Frequently Asked Questions

Q: Ordering and payment, how do I place an order?

A: You can place your order safely, easily and quickly in our webshop. We would like to explain how it works.

You can order in 3 simple steps:

1. Post your item(s)

Did you find what you were looking for? Then press the 'order now' shopping cart to place the item in your digital shopping cart. You can now continue shopping or continue ordering.

You can adjust the quantity in your shopping cart if you want to order multiple pieces. Would you like to remove an item from your shopping cart? Then click on the 'remove' button below the product image.

2. Order with or without an account

You can order at with or without an account. Do you have an account? Then ordering will be much faster and you can easily place a repeat order and find invoices.

No account yet? You can also order without an account, but we still need some information. That's done in no time, just a matter of completing it. We recommend that you create an account because it has many advantages. Fortunately, that is very easy.

3. Complete order

Are you done shopping? Then click on checkout. Create an account or continue as a guest. Then fill in your details and select your payment method. Complete your payment and the order is completed.


NB! You can also pick up your order. Please contact us in advance.


Q: What are the shipping costs?

A. ships orders with MyParcel / Post NL and the shipping costs are 5.20 to 30 kilos. If you order more than €50, shipping is free.

Q: What kit colors are available and which should I choose?

A: Did you know that has a wide variety of colored silicone sealant? We have a kit available in various colors.

In addition to choosing the right type of sealant for your specific job, color choice is also an important part of the selection process. After all, you want the color of the kit to match the style of your interior.

Choosing the right color is not always an easy task. An additional problem is that colors on a screen are always indicative. They give a nice picture, but never exactly reflect reality. The color may therefore differ slightly from what you see on the screen.

To solve this problem, special color charts with real color samples have been designed. The color chart shows at a glance what the colors look like in real life and what options are available per kit type. This way you are always assured of the right color for your project.

Do you need help ordering a color card? Please feel free to contact us. We are happy to help you make the right color choice.

Q: How much kit do I need?

A: There are a few questions you need to ask yourself before you can calculate how much you need.

  • Sealing or gluing?

The amount of sealant needed to complete a job perfectly depends largely on the nature of the work. Because sealant remains quite elastic even after curing, but also has a lot of adhesive power, the material can often be used in two ways. Always ask yourself the following question: do you use the sealant to glue two parts or materials together or only to seal a joint or seam? In the first case, a thicker sealant layer is usually required to achieve the optimal result. Universal sealants are suitable for both purposes. In addition, there are also various types of sealants that are specially tailored to sealing or gluing surfaces.

  • Raw materials and properties

An important difference between the various types of sealant is the raw material that serves as the basis for the material. This sometimes also affects the amount of sealant you need to apply for optimal adhesion or sealing. Sealants such as butyl rubber and polyurethane sealants, for example, have a very long lifespan. As a result, you generally need relatively little of this material to apply a properly wear-resistant sealant layer. The so-called tensile strength of the sealant can also influence the amount of joint material you need. This value determines the maximum weight per square centimeter a kit can be loaded with. A measure that gives an indication of the strength of the sealant after it has fully hardened. This value is therefore also called the 'final strength'. As a rule, the stiffer a sealant is, the higher its final strength. Smaller quantities of a stiff and powerful sealant are therefore often required to seal a joint or to glue a specific surface.

  • Calculation model

There is a calculation model that, especially in the case of sealant, gives a good indication of the joint dimensions and associated quantities of sealant. As a rule of thumb, you can assume a sum that includes the following variables: length of joint to be sealed x height of joint x depth of joint = the required amount of sealant (ml). Suppose you need to seal a joint that is 5 meters long, 10 millimeters high and 5 millimeters deep. Then you arrive at 5 x 10 x 5 = 250 milliliters of kit. In that case, a 310 milliliter cooker kit or a 600 ml sausage is more than sufficient. You can find the calculation formula if you select a product to which the formula applies. Then click on: 'calculate how much you need'.

Q: What is the best way to remove sealant?

A: Although our quality sealant will certainly last a long time if applied properly, there inevitably comes a time when an old sealant layer begins to show defects and imperfections. The material can become brittle, especially in damp areas such as bathrooms, but can also eventually be affected by mold, for example. At such a time there is little option other than removing the old sealant.

Before you apply a new sealant layer, it is of course important to remove the old one as thoroughly and accurately as possible. This can be a tricky job. It is therefore important to make a step-by-step plan for removing old sealant and to stick to it. What is the best way to remove old sealant? And what are the most important points to keep in mind? We would like to tell you more about it.

  • Right tools

Of course, the first step in removing old caulk is getting the right tools. The most important tool is a sharp box cutter or special silicone blade. A grout scraper can also come in handy. View the different accessories available in our online store.

  • Remove silicone sealant with OTTO Silout

The OTTO Silout is a professional silicone remover. The paste is specially formulated for the removal of hardened silicone sealant and adhesives. The big advantage of the Silout is that silicone-free surfaces are created after application. The OTTO Silout also removes silicone sealant from wood, stone walls, plaster, concrete, glass, porcelain, metal and plastic. The Silout is often used in construction, but can also be used in your bathroom or kitchen, for example. Read the manual carefully to ensure that the surface is not affected.

  • Remove large sealant residues

With a knife you can cut the silicone substance down to the substrate and on either side of the joint. Precision and some restraint are required, because too much physical strength can easily lead to a damaged surface.

Another commonly used technique is to loosen a small piece of sealant. By carefully pulling off the rest, it is possible to remove a large piece of silicone sealant in one go. Because practice often makes perfect, it is wise to experiment before starting larger-scale work.

It is quite possible that after scraping off the sealant, there will still be some loose residue floating around. With our vladder (small brush), those loose sealant residues can usually be removed very easily.

Do you need advice on removing sealant or certain products required for this? Please feel free to contact us. We like to help you.

Q: How do you get the best results from our products?

  1. Remove the old sealant residue. Use our finishing tools or the Ottoseal SilOut for this. Also read our advice on effectively removing old sealant.
  2. Make the bonding surfaces thoroughly dry, clean and free of grease. For example, you can use the OTTO Cleaner for most non-porous surfaces.
  3. For some surfaces it is important that you treat them with a primer or cleaner. Read the technical specifications or contact us. We are happy to help and advise you.
  4. After priming you can apply the sealant. Would you like to know how many tubes of kit you need? Use our calculation tool on the product page to calculate exactly how much sealant you need.
  5. Use the correct finishing soap after applying the sealant.
  6. We have various high-quality finishing tools available in our shop for finishing the joint. For example the OTTO Fugenfux.

Tips for a neat finish

The sealant layer has been applied properly and satisfactorily. After this time-consuming job, it is time for the finishing touch , cutting and finishing the sealant surfaces. How do you optimally finish a sealant surface and which method generates the best results? Below are some tips for finishing.

  • Precision job

Beautifully cutting and finishing a sealant layer is a job that requires the necessary precision and an eye for detail. After all, it would be a waste of time and effort if you were left with a frayed or poorly finished sealant strip. It is therefore important to pay close attention to a few crucial points to achieve optimal results.

  • Smooth for a neat finish

After applying the sealant layer, it is important to smooth the layer. First spray the connections with some soapy water, we recommend the standard finishing soap from Otto or, if the kit has been applied to a natural stone surface, the Otto Marble finishing soap. You can then use a sealant plate or special finishing tool such as the Fugenboy or Fugenfux to remove the sealant layer. Wet the sealant plate in a bucket with sealant soap and place the scraper plate perpendicular to the tiles, against the sealant. Smooth away any excess sealant residue from bottom to top. It is advisable to always start from the bottom, otherwise the floor will become wet from the dripping water and the sealant layer will not adhere properly to the substrate. To be sure, you can always run your finger over the sealant again for the perfect end result.

  •  Use a spatula or finishing wood

A spatula is an excellent tool for neatly finishing a sealant layer. Spatulas are transparent pieces of plastic with rounded or beveled corners. The size of these handy tools depends on the job to be performed. Spatulas provide sufficient grip and are also somewhat flexible. Try to hold the spatula slightly at an angle on the joint and push the sealant in with light pressure in the direction of pull. Always keep the sharp side of the spatula in the direction of movement. By holding the spatula at an angle, you can bridge the intersections between joints without too many problems. Finishing wood is also an excellent tool for finishing sealant. They are available in different sizes, namely 6, 8, 10, 15, 20 and 25 millimeters.

  • Allow the sealant to harden thoroughly

Always allow the sealant to harden thoroughly before the material is loaded. This reduces the risk of cracks, tears or unsightly frayed edges. The curing time varies per type of sealant and is also partly dependent on factors such as (ambient) temperature, the moisture content in a room and, in the case of a sealant job outdoors, the weather conditions.


Other tips

  • Be careful with matte colors. These can only be smoothed once.
  • The matt effect may be lost if you apply it several times.
  • Please keep in mind that you always ensure sufficient ventilation during the kitten period.