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Carbothane 133 LV by Carboline

Carbothane 133 LV - Low VOC High Build Finish Topcoat

by Carboline
$525.48 - $1,868.39
$525.48
$525.48 - $1,868.39
$525.48

Carbothane 133 LV - Low VOC Satin Finish Topcoat is a high-solids, high-build aliphatic polyurethane finish coat engineered by Carboline for superior weathering resistance, color/gloss retention, and durable protection in industrial, atmospheric, and maintenance environments.

This low-VOC topcoat offers outstanding UV stability, quick dry-to-recoat and handle times, good abrasion and corrosion resistance, and a tough attractive satin finish—ideal for steel structures, tanks, piping, bridges, equipment, and infrastructure requiring long-term exterior durability with regulatory compliance.

Carbothane 133 LV PDS >
Finish: Satin to Semi-Gloss
Theoretical Coverage: approx. 200-400 SF/Gal depending on DFT (refer to PDS for exact rates)

VIEW THE ENTIRE LINE OF CARBOLINE COATINGS HERE>

Key Features:

  • Outstanding Weathering & UV Resistance: Aliphatic formulation delivers exceptional color and gloss retention, resisting chalking, fading, and degradation in exterior exposure.
  • High Solids, Low VOC & High Build: Enables thicker films in fewer coats for application efficiency; low VOC/HAPs compliant for regulated environments.
  • Quick Dry & Good Resistance Properties: Fast recoat/handle times reduce downtime; provides solid abrasion, corrosion, and chemical resistance in industrial settings; low-temp cure down to 35°F.

Common Industry Applications:

  • Industrial & Petrochemical: Topcoat for tanks, vessels, piping, and structures in refineries, plants, and facilities demanding weather-resistant finishes.
  • Infrastructure & Bridges: Exterior protection for steel bridges, highways, and treatment facilities in atmospheric exposure.
  • General Maintenance & Heavy-Duty Atmospheric: Steel equipment and surfaces in aggressive outdoor/industrial environments needing low-VOC, high-performance topcoats.

Carbothane 133 LV is a TWO-COMPONENT SYSTEM (PART A & PART B).

Product type: High-Solids Aliphatic Polyurethane Topcoat.
Finish: Satin to Semi
Applied via: Airless Spray, Conventional Spray, Brush, or Roller

Shipping & Delivery: Carboline orders typically ship within 1-2 business days following receipt of order.
Most Carboline orders are received within a week of placement. 
Expedited shipping is NOT available on most orders. 

Looking for a low-VOC satin polyurethane topcoat?
Contact our customer support today to discuss your project:
(800) 567-5358

Size: 1.2Gal
Color: Light Grey (C705)
Coverage Calculator

Compatible Thinners — 133 LV

Thinner Use Max Rate
Thinner 236E Spray (lowest VOC option) 16 oz/gal
Thinner 242E Spray (VOC-exempt t-butyl acetate) 16 oz/gal
Thinner 25 › Spray 7.3 oz/gal
Thinner 214 Spray 8 oz/gal
Thinner 215 Brush / Roller 8 oz/gal
Thinner 2 or Acetone Cleanup only —

For low-VOC compliance, Thinner 236E is the best choice — it does not raise the as-supplied VOC at the maximum thinning rate. Use of thinners other than those listed may void the product warranty.

Recommended Coating Systems

Industrial Maintenance System

Heavy-duty system for new construction or maintenance of structural steel — surface-tolerant epoxy intermediate with low-VOC polyurethane finish.

Intermediate Carboguard 890 4–6 mils DFT · cycloaliphatic amine epoxy · self-priming
→
Topcoat Carbothane 133 LV 3–5 mils DFT · low-VOC satin polyurethane
VOC-Restricted Maintenance System

For overcoating projects, marginally prepared steel (SSPC-SP2/SP3), and jurisdictions with the strictest VOC limits — system VOC is among the lowest available.

Primer Rustbond PS 1–3 mils DFT · <100 g/L VOC · surface-tolerant
→
Topcoat Carbothane 133 LV 3–5 mils DFT · 211 g/L VOC

Rustbond PS lists polyurethanes among approved topcoats (max recoat 30 days at 75°F). Carboguard 890 lists polyurethanes among approved topcoats (max recoat 90 days at 75°F). Sources: Rustbond PS PDS (Oct 2025, doc 1091); Carboguard 890 PDS (Nov 2024, doc 0986).

Frequently Purchased Together

Carboguard 890 cycloaliphatic amine epoxy intermediate
Carboguard 890
Cycloaliphatic amine epoxy intermediate — common pairing under Carbothane 133 LV on industrial steel.
From $419.48
Shop Now
Carboline Thinner No. 25 — urethane spray thinner
Carboline Thinner No. 25
Urethane spray thinner approved for Carbothane 133 LV (up to 7.3 oz/gal).
$137.53 / gal
Shop Now
Carboline Additive 101 — cold cure accelerator
Carboline Additive 101
Accelerates cure 25–40% and enables cold-weather application down to 20°F.
$107.25
Shop Now
Carbothane 134 HG high-gloss aliphatic polyurethane
Carbothane 134 HG
Family sibling — high-gloss finish with metallic colors. Choose when gloss appearance or AWWA/MIL specs are required.
From $292.27
Shop Now

Carbothane 133 LV Low-VOC Aliphatic Polyurethane Topcoat by Carboline

Product Specs — Carbothane 133 LV

Carbothane 133 LV — High-Solids Aliphatic Acrylic-Polyester Polyurethane Topcoat by Carboline.
The lowest-VOC and lowest-HAPs topcoat in the Carbothane 133/134 family. 211 g/L per EPA Method 24 as supplied. High-solids (72% by volume), high-build satin-to-semi-gloss finish with outstanding weathering properties and good resistance to abrasion and corrosion. Longest pot life in the family at 6 hours. Cures to 35°F surface temperature. Applies direct to zinc-rich primers with a mist coat. Indefinite recoat window.

✓ 211 g/L VOC (EPA Method 24)  •  ✓ Low HAPs  •  ✓ 5:1 Mix Ratio  •  ✓ 6-Hr Pot Life @ 75°F  •  ✓ Indefinite Recoat  •  ✓ Cures to 35°F

✏️ Need a project quote? Request Online

📞 Questions? Call (800) 567-5358 — Mon–Fri 8AM–5PM EST

Carbothane 133 LV by Carboline

Carbothane 133 LV low-VOC aliphatic polyurethane topcoat by Carboline — 1.2-gallon and 4.8-gallon kits
Carbothane 133 LV — Low-VOC Aliphatic Polyurethane Topcoat

Shipping Map — Carboline Delivery Timing

US regional warehouse map showing estimated shipping transit times for Carboline product orders from Material Warehouse 🔍 Click to enlarge
Typical transit times vary by destination zone. Click map to enlarge.

Shipping Time

Call (800) 567-5358 for pricing and logistics questions.

Carboline orders ship from regional warehouses nearest to your location, with full product stock maintained at each facility.

Most orders ship within 2–3 business days of order placement. Transit times shown on the map are typical but not guaranteed.

Available sizes: 1.2-gallon kit (17 lbs)  •  4.8-gallon kit (65 lbs)

Coverage Rates & Technical Specifications

Recommended DFT: 3–5 mils per coat. 72% volume solids. Do not exceed 7 mils DFT per coat. Allow for loss in mixing and application.

PropertyValueNotes
Generic TypeAliphatic Acrylic-Polyester Polyurethane—
FinishSatin to Semi-GlossAllows easier field touch-up
Standard ColorsSafety Yellow (6666), Safety Red (5555), Grey (C703), Light Grey (C705), Black (C900)Custom colors available on request
Volume Solids72% ±2%Highest in the Carbothane 133/134 family
Recommended DFT3–5 mils (76–127 µm) per coatMax 7 mils per coat not recommended
Coverage @ 1 mil1,155 ft²/gal (28.3 m²/l)Theoretical — allow for loss
Coverage @ 3 mils385 ft²/gal (9.4 m²/l)Theoretical — typical specification DFT
Coverage @ 5 mils231 ft²/gal (5.7 m²/l)Theoretical — maximum recommended DFT
VOC (As Supplied)211 g/l (1.76 lbs/gal) per EPA Method 24Lowest in the 133/134 family · see VOC table for thinned values
HAPs0.4–0.9 lbs/solid gallonLow HAPs — values vary slightly with color
Mix Ratio5:1 (Part A to Part B)Do not mix partial kits
Pot Life6 hours at 75°F (24°C)Longest in the 133/134 family · moisture causes gellation
Min Surface Temp35°F (2°C)Material min: 50°F (10°C)
Dry to Handle @ 75°F8 hoursBased on 4.0 mil DFT
Dry to Recoat @ 75°F8 hoursMaximum recoat time is indefinite
Max Humidity (Application)90% RHMoisture exposure causes gloss loss / microbubbling
Dry Temp. Resistance300°F (149°C) continuousSome discoloration/gloss loss at elevated temps
Direct-to-Zinc CapabilityYes — with proper mist coatOver Carbozinc, Carboguard, Carbomastic, or specified primers
Application MethodsConventional Spray, Airless Spray, Brush, RollerBrush for touch-up only; roller: 3/8" nap solvent-resistant roller
Spray ThinnersThinner 236E (up to 16 oz/gal), 242E (up to 16 oz/gal), 25 (up to 7.3 oz/gal), 214 (up to 8 oz/gal)236E and 242E maintain 211 g/L VOC when thinned
Brush/Roller ThinnerThinner 215 (up to 8 oz/gal)—
CleanupThinner 2 or Acetone—
Shelf Life — Part AMin. 36 months at 75°FUnopened, stored per conditions below
Shelf Life — Part BMin. 24 months at 75°FUrethane Converter 811
Storage Humidity0–80% RHStorage condition (not application max)
Storage Temp40–110°F (4–43°C) · IndoorsNot affected by excursions to 10°F for up to 14 days
Flash Point — Part A60°F (15°C)Setaflash
Flash Point — Part B127°F (53°C)Setaflash
Kit Sizes1.2-gal (17 lbs) · 4.8-gal (65 lbs)—

Source: Carboline Carbothane 133 LV Product Data Sheet (May 2025, doc 0195). Coverage rates are theoretical — actual yield varies with surface profile, temperature, and application method.

Curing Schedule

Times based on 4.0 mil (100 micron) DFT. Higher film thickness, insufficient ventilation, or lower temperatures extend cure times. Maximum recoat time is indefinite.

Surface Temp.Dry to HandleDry to RecoatFinal Cure
35°F (2°C)36 Hours36 Hours14 Days
50°F (10°C)16 Hours16 Hours10 Days
75°F (24°C)8 Hours8 Hours7 Days
90°F (32°C)4 Hours4 Hours5 Days

Additive 101: Add 1.0–2.0 oz per mixed gallon (max 6 oz per 5-gal kit) to accelerate cure 25–40% and extend cure to 20°F (–7°C). Reduces pot life approximately 40–50%. VOC impact: +0.08 lbs/gal (+10 g/l) at 1.5 oz/gal addition rate.

VOC Values by Thinner

Thinning ConditionVOC
As Supplied (no thinner)211 g/l (1.76 lbs/gal)
Thinner 236E @ 16 oz/gal211 g/l (1.76 lbs/gal) — maintained
Thinner 242E @ 16 oz/gal211 g/l (1.76 lbs/gal) — maintained
Thinner 214 @ 8 oz/gal246 g/l (2.06 lbs/gal)
Thinner 215 @ 8 oz/gal (brush/roller)249 g/l (2.07 lbs/gal)
Thinner 25 @ 7.3 oz/gal249 g/l (2.08 lbs/gal)
Additive 101 @ 1.5 oz/gal219 g/l (1.83 lbs/gal)

Nominal values — may vary slightly with color. Product contains VOC-exempt dimethyl carbonate. Thinner 242E contains VOC-exempt t-butyl acetate — check local regulations. Check local regulations regarding product usage before specifying.

Carbothane 133 Family — When to Choose Which

133 LV ★ This Product

Lowest VOC (211 g/L) and lowest HAPs in the family. Longest pot life (6 hours). Best for VOC-restricted jurisdictions, HAPs compliance, or applications where extra working time matters. Highest solids (72%) and best coverage rate.

133 LH

Lower-sheen satin finish meeting SSPC Paint 36 Level 3. Choose for bridge/highway and industrial maintenance specs requiring reduced glare. Better at hiding substrate imperfections than 133 LV.

133 HB

High-build satin finish. Most economical. Direct to inorganic zinc with mist coat. Backed by extensive ASTM test data (4,000-hr salt fog, 8,600-hr water fog). Best for general industrial steel and bridge applications.

134 HG

High-gloss finish. Only product in the family with metallic colors. Meets AWWA D102 OCS 5/6, MIL-PRF-85285E, UFGS 09 97 13.27, USDA-suitable. Thin-film 2–3 mils. Best for architectural and specification work.

Comparison sourced from Carboline TDS: 133 LV (May 2025, doc 0195), 133 LH (Jan 2026, doc 8837), 133 HB (June 2021, doc 0840), 134 HG (Oct 2024, doc 0859).

Good to Know Before You Buy

⚠️ Application Notes & Pro Tips
  1. Thinner 236E and 242E maintain the 211 g/L VOC when thinning for spray. These are the only thinners that preserve the as-supplied VOC level. Thinner 25, 214, and 215 all raise VOC above 211 g/L. If VOC compliance at 211 g/L is required, use only 236E or 242E for spray thinning.
  2. 5:1 mix ratio — verify before mixing. Each Carbothane product uses a different ratio: 133 LV is 5:1, 133 LH and 134 HG are 4:1, 133 HB is 6:1. Mixing the wrong ratio compromises cure and film performance. Do not mix partial kits.
  3. 6-hour pot life — the longest in the 133/134 family. Useful for large spray jobs or when working in extreme heat slows production. Pot life still shortens at higher ambient temperatures, and moisture contamination causes gellation regardless of remaining pot life.
  4. Indefinite recoat window. No maximum recoat time. Wipe surface with Thinner 25 before recoating — slight tack means it is ready to recoat without abrading.
  5. Cures to 35°F surface temp without Additive 101. One of the lowest minimum surface temperatures of any polyurethane topcoat. With Additive 101, cure extends to 20°F, but pot life drops 40–50% — plan batch sizes accordingly.
  6. Moisture-sensitive in the liquid stage. Application above 90% RH or exposure to dew/rain before full cure causes gloss loss and micro-bubbling. Substrate must be above the dew point (industry standard is 5°F above).
  7. Storage humidity is 0–80% RH — different from the 90% RH application maximum. Store Part A and Part B indoors in sealed containers in a controlled environment.
  8. Flash point of Part A is 60°F (15°C) — flammable solvent. Keep away from sparks and open flames. Use non-ferrous tools and conductive footwear in areas where explosion hazards exist. Use MSHA/NIOSH approved respiratory protection in enclosed spaces.

Frequently Asked Questions — Carbothane 133 LV

What is the VOC value for Carbothane 133 LV?
Carbothane 133 LV is 211 g/L (1.76 lbs/gal) per EPA Method 24 as supplied — the lowest VOC in the Carbothane 133/134 family. Thinner 236E (up to 16 oz/gal) and Thinner 242E (up to 16 oz/gal) maintain the 211 g/L VOC when used for spray thinning. Thinner 25, 214, and 215 all raise the VOC above that level. The product contains VOC-exempt dimethyl carbonate; check local regulations before specifying.
What is the coverage rate for Carbothane 133 LV?
At 72% volume solids (1,155 ft²/gal at 1 mil theoretical), Carbothane 133 LV covers 385 ft²/gal at 3.0 mils DFT and 231 ft²/gal at 5.0 mils DFT (theoretical). The recommended dry film thickness is 3–5 mils per coat; do not exceed 7 mils. Allow for application loss in all estimates.
What is the mix ratio and pot life of Carbothane 133 LV?
Carbothane 133 LV uses a 5:1 mix ratio by volume (Part A to Part B, Urethane Converter 811). Power mix Part A separately, then combine with Part B and power mix again. Do not mix partial kits. Pot life is 6 hours at 75°F — the longest in the Carbothane 133/134 family. Pot life shortens at higher temperatures. Moisture contamination will shorten pot life and cause gellation.
Which thinners maintain the 211 g/L VOC when thinning for spray?
Thinner 236E (up to 16 oz/gal) and Thinner 242E (up to 16 oz/gal) both maintain the 211 g/L VOC value when used for spray thinning. Thinner 25 at 7.3 oz/gal raises VOC to 249 g/L; Thinner 214 at 8 oz/gal raises it to 246 g/L. For brush and roller, Thinner 215 (up to 8 oz/gal) results in 249 g/L. Note: Thinner 242E contains VOC-exempt t-butyl acetate — check local regulations regarding its use.
What are the application temperature limits for Carbothane 133 LV?
Material temperature: 50–100°F; surface and ambient: 35–110°F; humidity: 0–90% RH. Substrate must be above the dew point (industry standard is 5°F above). The 35°F minimum surface temperature is one of the lowest for any polyurethane topcoat. With Additive 101, cure continues down to 20°F (–7°C). The product is moisture-sensitive — protect from dew and rain until fully cured.
Does Carbothane 133 LV have a maximum recoat time?
No. Carbothane 133 LV has indefinite recoatability. The surface must be clean and dry. As a practical test, wipe the surface with Thinner 25: if the film shows a slight tack, it is suitable for recoating without extensive surface preparation such as abrading.
How does Carbothane 133 LV compare to 133 HB and 133 LH?
133 LV is the lowest-VOC option (211 g/L), lowest HAPs, and has the longest pot life (6 hours) and highest volume solids (72%). Choose it for VOC-restricted jurisdictions or HAPs compliance requirements. 133 HB is the most economical satin-finish option with direct-to-inorganic-zinc capability and extensive ASTM performance data (4,000-hr salt fog) — best for general industrial steel. 133 LH meets SSPC Paint 36 Level 3 and provides a lower sheen — best for bridge/highway and industrial maintenance where glare reduction is specified. All three have indefinite recoat windows and 300°F continuous heat resistance.

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