Thermaltake CL-W246-OS00GR-A Green Pastel Water Cooling Solution — main product image

Thermaltake CL-W246-OS00GR-A Green Pastel Water Cooling Solution

Thermaltake

Thermaltake CL-W246-OS00GR-A Green Pastel Water Cooling Solution

Name: Thermaltake CL-W246-OS00GR-A Green Pastel Water Cooling Solution
Brand: Thermaltake
SKU: CL-W246-OS00GR-A

★★★★★4.5 (403 reviews)

Thermaltake's low-viscosity pastel coolant cuts airlock risk while delivering vibrant, long-lasting color to custom loops.

$39.78*$39.99Save 0%

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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Thermaltake P1000 Pastel Water Cooling Solution in green is a pre-mixed, opaque coolant formulated for custom PC water-cooling loops. Its 1000 ml volume is sized to fill most mid-tower builds with dual-radiator configurations in a single bottle. The defining technical characteristic is its reduced viscosity — Thermaltake rates it at 26.4% lower than competing pastel coolants at 20°C and 25.8% lower at 40°C — which translates to minimal additional pump load compared to distilled water. The formula includes a surface tension optimizer that helps the liquid flow into tight spaces during filling, reducing the persistent air bubbles that plague initial loop priming. Anti-corrosion additives based on 1,2-Propanediol (6%) protect copper, nickel, brass, and acetal components from galvanic degradation.

This coolant is built for enthusiasts who want the visual impact of an opaque pastel loop without sacrificing thermal transfer efficiency. It fits any standard G1/4 threaded custom loop and works with D5, DDC, and similar pumps without cavitation concerns. The trade-off, as with all pastel coolants, is maintenance: the suspended pigment demands annual flushing and replacement to prevent deposits in microfin waterblocks. Thermaltake backs the product with a 2-year warranty and markets it as an eco-friendly option using biodegradable materials, making it a reasonable choice for builders who commit to regular loop maintenance schedules.

Key Features

Better formula - by adding a liquid surface tension Optimizer, the P1000 Pastel Water Cooling Solution Series minimizes the risk of airlock.

Vivid colors - comes in five non-transparent colors; red, blue, white, Green and yellow. The latest TT formula ensures color saturation, stability and duration.

Flow like pure water - low viscosity enables its effective flow. At 20°C, P1000 Pastel water cooling solution has 26.4% lower viscosity than other coolant and 25.8% lower at 40°C.

Anti-corrosive solution - non-flammable and provides great protection for the entire cooling system from corrosion.

Eco-friendly - produced with the environment in mind, P1000 is made with biodegradable materials and does not pollute the environment or Bio accumulates.

2 year Warranty

Specifications

Brand

Thermaltake

Model

CL-W246-OS00GR-A

Volume

1000 ml

Color

Green (Pastel / Opaque)

Type

Pre-mixed Pastel Coolant

Formula

Anti-Corrosion, Anti-Freeze, Airlock Minimizing

Hazardous Component

1,2-Propanediol 6% (CAS 57-55-6, EC 200-338-0)

Viscosity (vs. competitors)

26.4% lower at 20°C, 25.8% lower at 40°C

Eco-Friendly

Yes — biodegradable materials

Warranty

2 Years

Pros & Cons

👍 Pros

26.4% lower viscosity than competing pastel coolants at 20°C, preserving flow rate and thermal performance
Anti-corrosion formula with 1,2-Propanediol protects mixed-metal loops including copper, nickel, and brass
Surface tension optimizer reduces airlock during filling, cutting setup time on complex loops
1000 ml capacity covers most dual-radiator builds in a single bottle
Biodegradable formula with a 2-year manufacturer warranty

👎 Cons

Pastel pigment particles can settle and leave residue in microfin CPU and GPU blocks over time
Requires full loop flush and replacement every 12 months to maintain color saturation and corrosion protection
Cannot be mixed with other coolant brands or clear fluids without risking chemical incompatibility and clumping
Green color accuracy may shift slightly under different RGB lighting compared to product photos
No biocide additive included, so biological growth is possible if the loop seal is compromised

Frequently Asked Questions

Is the P1000 compatible with copper, nickel, and brass fittings commonly used in custom loops?

Yes, the P1000's anti-corrosive formula is designed to protect mixed-metal loops including copper, nickel, and brass components. It will not degrade O-rings or acrylic reservoirs under normal operating conditions.

How does the viscosity of this coolant compare to distilled water, and does it affect pump performance?

Thermaltake claims 26.4% lower viscosity than competing pastel coolants at 20°C. In practice, this means your D5 or DDC pump will not need to work significantly harder than with distilled water, keeping flow rates and thermals close to clear-coolant baselines.

How often should the P1000 be replaced in a loop?

Thermaltake recommends replacing the coolant every 12 months. Over time, pastel pigments can settle or the anti-corrosive additives lose effectiveness, which may lead to buildup in blocks and radiators if left beyond the service interval.

Does the pastel pigment cause staining or clogging in microfin CPU and GPU blocks?

Pastel coolants carry suspended pigment particles that can deposit in fine-channel blocks over extended use. Flushing the loop during coolant changes and avoiding mixing with other brands minimizes this risk, but some residue over a 12-month cycle is expected.

What is the total volume, and is one bottle enough for a typical dual-radiator loop?

Each bottle contains 1000 ml. A standard dual-radiator loop with a 240mm and 360mm radiator typically requires 600–900 ml, so one bottle is usually sufficient with a small reserve for topping off.