Will this mix with other transfer liquids ?

I would get in touch with the manufacturer and ask them first, I know some solar thermal heat transfer products are incompatible. I think the E100 is mono ethylene glycol MEG but check first!

Can we use this in electric radiators?

No. This product is for solar panels not for electric heaters.

Can this be used with a wet underfloor heating system?

No, this is for solar heating system, underfloor heating is the same as radiators - water with inhibitor

Can you recommend a compatible pump to use with this solution?

you need a magnetic drive 12 or 24 volt solar pump if you are using it for solar. Either way a magnetic drive pump is what you need for chemicals.

E100 Solar Thermal Heat Transfer Fluid

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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€ 124.11

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

❄️ Stay ahead of the freeze—power your solar system with E100’s ultimate chill defense!

READY TO USE FORMULA - No mixing, no hassle—just add E100 directly to your system for instant, full-strength protection.
FREEZE PROOF CONFIDENCE - Engineered to shield your solar system down to a chilling -20°C, ensuring uninterrupted performance even in the harshest winters.
BUILT IN BIOCIDE DEFENSE - Safeguard your investment with integrated biocide that prevents microbial growth and system corrosion.
PRECISION PROTECTION CHECK - Use a refractor to verify optimal freeze protection, guaranteeing peace of mind with every fill.
SYSTEM CLEANSE COMPATIBILITY - Maximize efficiency by pairing with C300 flush, following BS7593:2006 standards for a pristine, long-lasting solar setup.

E100 Solar Thermal Heat Transfer Fluid is a premium, pre-mixed 5L solution designed to protect solar heating systems down to -20°C. It combines mono ethylene glycol, inhibitors, and biocide to prevent freezing, corrosion, and microbial growth. Ready to use without dilution, it ensures hassle-free maintenance and optimal system longevity, backed by industry standards and trusted by professionals.

Reviews

A**A

Product is already diluted

Was reading fluid normally needs diluting but this is already at strength but problem is not enough fluids available to dilution not as required.

9.05.2026

A**R

Perfect for my requirements.

Used for topping up solar water heating circuits.

8.11.2022

T**L

A really good product and a good price

Used in my solar hot water system very good product .

7.05.2022

T**R

E100 Solar Thermal Heat Transfer Fluid 5L

Excellent service...just what I wanted

2.01.2023

M**.

The pipes to my solar panels have not frozen up yet

I Iike feeling safe

1.10.2021

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€ 124.11

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews

ASIN	B08KY2H6RT
Batteries Required?	No
Batteries included?	No
Customer Reviews	4.5 4.5 out of 5 stars (29)
Date First Available	5 Oct. 2015
Item Package Quantity	1
Item Weight	5 kg
Manufacturer	Trade Chemicals
Manufacturer reference	C100S25
Part Number	C100S25
Size	5L

E100 Solar Thermal Heat Transfer Fluid

Description

Specifications

Reviews

Common Questions