• NextStar Technologies Logo, concrete cracks foundation restoration injection and repair Concrete floor repair products.

    Welcome to NextStar Technologies


    NextStar is your specialist in concrete crack repair for foundation and slab floor restoration. Polyurethane foam, Epoxy, Polyurea, Special Urethanes & Carbon Fiber for concrete. National # 1-866-445-3984

  • Picture showing concrete crack repair injection products with polyurethane and epoxy injection kits and supplies

    Online Store

    Quality Supply

    Concrete crack repair products are used by contractors and professionals for foundation crack and slab repair.  Also offering a select line of D-I-Y products to the public. Enter Here

  • Basement and foundation crack repair for leaking basement foundations

    Foundation Crack Repair Kits

    Concrete Cracks

    Premium Polyurethane foam or Epoxy injection for basement concrete foundation cracks, to stop leaking foundations or repair of structural foundation walls using Epoxy.

  • Picture of concrete floor crack repair using cartridge system

    Repair of broken concrete slab floors

    Slab Floors

    Preferred solutions that can effectively repair common problems with broken or cracked concrete floor slabs. Solutions for structural repair of concrete slabs including carbon fiber solutions for reinforcement.

  •  Concrete foundation reinforcement with carbon fiber stronger than steel

    Concrete Reinforcement

    Carbon Fiber

    Carbon Fiber solutions for cracked or bowed concrete structurally reinforced with carbon fiber, stronger than steel but at a reduced cost. Carbon fiber provides a modern proven solution to an old problem and is easy to apply.

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NextStar-technologies-concrete-foundation-crack-injection-repairCategory ListPolyurethane-crack-injection-kits
NextStar-technologies-concrete-foundation-crack-injection-repairRelated ItemsPolyurethane-crack-injection-kits
Koster 2n1 Polyurethane Individual Tubeset Dual 600ml
Koster 2In1 resin polyurethane for low-pressure injection that will either react when contact with water or cure as an elastic resin without contact with water. Great for leaking foundation crack injections that have been repaired previously.
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$42.00 USD

Koster 2n1 Polyurethane 4.8 Gallon Kit
4.8 Gallon Kit KOSTER 2 IN 1 High-pressure polyurethane 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.
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$780.00 USD

NextStar-technologies-concrete-foundation-crack-injection-repairRegistered UsersPolyurethane-crack-injection-kits
Koster 2n1 Polyurethane One Gal Kit
NextStar-technologies-concrete-foundation-crack-injection-repairItem DetailsPolyurethane-crack-injection-kits
Koster 2n1 Polyurethane One Gal Kit
Item Name:

Koster 2n1 Polyurethane One Gal Kit

Item #:NX2155
$195.00 USD
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  • 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 an 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 the 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.

High pressure crack injection systems with polyurethane

Technical Data Sheet Koster 2 N 1 Polurethane technical data sheet

Special Applications

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.
Koster America
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.
Koster Canada
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 though 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.

Typical Uses

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.

For Cracks that are dry and are between 1/64th inch to 1/16 inch wide, the standard cartridge low-pressure method is used.

A Previous polyurethane or epoxy injection that has failed. Either injection method could be used.

Hydraulic cement Xypex 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.

1 Gallon Kit 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.
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