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    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

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    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

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

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    Repair of broken concrete slab floors

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    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.

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    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
Nut for Static Mixer 9 Pitch Dual Cartridges
Nut for attaching static mixers to all epoxy or polyurethane foams in dual tube sets.
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$0.75 USD

Static Mixer Selector for dual cartridge tubes
Static Mixer Nozzles Selector for all of our products. Polyurethane Foam or Epoxy injection products including concrete floor repair chemicals to cartridge systems.
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$2.40 USD

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Crossover Flow Restrictors for Dual Component Dispensing
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Crossover Flow Restrictors for Dual Component Dispensing
Item Name:

Crossover Flow Restrictors for Dual Component Dispensing

Item #:NX2824
$1.00 USD
NextStar-technologies-concrete-foundation-crack-injection-repairItem OptionsPolyurethane-crack-injection-kits
White for Polyurethanes 102,105,2N1 & 8590
Black-for E555, Roadware,
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Cross-over/back-flow restrictor

Prevent Cartrige Contamination 

Eliminates contamination, metering, and re-usage problems associated with dual cartridge dispensing when using dual cartridges without a tongue to separate the two streams as they come out of the cartridges. Without the tongue, material from one cartridge can easily flow into the adjacent cartridge tube rather than fully progress through the static mixers.

This is referred to as cross-over and commonly occurs at the beginning of dispensing and can continue until the pressures are equalized on both cartridges. A barrier or “tongue” is common in automated dispensing equipment but not in dual cartridges.

The cross-over/back-flow restrictor

Can be placed over the “D shaped openings in the neck of dual cartridges to introduce a “tongue” to the system. In addition, the restrictor introduces one-way flaps over these cartridge openings. These flaps open when pressure is exerted on the cartridges but resist material from flowing back into the cartridges (either from the adjacent cartridge or the static mixers). This is known as back-flow.

Both cross-over and back-flow contaminate the materials in the cartridges and can lead to improper rationing and premature curing in the cartridges. The latter, in turn, leads to incomplete and possible improper use of products. This also prevents re-using a partially used cartridge set.

The cross-over/back-flow restrictor is an effective and economical adaptor optimizing the usage and performance of dual cartridges and dual cartridges dispensing for foundation crack repair.

Product Uses:

These flow restrictors generally are only used when a whole dual-tube of product is anticipated not to be completely used up and the user is planning another use at a later time.
Compatible with
Allowable use with low viscosity epoxy and polyurethanesAny Low Viscosity Product (Very Thin)
Allowable use with medium viscosity epoxy and polyurethanes align=Medium Viscosity products

Not Compatible with
Epoxy pastes such as 901,902,302,E101 Flow resistance is too high.

The cross-over back-flow restrictor eliminates cartridge cross contamination between side of a dual cartridge system. This allows unused product to be used later without contamination.
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