Renovate damp masonry yourself

Seal & dry wet walls sustainably with high-tech DIY solution with up to 70% cost savings & guaranteed effectiveness.

To the Isofin® product details

Renovate damp masonry yourself

Seal & dry wet walls sustainably with high-tech DIY solution with up to 70 % cost savings & guaranteed effectiveness!

To the Isofin® product details

Against rising and laterally penetrating moisture

Capillary water barrier
polymer-based

20 years
guaranteed effect

Forget everything you know about moisture protection. Isofin® sets new standards.

Professionally renovate damp walls yourself - without excavating the exterior wall - with a solution that even reaches areas that conventional methods cannot cover.

Isofin® the high-tech solution for wall waterproofing -
Hydrophobic polymer-based capillary water barrier.

Isofin® is effective against rising and laterally penetrating moisture

Effective in depth: Reaches up to 12 cm into the masonry.

DIY-friendly: Easy to use without special tools.

Time saving: visible results in just 2 weeks.

Cost efficiency: Up to 70 % cheaper than conventional methods.

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How Isofin® stops damp in walls - watch the video and save on renovation costs!

With Isofin® ...
  • Prevent black mold
  • Minimize health risks
  • Reduce energy costs

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Poster

DIY - DO IT YOURSELF

Dry walls in 3 steps

1. drill holes to fit

Start by drilling 12 mm holes at a 45° angle into your masonry at 25 cm intervals in the damp areas.

2. place Isofin® bottles

Then insert the Isofin® bottles into the drilled holes so that the water repellent can penetrate the wall.

3. allow the wall to dry

Once Isofin® has spread, allow the wall to dry. In this way, you are effectively protected against moisture after a short time.

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DIY solution Isofin® vs. uncovering:
A direct comparison
Comparison table
DIY solution with Isofin®
External sealing
Simple: DIY-capable, without specialist personnel or expensive machines.
Complex: Requires professional contractors and expensive machinery.
Cost-effective: No high costs for construction work or machinery.
Expensive: High costs for labor, machinery and soil restoration.
Fast: Dry in a few weeks, without major intervention.
Lengthy: Weeks to months of work, depending on the weather and terrain.
Minimally invasive: no destruction of walls or external areas.
Invasive: Requires exposure of the foundation and intervention in the surrounding area.
Durable: 20-year guarantee with capillary-breaking technology.
Depending on implementation: quality of sealing varies, repairs often necessary.
Can be used all year round: Independent of the weather thanks to the DIY process.
Weather-dependent: Cannot be carried out in rain, frost or difficult ground conditions.
Also for interior walls: Ideal for cellars or areas that are difficult to access.
For external walls only: Internal areas cannot be sealed.

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What is Isofin®?
Before
Afterwards

Before and after treatment with Isofin®

Isofin® is a purely organic, water-free, hydrophobic, polymer-based capillary water barrier that allows you to get your moisture problem under control on your own and save money in the process. Isofin® is effective against rising damp and laterally penetrating damp. It penetrates deep into the masonry and forms an invisible barrier that effectively repels non-pressing moisture. By simply inserting the Isofin bottles into pre-drilled holes, the product is distributed evenly and thus ensures complete protection. This not only preserves the building fabric of your home, but also increases your well-being through a dry and healthy indoor climate.

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What our DIY customers say:

I have been a DIY enthusiast for over 40 years and was really impressed with Isofin. The instructions were easy to understand and the product works perfectly. Our walls are dry, and best of all, I didn't have to have any exterior walls exposed. Our eldest has already ordered it and is just as enthusiastic as I am!

- Karl S., 67, from Munich

I used Isofin® for damp basement walls. My German is not so good, but the instructions were simple and everything worked well. Now the wall is dry, mold is gone and I am very satisfied. Isofin® is really professional and easy for do-it-yourselfers like me.

- Igor K., 43, from Espelkamp


 

Damp walls and mold have annoyed us for years. With Isofin, I took the problem into my own hands and fixed it for a fraction of the cost. The best thing is that it looks like a professional did the work.

- Thomas R., from Hamburg

I discovered Isofin online and suggested that my husband try it out. He was skeptical at first, but when we worked on it together, he was totally enthusiastic. Now the walls are dry and he's really proud of the result - and I think he appreciates my ideas a bit more now.


- Sandra W., 38, from Bremen

I was skeptical whether I could do it myself, but Isofin convinced me. With the clear instructions, I was able to renovate our damp basement walls myself. Now everything is dry - and at a fraction of the usual cost.

- Simone Hellhaus, from Gehlenbeck

I tried Isofin because I wanted to save on expensive tradesmen - and it was the best decision! It was very easy to apply and our cellar walls are finally dry. My neighbor has the same problem and now wants to try it too.

- Frank L., from Dortmund

After seeing the first signs of damp in our basement, I wanted to tackle the problem head on. Isofin was the perfect choice. It was easy to apply and now I am reassured that no major damage can occur. The best thing is that I treated the inside walls at the same time - for complete protection.

- Sven M., 37, from Stuttgart

I wanted to ensure that our house would remain free of moisture in the future. With Isofin, I have found a professional solution that is both effective and easy to use. After using it for the first time two years ago, I have now treated more interior walls to really be on the safe side. The quality speaks for itself.

- Marcel R., 46, from Bielefeld

"I used Isofin because the damp in our walls was making the indoor climate really unpleasant. Now everything feels much better and we can breathe easy again. Simply great!"

- Frank S., 41, from Kassel

After spending a lot of money on tradesmen during a previous renovation, I wanted to do it myself this time. Isofin impressed me - for a fraction of the cost, I was able to create a high-quality capillary barrier that works even better than the previous solution. I finally have the feeling that I've put my money to good use.

- Markus F., 41, from Düsseldorf

We had a quote of over €43,000 for uncovering and sealing our exterior walls - that was simply far too expensive. With Isofin, we found a professional solution for a fraction of the cost. Our walls are now dry and I'm glad we chose Isofin.

- Andreas L., 52, from Gladbach

Areas of application and wall types:

Brick walls:
Isofin® is suitable for traditional brick walls as it hydrophobizes the pore structure without impairing the breathability of the wall.

Quarry stone and natural stone masonry:
Ideal for walls with wide joints, as Isofin® spreads well in the joint mortar and is also effective in thick, double-shell natural stone walls.

Clay building materials:
Also works with clay walls, especially if they are not treated with modern binding agents. It protects clay building materials from moisture and prevents the transport of salts.

Concrete walls:
Isofin® is suitable for porous and damaged concrete. It can be used in brick rubble concrete, tamped concrete and standard concrete when these are affected by moisture.

Hollow bricks and perforated bricks:
Thanks to the good distribution and creeping properties of Isofin, hollow bricks and perforated bricks can also be treated efficiently.

Vaulted brickwork:
It can be used in vaulted cellars, although special techniques are recommended for use with difficult geometries and problematic ash fillings.

Multi-shell masonry:
Isofin® is suitable for double-shell walls with air gaps and can be injected from both the inside and the outside.

Dry masonry:
Particularly suitable for historic buildings without mortar in the joints.
If you need more specific details or examples of how to use Isofin on a particular type of wall, please let me know.

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Operating as a company since 1986

We (Freimuth Bautenschutz GmbH) focus primarily on relevant problems in the field of building protection. In this area, we are both a contractor in Germany and a producer of certified systems and materials for the moisture remediation of buildings.

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20 years guaranteed effect

Rely on the quality and reliability of Isofin with our 20-year guarantee. As a manufacturer, we fully stand behind the durability and effectiveness of our hydrophobic solution. With Isofin®, you not only choose effective protection against capillary moisture, but also the security of a long-term investment in the health of your home.

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Proven effectiveness

With Isofin® you are opting for tested quality. Isofin® has been put through its paces in a long-term study by the independent Materials Testing Office (MPA) in Dortmund and has impressively proven its effectiveness. Trust in a solution that delivers sustainable results and has been confirmed by experts. Protect your home with Isofin® - for a dry, healthy property that retains its value.

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FAQ's - Frequently asked questions

1 What is Isofin® and how does it work?

Isofin is a polymer-based hydrophobic injection barrier that permanently stops moisture in walls. It penetrates deep into the masonry and forms an invisible barrier that prevents moisture from rising or penetrating.

2. can I apply Isofin® myself or do I need a professional?

Isofin has been specially developed for DIY enthusiasts. All you need is a drill and the Isofin bottles, which are already prepared. Detailed instructions are included - no professional required!

3. which wall types is Isofin® suitable for?

Isofin works with:
 

- Brick masonry
- Quarry stone walls
- Concrete walls
- Clay walls
- Hollow blocks
- Half-timbered houses
- Internal and external walls

If you are unsure what type of masonry you have, we will be happy to help you.

4. how long does it take for the walls to dry?

After application, the masonry needs a few weeks to dry out completely. The exact time depends on the moisture content and the wall thickness. The dryness improves continuously and renovation work can start after a few weeks.

5 How long does the Isofin® barrier last?

Once applied, Isofin protects your walls for up to 20 years - with a quality guarantee. The product is designed to work reliably even under difficult conditions.

6 Is Isofin® safe for my home and the environment?

Yes, Isofin is safe. It contains no harmful chemicals and is harmless to both health and the environment. In addition, the fabric of your home remains completely intact.

7 How much does it cost to use Isofin®?

The cost depends on the size of the wall, but Isofin is one of the most cost-effective solutions for stopping damp in the long term. Compared to costly groundworks, you save thousands of euros.

8. does Isofin® also work with mold infestation?

Isofin stops the cause of mold - moisture. Once the walls are dry, existing mold can be removed and the formation of new mold is prevented.

9. do I need to consider anything before using Isofin®?

Yes, make sure the wall is free of heavy dirt or loose plaster. We also recommend that you familiarize yourself with the enclosed instructions to achieve the best results.

10. can I use Isofin® for basements or interior walls?

Yes, Isofin is suitable for both interior and exterior walls. It is ideal for basement walls affected by rising damp.

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Further customer opinions:

After spending a lot of money on tradesmen during a previous renovation, I wanted to do it myself this time. Isofin impressed me - for a fraction of the cost, I was able to create a high-quality capillary barrier that works even better than the previous solution. I finally have the feeling that I've put my money to good use.

- Markus F., 41, from Düsseldorf

I wanted to ensure that our house would remain free of moisture in the future. With Isofin, I have found a professional solution that is both effective and easy to use. After using it for the first time two years ago, I have now treated more interior walls to really be on the safe side. The quality speaks for itself.

- Marcel R., 46, from Bielefeld

We had a quote of over €43,000 for uncovering and sealing our exterior walls - that was simply far too expensive. With Isofin, we found a professional solution for a fraction of the cost. Our walls are now dry and I'm glad we chose Isofin.

- Andreas L., 52, from Gladbach

"I used Isofin because the damp in our walls was making the indoor climate really unpleasant. Now everything feels much better and we can breathe easy again. Simply great!"

- Frank S., 41, from Kassel

I discovered Isofin online and suggested that my husband try it out. He was skeptical at first, but when we worked on it together, he was totally enthusiastic. Now the walls are dry and he's really proud of the result - and I think he appreciates my ideas a bit more now.


- Sandra W., 38, from Bremen

I tried Isofin because I wanted to save on expensive tradesmen - and it was the best decision! It was very easy to apply and our cellar walls are finally dry. My neighbor has the same problem and now wants to try it too.

- Frank L., from Dortmund

After seeing the first signs of damp in our basement, I wanted to tackle the problem head on. Isofin was the perfect choice. It was easy to apply and now I am reassured that no major damage can occur. The best thing is that I treated the inside walls at the same time - for complete protection.

- Sven M., 37, from Stuttgart

I have been a DIY enthusiast for over 40 years and was really impressed with Isofin. The instructions were easy to understand and the product works perfectly. Our walls are dry, and best of all, I didn't have to have any exterior walls exposed. Our eldest has already ordered it and is just as enthusiastic as I am!

- Karl S., 67, from Munich

I used Isofin® for damp basement walls. My German is not so good, but the instructions were simple and everything worked well. Now the wall is dry, mold is gone, and I'm very satisfied. Isofin is really professional and easy for do-it-yourselfers like me.

- Igor K., 43, from Espelkamp


 

Damp walls and mold have annoyed us for years. With Isofin, I took the problem into my own hands and fixed it for a fraction of the cost. The best thing is that it looks like a professional did the work.

- Thomas R., from Hamburg

I was skeptical whether I could do it myself, but Isofin convinced me. With the clear instructions, I was able to renovate our damp basement walls myself. Now everything is dry - and at a fraction of the usual cost.

- Simone Hellhaus, from Gehlenbeck

Needs calculator

Avoid excess and deficiency: 

Calculate precisely how much Isofin® you need now!

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