ResinTech CRU Chemical-Resistant Urethane Topcoat
Technical Documentation
Always confirm values against the current TDS and SDS before specifying or ordering.
ResinTech CRU is a premium aliphatic polyurethane finish coat used as the final protective layer over compatible epoxy, polyaspartic, broadcast, and traffic coating assemblies. It is intended for projects that need more than a standard topcoat: better long-term wear resistance, stronger chemical protection, excellent UV stability, and a hard, cleanable finish.
CRU is the thin durability layer of the ResinTech line—the final armour coat, not the build coat, membrane, or fast-track coat. Confirm chemical exposure, surface preparation, system compatibility, and cure schedule against the current ResinTech TDS, SDS, and project specification before use.
A ResinTech alternative to Tremco Vulkem 950NF and 951NF
ResinTech CRU is stocked in North Vancouver and used in the same two-component polyurethane topcoat and chemical-resistant wearing-course applications. Product chemistry and complete system builds differ between manufacturers, so confirm suitability against the current ResinTech TDS before substituting.
Vulkem is a registered trademark of Tremco. It is used here for identification and comparison only; no affiliation or endorsement is implied.
Two critical application rules
- Thin film only. Apply at 3–6 mils as recommended, and never exceed 20 mils total. CRU is a thin finish coat and can fail in cure, appearance, and adhesion above this thickness.
- Not recoatable once cured. CRU is the final coat. If any material must go over cured CRU, mechanically abrade or sand the surface first to create a physical bond. Cured CRU will not chemically recoat.
Product overview
| Field | Details |
|---|---|
| Brand | ResinTech |
| Product code | CRU |
| Product type | Two-component, high-solids aliphatic polyurethane finish coat |
| Kit / pack size | 6 L kit — Part A 4 L + Part B 2 L (1.6 US gal mixed), pre-proportioned 2:1 by volume |
| Mix ratio | Pre-proportioned Part A + Part B kit as supplied; do not alter the ratio |
| Colour / finish | Clear or field-pigmented; smooth, or slip-resistant when broadcast media is specified |
| System role | Premium protective finish—the final armour topcoat in ResinTech systems |
Where CRU sits in the system
CRU is the final armour coat of the ResinTech system: prime and bond with CBE, build with TUE, fast-finish with HPP, and protect the assembly with CRU—the strongest and most chemical-, abrasion-, and UV-resistant topcoat in the line.
Apply CRU in a thin 3–6 mil film over compatible cured coatings. It is the final, non-recoatable layer. Confirm the complete system specification against current ResinTech documentation.
Best-use applications
Confirm every application against the current ResinTech CRU Technical Data Sheet before specifying.
- Premium topcoat for parking decks, ramps, drive lanes, turning zones, and service areas
- Final protective coat over sand, quartz, flake, and reinforced traffic coating systems
- Commercial, institutional, warehouse, mechanical-room, automotive, and light-industrial floors
- Exterior or interior floors where UV stability, abrasion resistance, and cleanability matter
- Balconies, podium decks, walkways, corridors, and amenity areas over compatible base systems
- Food and beverage, service, utility, and maintenance spaces exposed to routine cleaning chemicals
- Protective clear or pigmented upgrade over HPP, TUE, CBE, or other compatible cured coatings
- Parkade and strata restoration projects where long-term durability is valued over the fastest cure
Product data
Source: ResinTech CRU Technical Data Sheet (TDS-CRU-1.0). Values are typical at 23 °C and 50% relative humidity unless noted. Confirm all values against the current TDS before specifying or ordering.
| Property | Typical value | Note |
|---|---|---|
| Components | Two—Part A resin + Part B hardener | Pre-proportioned kit as supplied |
| Mixing | Full kit or accurately measured proportions only | Low-speed mechanical mix for 2–3 minutes |
| Solids content | 92% by weight | ASTM D1353 |
| Chemistry | High-solids aliphatic polyurethane | Premium UV-stable protective-finish chemistry |
| Appearance | Clear or pigmented | Use compatible pigment or colorant where specified |
| Odour | Low to moderate | Ventilation is required during application and cure |
| Shelf life | 12 months | Unopened and stored properly at 10–30 °C |
Performance properties
These are typical values from the ResinTech CRU TDS. Actual results depend on the substrate, base coat, preparation, mixing, film build, and application conditions. Confirm all values against the current TDS.
| Property | Typical value | Test method / note |
|---|---|---|
| Bond strength to concrete | 280 psi | ASTM D4541; the substrate and base coat control final adhesion |
| Tensile strength | 5,800 psi | ASTM D412 |
| Elongation | 4% | Hard protective film; not a flexible membrane |
| Abrasion resistance | 20 mg loss—best in the line | ASTM D4060, CS-17 wheel, 1,000 g, 1,000 cycles |
| Shore hardness | 75 D | ASTM D2240 |
| Tack-free time | 8 hours | ASTM D1640 typical |
| Drying time | 18 hours at 5 mils | ASTM D1640, 24 °C / 50% relative humidity |
| UV stability | Superb | Suitable as an exposed interior or exterior protective topcoat |
| Chemical resistance | Superb | Premium chemical-resistant finish coat in the ResinTech line |
| Return-to-service speed | Standard | Prioritizes long-term protection over fast cure |
Working time, recoat, and cure
CRU is a premium protection coat, not the fastest-return material. Use HPP when speed is the priority and CRU when durability is the priority. Confirm all times against the current TDS.
| Condition | Typical value | Practical note |
|---|---|---|
| Recoat / overcoat window | 4–6 hours, wet only | Apply a second pass within this window. Once cured, abrade mechanically first. |
| Light foot traffic | About 24 hours | Protect from water, dust, and early abuse |
| Vehicle traffic | About 72 hours | Allow longer in cool, damp, or low-airflow conditions |
| Full cure | About 7 days | Delay aggressive cleaning and chemical exposure until full cure |
| Rain / moisture protection | Protect during early cure | Exterior work must be staged around weather and dew point |
Coverage and film build
Coverage is theoretical per US gallon; the 6 L kit is approximately 1.6 US gal. The recommended film is 3–6 mils, and the total film must never exceed 20 mils. Confirm coverage and film build against the current TDS.
| Use mode | Typical film build | Typical coverage |
|---|---|---|
| Premium upgrade topcoat | 4–6 mils | 665–440 ft²/US gal |
| Maximum-protection topcoat | 5–10 mils | 530–265 ft²/US gal |
| Clear decorative finish | 4–6 mils | Depends on the flake or quartz profile and desired texture or gloss |
| Slip-resistant protective coat | 5–10 mils | Broadcast media, profile, and backroll pressure control final texture |
| EWS-X protective coat | 5–10 mils | Use with light aluminum oxide or specified media where extra grip or wear resistance is required |
Application conditions
Confirm every condition against the current ResinTech TDS and project specification before use.
| Condition | Requirement |
|---|---|
| Substrate temperature | 10–30 °C |
| Ambient temperature | 10–32 °C |
| Relative humidity | Maximum 85% recommended |
| Dew point | Substrate at least 3 °C above dew point |
| Substrate moisture | Dry concrete or a compatible cured coating system; verify before coating |
| Concrete age | Normally 28 days unless the designer approves earlier work |
| Minimum concrete strength | 3,600 psi compressive and 220 psi tensile pull-off |
Application notes
Always confirm application requirements against the current TDS, SDS, and project specification before use.
Surface preparation
Apply CRU only to clean, dry, sound substrates or compatible cured coatings. Remove dust, laitance, oil, grease, curing compounds, sealers, loose broadcast, and other bond breakers. Existing coatings must be sound, compatible, and properly abraded; do not apply over glossy, soft, unknown, or poorly bonded coatings.
Mechanically prepare concrete to the profile required by the base system. When recoating cured resin, abrade uniformly to remove the gloss. Vacuum thoroughly before coating. Moving joints must remain functional and be sealed separately with an appropriate joint sealant. Confirm all preparation requirements against the current TDS.
Mixing
Condition the material to the application temperature before use. Pre-mix each component separately, adding compatible pigment to Part A where a pigmented finish is required. Combine the supplied Part A and Part B in the correct pre-proportioned ratio and mix mechanically for 2–3 minutes at low speed until uniform.
Scrape the sides and bottom of the pail and avoid whipping air into the coating. Do not thin with solvents. Apply promptly after mixing and maintain a wet edge. Confirm all mixing requirements against the current TDS.
Application and overcoating
Apply with a high-quality roller, squeegee and backroll, brush for details, or spray where appropriate. Maintain an even film. Apply at the recommended 3–6 mils and do not exceed 20 mils total; excessive thickness can cause cure failure, blush, and adhesion loss.
CRU is not recoatable after cure. Sand or abrade the cured surface uniformly to create a mechanical bond before applying any subsequent material. For slip resistance, use specified silica sand, quartz, aluminum oxide, or approved traction media.
Apply clear coats thinly and uniformly over decorative systems, avoiding puddles that can alter gloss or cure. For pigmented coats, use consistent batching, backroll direction, and film thickness. Mock-ups are recommended for appearance-critical work. Protect fresh coating from rain, condensation, dust, foot traffic, tires, and turning stress until sufficiently cured.
Limitations
- Do not exceed 20 mils total film thickness. CRU is a thin finish coat, with 3–6 mils recommended, and can fail in cure, appearance, and adhesion above this limit.
- CRU is not recoatable once cured. Any subsequent coat or repair requires mechanical abrasion or sanding of the cured surface to create a physical bond.
- CRU is a finish coat, not a primer, build coat, or crack-bridging membrane.
- Do not apply to wet, frozen, dusty, contaminated, or condensing substrates.
- Do not apply over unknown or incompatible coatings without adhesion testing and approval.
- Slip resistance depends on aggregate type, broadcast rate, film thickness, and maintenance. Approve the texture through a mock-up.
- Chemical resistance varies with concentration, temperature, exposure time, and housekeeping. Test severe exposures before use.
Technical documentation
Use the Technical Data Sheet and Safety Data Sheet buttons near the top of this page to open the current ResinTech CRU PDF documents. Confirm every value against the current TDS and SDS before specifying or ordering.
Trade purchasing note
All sales are intended for professional and trade purchasers. Before ordering, confirm product suitability, quantity, colour, system compatibility, substrate condition, pickup timing, and delivery requirements. Product use and installation are the responsibility of the purchaser and installer.
Technical information is provided for professional reference only. Product selection, substrate preparation, installation method, coverage, cure time, system compatibility, and final performance remain the responsibility of the purchaser, installer, project specifier, and/or manufacturer documentation. Always confirm suitability against the current TDS, SDS, project specification, and site conditions before use.
Order enquiries and volume orders
ResinTech does not sell this product directly through this website. Current pricing, stock, volume orders, system compatibility questions, pickup timing, and delivery across BC are handled by Canopus Supply.
- Call: 1 (250) 233-3000
- Email: order@canopussupply.com
- Pickup: Unit 103, 185 Forester Street, North Vancouver, BC
Canopus Supply Inc. is an authorized ResinTech distributor serving Metro Vancouver and British Columbia.