Experts in DIY Waterproofing solutions since 1975. #It Just Works! As part of the STT Sales Group, the brand has strong credentials in the waterproofing sector.
Flash Harry is one of South Africa’s leading DIY waterproofing brands, incorporating a range of over thirty purpose-specific waterproofing and damp proofing related products. It was developed and is still manufactured in South Africa, and has been specifically formulated for the African market, tested to withstand the continent’s harshest weather conditions. STT Sales is one of the country’s leadi
14/08/2026
Well, this made our day. 🥇
Flash Harry has been awarded Gold – Waterproofing Supplier Company for 2026 by the Essential Group.
We talk a lot about being Tried. Tested. Trusted.
It’s rather nice when somebody else says it too. 😉
A huge thank you to the Essential Group — and to the entire Flash Harry team who made this possible.
51 years on, and still doing what we love.
12/08/2026
When you need more than a tough claim, choose a proven solution. 💪
Liquid Plastic Plus is a thick, heavy-duty, fibre-reinforced, rubberised waterproofing solution that forms a seamless, impermeable barrier, backed by a 12-year guarantee.
For hardware stores, it’s a proven product from a trusted name.
For DIYers and contractors, it’s serious waterproofing designed for serious weather, easy to apply and available in a range of colours.
Flash Harry has been solving South Africa’s waterproofing problems since 1975.
https://flashharry.co.za/products/liquid-plastic-plus
Liquid Plastic Plus Professional DIY waterproofing products
05/08/2026
Talking tough is easy.
Twelve years of experience says more.
Liquid Plastic Plus is a thick, heavy-duty, fibre-reinforced, rubberised waterproofing solution that forms a seamless, impermeable barrier, backed by a 12-year guarantee.
For hardware stores, it’s a proven product from a trusted name.
For DIYers and contractors, it’s serious waterproofing designed for serious weather, easy to apply and available in a range of colours.
Flash Harry has been solving South Africa’s waterproofing problems since 1975.
https://flashharry.co.za/products/liquid-plastic-plus
Tough isn’t something you say.
It’s something you prove. 💪
Liquid Plastic Plus is a thick, heavy-duty, fibre-reinforced, rubberised waterproofing solution that forms a seamless, impermeable barrier, backed by a 12-year guarantee.
For hardware stores, it’s a proven product from a trusted name.
For DIYers and contractors, it’s serious waterproofing designed for serious weather, easy to apply and available in a range of colours.
Flash Harry has been solving South Africa’s waterproofing problems since 1975.
https://flashharry.co.za/products/liquid-plastic-plus
10/07/2026
The key to getting it right.
The difference between a repair that lasts and one that fails often comes down to one thing... adhesion.
Flash Harry Bond & Key helps create stronger, longer-lasting bonds by:
• Improving adhesion to concrete, plaster and mortar
• Increasing strength in cement mixes
• Helping new surfaces bond to old
• Suitable for interior and exterior applications
It's the simple addition that makes a big difference.
Flash Harry Bond & Key. The key to stronger, lasting bonds.
https://flashharry.co.za/products/bond-and-key
07/07/2026
Meet the missing link.
Introducing Flash Harry Bond & Key – our high-performance Bonding Liquid & Admixture.
Designed to improve adhesion, increase strength and create stronger bonds between old and new surfaces, Flash Harry Bond & Key helps your next project stand the test of time.
Whether you're repairing concrete, plastering, screeding or preparing a surface, Flash Harry Bond & Key gives your work the solid foundation it deserves.
Because when every layer works together... It Just Works.
https://flashharry.co.za/products/bond-and-key
03/07/2026
Vandal resistant? Maybe not.
Water resistant? Absolutely.
Rain, leaks and moisture don't stand a chance against Flash Harry, waterproofing that just works!
03/07/2026
Something new is coming...
For over 50 years, Flash Harry has built a reputation for waterproofing products that simply Just Work.
Now we're adding something new to the mix.
Something that helps every repair, every screed, every plaster mix and every project perform even better.
Stay tuned. You won't have to wait long.
| Monday | 07:00 - 16:00 |
| Tuesday | 07:00 - 16:00 |
| Wednesday | 07:00 - 16:00 |
| Thursday | 07:00 - 16:00 |
| Friday | 07:00 - 15:00 |