We emphasize right away that the caulk, which we talked about in detail, is still the main way to seal the seams between the logs. The sealant is used as an additional layer that is more reliable, increases the life of the structure and provides heat to the building. While some experts believe that caulk can replace caulk completely, most are convinced otherwise. Many manufacturers offer immediate purchase of seals, for example, extruded polyethylene, and a sealant as a top layer.
The technology of using sealants in log cabins is usually called “warm seam”, because it really turns out to be warmer than usual. The following types of sealants can be distinguished:
- Silicone. They are universal, adhere well to wood, are completely waterproof, elastic, that is, they can be used on twisted elements, they are not afraid of temperature extremes. However, silicone sealants are difficult to remove, if necessary, black mold may appear on the surface, which will be very difficult to get rid of. In addition, silicone sealants have an unpleasant odor..
- Acrylic. Unlike silicone, they are distinguished by an attractive appearance, all other advantages remain. The disadvantages of acrylic sealants include the risk of cracking at low temperatures, so they are not used for external work. To work on the facade of a log house, acrylic-based sealants can be used, but with special additives.
- Bituminous. They are not afraid of rodents and mold, as well as direct contact with water. But bituminous sealants cannot be called safe for humans, they can release chemicals. In addition, they have an unattractive appearance, and this type of sealant is not suitable for cylindering..
- Polyurethane. It is their experts who call them the best option, because they have all the advantages of previous sealants, moreover, strengthened by working on the ideal formula. Minus – environmental friendliness is in question.
As for specific brands, we were able to find positive responses about German sealant Remmers, American Perma-Chink and Russian “Oliva” and “Neomid”. The American one is the most expensive – about 1,300 rubles, but the Russian counterparts can be found at a price of 130 rubles per kilogram. It is important not to buy a fake..
It is possible to choose a ready-made sealant of various shades in order to match it as much as possible to the color of the log house.
Some users advise not to waste money and replace the sealant with sawdust mixed with PVA glue or epoxy glue. In this case, chips of a suitable size can be hammered into the gap..
The process of applying the sealant is simple, but quite time consuming. First, you need to prepare the surface of the tree, clean it, insert a sealing cord into the seam, and then apply the sealant with a layer of 4 to 10 millimeters. We highly recommend using masking tape so that you don’t have to clean the logs of sealant. You can smooth the seam either with a soft spatula, or simply with your fingers – as it is more convenient. Remember to apply sealant you will need a squeeze gun, regular or manufacturer-specified.
Experts note that all the properties and strength of the sealant can only be determined after some time. The log house must stand at least one winter in order to be able to understand whether the material was durable for sealing joints. Remember that sealing the joints, like the second caulking, is carried out only after the log shrinkage, that is, one to two years after the end of construction.