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T1T2® Comparison Chart
| Krystol T1/T2 System | Other surface applied Products | Membranes | Densifying Admixtures | |
| Description of System | Cementitous material applied to concrete to transfer billions of needle-like growth crystals to infiltrate the concrete mass. | Materials applied to concrete surfaces containing mainly water repellents and sealants. | Liquid and sheet applied bitumens and polymers affixed to the concrete surface. | Mineral and chemical materials (pozzolans and silicates) that fill pores in concrete and reduce permeability when added to fresh concrete. |
| Resistance to hydrostatic water pressure | . Improves with time . exceeding 150 feet of head pressure in Port Authority Test . Only system to withstand 3MPa (435 psi) in water permeability testing |
. Limited penetration results in poor resistance to hydrostatic pressure . Resistance deteriorates from day one until failure |
. Protection breached by any pinhole or seam . Details, joints and workmanship must be in pristine condition . No resistance from the negative side |
. Reduces initial absorption but will succumb to pressure of water and contaminants in time . Will not resist penetration at cracks and voids |
| Protection of reinforcing steel | . Prevents corrosion of reinforcing steel by stopping passage of water and chlorides | . No protection from the
negative side . Limited protection from positive side as it slows the water ingress in uncracked locations |
. No protection from the negative side . Used in conjunction with other materials . Details, joints and workmanship must be in pristine condition |
. Limited protection as it slows the water ingress but does not stop it . No protection at cracked locations |
| Self-healing ability | . Will re-activate in the presence of moisture to seal new cracks even years later | . No self-healing ability | . No self-healing ability | . No self-healing ability |
| Repair requirements | . Does not need repairs as the performance is not contingent on durability as a surface coating | . Repairs may require removal of previous materials since treatment is reliant on surface materials | . Difficult to repair . Difficult to locate pinholes or poor joints . May require total removal and repair . Expensive and sometimes impossible due to accessibility |
. Limited repair options are available . Injection most popular |
| Application | . Applied by brush or spray to positive or negative sides of old or new concrete | . Brush or spray applied to positive side only . Substrate profile critical to performance |
. Correct jointing and seaming critical to performance . Typically positive side only |
. Mixed at batch plant or on-site |
| Construction schedule | . Can be applied during concrete finishing or anytime following | . Some require 28 day cured concrete . Similar scheduling as membranes |
. Must be applied at completion of structural work, prior to back fill | . Part of two step system . Requires crack detailing later |
| Effective land usage | . Can be applied to the negative side of concrete allowing construction tight to property lines | . Space required between property line and concrete for surface application | . Space required between property line and concrete for membrane installation | . Can build tight to property lines |
| Sub-surface drainage system | . No drainage required | . Requires drainage under heavy hydro- static pressures | . Requires drainage under heavy hydro- static pressures | . Requires drainage under heavy hydro- static pressures |
| Additional coatings | . Can be finished with coatings, tile, stucco, etc. | . May require special preparation or removal prior to surface finishes | . Poor adhesion for surface finishes | . Cracks may effect surface finishes |
| Maintenance | . Performance not based on durability as a surface coating; hence, maintenance not required | . Re-application required in hydrostatic conditions | . Costly replacement generally required | . Continuous maintenance required at cracked locations |
| Service life | . Permanent and improves over time | . Best when first applied . Deteriorates with time . Vulnerable to surface damage |
. Becomes brittle with age resulting in cracks and openings
. Surface damage will eliminate protection |
. Eventually cracks will deteriorate protection |
| Performance Guarantee | . 10 Year manufacturer material warranty | . Usually no performance guarantee | . Limited 5 and 10 year . Conditional on installation by trained applicators |
. None |
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