Do you paint it on, let it dry and then heat it up until it melts?

Paint it on, let it dry, which takes almost no time. Than do your test for heat. Some advice... keep the bottle tightly closed and in an upright position. The solvent they use is highly volatile and if bottle is left open, it will dry out quickly.

Is there a special type of thinner needed?

Tempilaq comes ready to use right out of the bottle. I believe the manufacturer does make a thinner if yours gets too thick over time...

How long before the product you will ship me will expire? It's the 399/750 version

Can't how long before the product will ship that is up to Amazon. I do not think there is an expiration date I have used mine for several years.

The picture shows the temperature indicating fluid and thinner. does this product come with a bottle of thinner?

The product that I purchased was a single bottle product. I would have had to purchase thinner seperately. As Micky-1 stated, it would depend on who is selling it and how it is priced. This appears that it would not include the thinner

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Tempil 24407 TEMPILAQ Advanced Temperature Indicating Liquid, 163 Degree C/325 Degree F, 2 oz. Ideal for Heat Treating, Brass Annealing, and Glass Production, Made in USA

Product ID: 254789711

Details

Age Range (Description)
Adult
Brand
Tempil
Color
color does not
Display Type
Analog
Included Components
1 Bottle
Outer Material
Glass

🎯±1% °F accuracy

🧴2 oz easy-apply bottle

⏱️2000ms rapid response

S$103

Duties & taxes included

In stock

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Description

🔥 Nail the perfect temp every time with Tempilaq Advanced!

INSTANT PRECISION - Achieve reliable temperature verification within 2 seconds—no guesswork, no delays.
EFFORTLESS APPLICATION - In-cap brush ensures quick, mess-free coating on any surface, vertical or horizontal.
INDUSTRIAL GRADE SAFETY - Formulated n-Propyl Bromide-free for safe, hassle-free use in demanding environments.
VERSATILE HEAT MONITORING - Ideal for heat treating, brass annealing, glass production, and more—boost your process control.
CALIBRATION FREE CONFIDENCE - No calibration needed—consistent, accurate results every time, regardless of liquid color.

Tempilaq Advanced is a high-accuracy, quick-drying temperature indicating liquid that melts at 163°C (325°F) to visually confirm surface temperature. Designed for industrial applications like heat treating and glass production, it offers ±1% Fahrenheit accuracy, requires no calibration, and applies easily with an in-cap brush. This 2 oz bottle delivers safe, reliable, and reusable temperature verification to prevent costly errors and ensure quality control.

Specifications

ASIN	B00VRIUXCE
Additional Features	High Accuracy
Age Range (Description)	Adult
Age Range Description	Adult
Best Sellers Rank	#60,511 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in Temperature Indicators
Brand	Tempil
Brand Name	Tempil
Color	color does not matter for temperature indication
Customer Reviews	4.5 out of 5 stars 4 Reviews
Display Type	Analog
Global Trade Identification Number	00048615244075
Included Components	1 Bottle
Indoor Outdoor Usage	Outdoor
Item Length	3.75 inches
Item Weight	2 ounces
LowerTemperature Range	300 °F
Manufacturer	Tempil
Model	24407
Model Name	TEMPILAQ Advanced Temperature Indicating Liquid
Outer Material	Glass
Part Number	24407
Power Source	Battery Powered
Product Care Instructions	Wipe Clean
Response Time	2000 milliseconds
Reusability	Reusable
Special Feature	High Accuracy
Specification Met	Certification
Style Name	163 C/325 F
UPC	048615244075
Unit Count	1 Count
Upper Temperature Range	325 °F
Warranty Description	No Warranty

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TrustScore 4.5 | 7,300+ reviews

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