Koster 2 IN 1 Polyurethane Resin 1 gal / 3.78L
Use with Single or Dual High-Pressure polyurethane pumps
Fast reaction time
2 resins in one
Can also be used with low-pressure systems
KOSTER 2 IN 1 acts like a single component injection resin if it comes into contact with water. In this case, it reacts to form a highly elastic foam. KOSTER 2 IN 1 acts like a injection resin under dry conditions. KOSTER 2 IN 1 remains elastic after reacting. It is able to follow crack movements and seal cracks permanently with an elastic polyurethane solid resin without the need for follow-up injections. KOSTER 2 IN 1 is a fast reacting foam for the short term closure of leaks as well as an elastic solid resin for permanent closure of cracks. KOSTER 2 IN 1therefore combines two resins into one product. KOSTER 2 IN 1 is solvent free and is resistant to hydrolysis.
KOSTER KB-Pur 2 IN 1 is the standard material for waterproofing cracks. The material forms a foam when it comes in contact with water and stops it by reacting with the water or displacing it. A second injection using the same material permanently and elastically waterproofs the crack.
Technical Data Sheet
Koster 2 IN 1 Is a specialty polyurethane foam used for leaking cracked foundations or basements, It can be used as a general range of polyurethane used for foundations and leaks. 2IN1 resin, however, has some unique characteristics making it a good choice for small leaking cracks or the first choice solution for previously repaired walls. The expansion rate is faster than most products but its ability to penetrate small cracks as with expansion comes increased internal wall pressure pushing Koster into the smallest cracks.
Since no water or moisture is required it can be used in almost all applications. Should the injected concrete crack be dry it will not foam and cure as a stiff semi-hard resin, this is why it is called a two in one resin. Injecting in a dry crack will take as much product as similar viscosity epoxies. To get the benefit of both features usually, the injections are required once to use up any moisture or water with foaming action then shortly after reinjecting the area in the same order to fill the cracked area with more product.
The cure time can be much longer than standard polyurethanes if no moisture is present and the applicator should wait at least 4 days to allow the resin to cure to the semi-hard status before removing injection ports. Even thou this is a specialty Polyurethane foam it is however very easy to use with a high success rate even with novice applicators.
Previously Repaired Wall Cracks
Koster 2IN1 is the best suited for these types of repairs as in our experience has shown if it is not a structural crack.
Leaking wall cracks that have been repaired with hydraulic cement or any unknown material.
Wall cracks that it is impossible to determine where the cracks are and High-Pressure method will need to be used as the cracks may be far less than 1/64th of an inch wide. This requires high-pressure injection packers installed into the concrete at an angle in the hope to intersect the cracks and with pressure will be forced through the repair area to the exterior wall. High pressure can be accomplished via a modified grease gun or for contractors a single-component injection pump.
Cracks that are dry and are between 1/64th inch to 1/16 inch wide, standard cartridge low-pressure method is used.
A Previous polyurethane or epoxy injection that has failed. Either injection method could be used.
Hydraulic cement or any other cement product repair that has re-cracked and the crack is easily identifiable the standard low-pressure method with cartridges can be used.