Polyurethane mounting foam, due to its noise -insulating and heat -insulating qualities, is very popular. To avoid the risk of spending money and efforts in empty and not getting the desired result, we will try to figure out how to choose a quality product and use foam correctly.
1. First of all, you need to decide in what conditions the foam will be used.
The foam is divided into winter (-10 s), summer from (+5 s) and all-season. There is also a “professional” and “household” foam.
Professional, for large volumes of work and repeated use using a special gun, which regulates the release of foam. The weight of such a cylinder (950-1050 grams) of foam (60-65 liters).
Household, disposable cylinder with a soft tube, the weight of the cylinder (830-930 grams) is a foam exit 30-40 liters.
2. There should be a marking with foam: the manufacturer, production date and shelf life are indicated. If it is absent, then you should think about whether it makes sense to buy such a product. Indeed, when the marriage is detected, while using the cylinder, you just have no one to make a claim.
3. An important parameter, the time of polymerization of foam, it should not be too small or very long. The best 10-20 minutes. Before buying foam, check. If this indicator does not correspond to this range, then the quality of the work may significantly decrease.
4. Before work, the cylinder must be thoroughly shaken for 40-60 seconds. The place of application thoroughly sequent and disclose. Polyurethane foam begins to grasp from air humidity. Therefore, it will be useful to moisten with water the area to which you are going to apply foam.
5. Remember that the foam after exit increases in volume, so fill the seam by about 2/3 of its size. Too much foam can ruin everything. After drying, the excess foam should be cut with a knife.
6. Dried foam is afraid of ultraviolet rays. Under their influence, the foam begins to darken and collapse. Therefore, after drying it, it must be plastered or putty.
7. Before starting work, be sure to read the instructions.
