Skip to content
FREE SHIPPING ON ALL ORDERS
FREE SHIPPING ON ALL ORDERS
Thermaline 450 epoxy coating kit by Carboline

Thermaline 450 glass-flake filled Novalac Epoxy

by Carboline
$602.38 - $2,380.12
$602.38
$602.38 - $2,380.12
$602.38
Thermaline 450 by Carboline is a two-component, glass-flake-filled epoxy novolac coating designed for high-performance protection in extreme environments. It offers excellent resistance to corrosion, abrasion, chemicals, and wet/dry cycling up to 450°F (232°C), making it ideal for both insulated and uninsulated steel and stainless steel surfaces.

Thermaline 450 Product Sheet >

What It’s Meant For:
Thermaline 450 protects against corrosion under insulation (CUI) and severe chemical exposure, per NACE SP0198 systems CS-1, CS-3, CS-4, SS-1, SS-2, and SS-3. Its novolac formulation and glass-flake reinforcement ensure durability on pipes, stacks, and equipment under thermal cycling and harsh conditions.

Common Industry Applications:

Petrochemical: Protects pipelines, reactors, and storage tanks exposed to corrosive chemicals and high temperatures.
Oil & Gas: Coats insulated and uninsulated pipes and equipment in refineries and offshore platforms.
Power Generation: Applied to stacks and equipment in power plants subjected to thermal cycling.
Pulp & Paper: Used on processing equipment exposed to corrosive environments and high temperatures.
Metals & Mining: Protects steel structures and equipment from abrasion and chemical attack in harsh mining conditions.
Marine: Suitable for offshore structures and marine equipment exposed to salt water and thermal stress.

This Coating is typically applied over properly prepared steel or stainless steel surfaces and may be used with Carbozinc inorganic zinc primers for enhanced corrosion protection.

Find our entire collection of Carboline Products Here >

THERMALINE 450 IS AVAILABLE IN 1-GALLON KIT AND 10-GALLON KIT, INCLUDING PARTS A & B.
Can be thinned up to 13 oz/gal (10%) with Carboline Thinner 213, or for horizontal surfaces, up to 13 oz/gal (10%) with Thinner 2. 

If your project needs a different Carboline coating or a specific color not listed, contact our customer support team at (800) 567-5358 to discuss your requirements.
Size: 1 Gallon Kit
Color: Red (0500)
Coverage Calculator
Thermaline 450 is a self-priming CUI epoxy — no separate primer is required on properly prepared carbon steel or stainless steel. It may also be applied over existing epoxies and phenolics in good condition. For exterior/uninsulated applications requiring UV resistance, topcoat with an approved polyurethane or modified silicone (contact Carboline for recommendations). No topcoat is needed for insulated CUI service. Do not use roller application — brush is for weld striping and touch-up only.

Compatible Thinners

Thinner Application Max Rate
Thinner 213 › Standard spray application — agitate before use (thick viscous appearance is normal) 13 oz/gal (10%)
Thinner 2 › Horizontal surface application only; also for equipment and spray line cleanup 13 oz/gal (10%)

Use only Carboline-supplied thinners. Use of any other thinner will adversely affect product performance and void the warranty.

Recommended Coating Systems

CUI System — Self-Priming, Insulated Carbon or Stainless Steel (NACE SP0198 CS-1, CS-3, CS-4 / SS-1, SS-2, SS-3)
CUI Barrier — You Are Here Thermaline 450 1–2 coats · 8–10 mils DFT total · self-priming · up to 450°F
Uninsulated System — Over Existing Epoxy or Phenolic (Maintenance / Recoat)
Existing Primer / Basecoat Compatible Epoxy or Phenolic existing coating in sound condition · sweep blast if max recoat time exceeded
→
High-Temp Barrier — You Are Here Thermaline 450 1–2 coats · 8–10 mils DFT total · up to 450°F
Atmospheric System — With UV-Resistant Topcoat (Uninsulated / Exterior Service)
CUI / High-Temp Barrier — You Are Here Thermaline 450 8–10 mils DFT · self-priming
→
UV Topcoat Polyurethane or Modified Silicone UV & gloss retention · contact Carboline for specific product recommendation
Extended Temperature System — Step Up to Thermaline Heat Shield for Service Above 450°F
Up to 450°F — You Are Here Thermaline 450 novolac epoxy · CUI rated · ambient cure
→
Up to 1200°F — Consider Instead Thermaline Heat Shield inorganic polymer · cryogenic to 1200°F · NACE SP0198 CS-6 / SS-5

Frequently Purchased Together

Carboline Thinner 213
Standard spray application thinner for Thermaline 450. Agitate before use — thick viscous appearance is normal. Max 13 oz/gal (10%).
Call (800) 567-5358 for pricing & availability
View Carboline Collection
Carboline Thinner No. 2 — horizontal surface thinning and cleanup for Thermaline 450
Carboline Thinner No. 2
For horizontal surface application (up to 13 oz/gal) and spray equipment cleanup after Thermaline 450 application.
From $129.87 / gal
Shop Now
Thermaline Heat Shield — extreme temperature CUI coating for service above 450°F
Thermaline Heat Shield
When your service temperature exceeds 450°F — or reaches cryogenic lows — step up to Heat Shield. Inorganic polymer, rated cryogenic to 1200°F, NACE SP0198 CS-6 / SS-5.
From $602.38 / 1-gal kit
Shop Now
Thermaline 440
Companion epoxy CUI coating also rated to 450°F with Carboline Rapid Tint Service (RTS) color availability. Alternative Thermaline epoxy for the same temperature range. NACE SP0198 CS-1, CS-3, CS-4 / SS-1, SS-2, SS-3.
Call (800) 567-5358 for pricing & availability
View Carboline Collection

Thermaline 450 High-Temperature CUI Epoxy Coating by Carboline

Thermaline 450 — High-Temperature CUI Epoxy Coating

Thermaline 450 — Amine-Cured Novolac Epoxy by Carboline.
A highly cross-linked, glass-flake filled epoxy delivering exceptional barrier protection and resistance to wet/dry cycling at elevated temperatures. Engineered for insulated or uninsulated pipes, stacks, and equipment operating up to 450°F (232°C). Superior abrasion, chemical, and permeation resistance with an ambient-temperature cure — no force cure required. Two-component system, 4:1 mix ratio (A to B).

✓ NACE SP0198 CS-1, CS-3, CS-4 & SS-1, SS-2, SS-3  •  ✓ Up to 450°F (232°C) Service  •  ✓ Ambient-Temperature Cure  •  ✓ Self-Priming  •  ✓ VOC Compliant (AIM)

✏️ Need a project quote? Request Online

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

Thermaline 450 by Carboline

Thermaline 450 high-temperature CUI epoxy coating by Carboline — 1 and 5-gallon kits
Thermaline 450 — High-Temperature CUI Epoxy Coating, 1 and 5-Gallon Kits

Shipping Map — Carboline Delivery Timing

Carboline US regional warehouse shipping map showing typical delivery transit zones by destination
Typical transit times vary by destination zone.

Shipping & Availability

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

Thermaline 450 ships from Carboline regional warehouses nearest to your location. Each kit includes Part A (base) and Part B (hardener).

Most orders ship within 2–3 business days. Transit times vary by destination zone.

Kit sizes: 1-Gallon Kit (12 lbs)  •  5-Gallon Kit (58 lbs)

Colors: Red (0500)  •  Grey (5742)

Technical Specifications

PropertyValue
Generic TypeAmine-Cured Novolac Epoxy
FinishEggshell
Standard ColorsRed (0500) · Grey (5742)
Solids by Volume70% ± 2%
Mix Ratio4:1 by volume (Part A : Part B)
Pot Life3 hours at 75°F (24°C) — reduced at higher temperatures. Do not mix partial kits.
Recommended DFT8–10 mils (203–254 microns) in 1 or 2 coats · Max 15 mils per coat
Coverage @ 8.0 mils140 ft²/gal theoretical. Reference: 1,123 ft²/gal @ 1 mil. Allow for application loss.
Coverage @ 10.0 mils112 ft²/gal theoretical
Max Service Temp.450°F (232°C)
PrimerSelf-priming on steel and stainless steel. May also be applied over existing epoxies and phenolics.
TopcoatsPolyurethane or modified silicone for added UV resistance on exterior/uninsulated service. Contact Carboline for recommendations.
ThinningUp to 13 oz/gal (10%) with Thinner 213. Horizontal surfaces: Thinner 2. Use only Carboline-supplied thinners.
CleanupThinner 2 or Acetone
Min App Temp55°F (13°C) material · 50°F (10°C) surface & ambient. Substrate must be above dew point.
Flash Point — Part A53°F (12°C) — flammable below ambient temperature
CertificationsNACE SP0198 CS-1, CS-3, CS-4 · SS-1, SS-2, SS-3
Shelf Life36 months minimum at 75°F (24°C) in original sealed containers (Parts A & B)
Storage40°–110°F (4°–43°C) · 0–90% RH · Store indoors
Kit Sizes1-gallon kit (12 lbs) · 5-gallon kit (58 lbs)

Source: Carboline Thermaline 450 PDS (August 2024, doc 0928).

Substrates, Surface Prep & Applications

Surface Preparation

All surfaces must be clean and dry per SSPC-SP1 solvent cleaning before primary prep.

SubstrateRequirement
Carbon Steel (Insulated)SSPC-SP10 Near-White Blast · 2.0–3.0 mil angular profile
Carbon Steel (Non-Insulated)SSPC-SP6 Commercial Blast · 2.0–3.0 mil angular profile
Stainless SteelSSPC-SP16 · Dense angular 2.0–3.0 mil profile via abrasive blasting. Remove all embedded iron and chlorides.

Typical Applications

ApplicationDetails
CUI (Corrosion Under Insulation)Primary use. Carbon steel and stainless steel pipe/equipment under insulation up to 450°F. NACE SP0198 CS-1,3,4 and SS-1,2,3 compliant.
Uninsulated High-Temp ServicePipes, stacks, and equipment operating up to 450°F. Topcoat with polyurethane or silicone for exterior UV resistance.
Wet/Dry Cycling EnvironmentsExcellent resistance to wet/dry cycling at elevated temperature — ideal for equipment with intermittent service.
Chemically Aggressive EnvironmentsNovolac modification resists severe chemical attack. Superior abrasion and permeation resistance.
Cryogenic & Thermal CyclingAdditionally tested for cryogenic service per Thermaline series testing (see brochure). Contact Carboline to confirm suitability for your specific service.

Mixing Instructions

Step 1: Power mix Part A and Part B separately.

Step 2: Combine at 4:1 by volume (Part A to Part B) and power mix to uniformity.

Pot life: 3 hours at 75°F. Do not mix partial kits.

Thinning: Use only Thinner 213 (up to 13 oz/gal) or Thinner 2 for horizontal surfaces. Using unapproved thinners may adversely affect performance and will void the product warranty.

Curing Schedule

Based on 8.0–10.0 mil DFT. Higher film thickness or low ventilation requires longer cure times.

Surface Temp. Dry to Handle Dry to Recoat Final Cure Max Recoat Time
50°F (10°C)18 hours48 hours21 days21 days
60°F (16°C)12 hours32 hours14 days14 days
75°F (24°C)6 hours16 hours7 days7 days
90°F (32°C)3 hours8 hours4 days4 days
Max Recoat Time Exceeded? If the maximum recoat window has passed, abrade the surface by sweep blasting before applying additional coats. Any humidity haze or blush must be removed by water washing before recoating.

Good to Know Before You Buy

⚠️ Critical Notes
  1. Part A flash point is 53°F (12°C) — flammable below ambient temperature. Keep away from sparks, open flames, and ignition sources during mixing and application. Ensure adequate ventilation to keep solvent vapors below the lower explosion limit, especially in enclosed areas.
  2. Never exceed 15 mils DFT per coat. The correct system is 8–10 mils achieved in 1 or 2 coats. Excessive film thickness can trap solvents, slow cure, and lead to premature failure.
  3. Do not mix partial kits. Thermaline 450 must be mixed at the correct 4:1 ratio to cure properly. Partial kit mixing risks off-ratio batches that will not achieve the specified performance.
  4. Epoxies chalk and discolor in UV/sunlight exposure. For exterior or uninsulated applications with UV exposure, topcoat with an approved polyurethane or modified silicone. Contact Carboline for specific topcoat recommendations.

Frequently Asked Questions — Thermaline 450

What is the maximum service temperature for Thermaline 450?
Thermaline 450 is rated for service up to 450°F (232°C). It is suitable for both insulated and uninsulated pipes, stacks, and equipment operating at elevated temperatures. It is also tested for cryogenic service — contact Carboline to confirm suitability for your specific cryogenic application.
What is the coverage rate?
Based on 70% volume solids. At 8.0 mils: approximately 140 ft²/gal theoretical. At 10.0 mils: approximately 112 ft²/gal theoretical. Always allow for application loss. The recommended system is 8–10 mils in 1 or 2 coats; do not exceed 15 mils per coat.
Does Thermaline 450 require a primer?
Thermaline 450 is self-priming on properly prepared carbon steel and stainless steel. It may also be applied over existing epoxies and phenolics in good condition.
Can Thermaline 450 be applied to stainless steel?
Yes. Prepare stainless steel to SSPC-SP16 with a dense angular 2.0–3.0 mil profile via abrasive blasting. Remove all embedded iron and chloride contamination before application to ensure proper adhesion and coating performance.
Does Thermaline 450 require force curing?
No — Thermaline 450 cures at ambient temperature, which is one of its key advantages. No force cure or oven baking is required. Cure times depend on surface temperature; at 75°F the coating is dry to handle in 6 hours and reaches final cure in 7 days.
Can Thermaline 450 be topcoated?
Yes, for applications requiring UV resistance. Thermaline 450 may be topcoated with polyurethane or modified silicone coatings. Contact Carboline for specific product recommendations based on your service environment. No topcoat is needed for insulated service.
What kit sizes are available?
Thermaline 450 is available in 1-gallon kits (12 lbs) and 5-gallon kits (58 lbs). Each kit contains Part A and Part B mixed at a 4:1 ratio. Do not mix partial kits. Use the coverage table above to estimate your project quantities and round up.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare