smoothly with an ordinary brush or roller – no special equipment.
Economical Coverage
A little goes a long way when applied in thin, even coats.
Locally Manufactured
Made in Nairobi by Kenbro and suited to Kenyan site conditions.
Handy 5L Pack
Sealed jerrican with carry handle – ideal for homes and medium sites.
Applications
- Priming flat concrete roofs and slabs before torch-on bitumen membrane installation
- Balconies, terraces, parapets and concrete gutters
- Basement walls, retaining walls and foundations before bitumen tanking
- Bathrooms, wet areas and shower trays before bitumen based waterproofing
- Concrete water tank bases, planters and septic chambers
- Coating and protecting steel pipes, metal tanks, posts and fabricated metalwork
How to Use Kenbro Bitumen Primer BF4
Safety & Storage
- The product is flammable – no smoking, open flames or sparks during use and while drying.
- When torching membranes, make sure the primer is completely dry first.
- Work in a well-ventilated area and avoid breathing the vapours.
- Avoid contact with the eyes. If contact occurs, wash immediately with plenty of water.
- Wear gloves and eye protection during application.
- Keep the container tightly closed, stored in a cool, shaded place, and out of reach of children.
Frequently Asked Questions
What is Kenbro Bitumen Primer BF4 used for?
It primes concrete before bitumen based waterproofing such as torch-on membranes and bitumen coatings, and also coats and protects metal.
Do I really need a primer before torch-on membrane?
Yes. Primer binds surface dust and seals the pores so the membrane bonds fully. Skipping it is one of the main causes of membranes lifting and leaking.
Can I apply it on damp concrete?
No. The surface must be dry, and new concrete or plaster should be allowed to dry out before priming.
Can BF4 be used on metal?
Yes – it is suitable for metal coating and protection, such as steel pipes, tanks and posts.
Do you install waterproofing?
Shabbiri Hardware supplies materials only. We are happy to share contacts of independent waterproofing installers.
Where can I buy it in Nairobi?
At both Shabbiri Hardware branches on Magadi Road – Ongata Rongai and Tuala.
Find Us – Two Branches on Magadi Road
Ongata Rongai Branch
Magadi Road, opposite Hashi Petrol Station, Ongata Rongai, Nairobi
Tuala Branch
Magadi Road, past Nazarene University, Tuala, Nairobi
Contact Shabbiri Hardware
Trusted hardware and building materials supplier since 1990. Call, WhatsApp or email us for availability and bulk orders of Kenbro Bitumen Primer BF4 and other waterproofing products.
Specifications
| Brand | Bitumen |
| Model | BF4 |
| Category | Waterproofing & Sealants |
| Availability | In stock |
| Sourced by | Shabbiri Hardware Kenya Limited |
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