Special Heat-resistant Sheet Metal Grey for Powder

 

 

This putty is suitable for repair in the powder spraying process. It has quick construction, strong powder absorption power, relatively fine putty quality, is easy to apply and scrape, easy to sand, has good filling properties, good vertical construction without sagging. The coating film is smooth and delicate, and the coating structure is fine and dense. It is resistant to high temperatures (it can withstand a high temperature of 245°C without cracking, blistering or falling off). After fine grinding, there will be no contact marks on the edges. It is an excellent supporting product in the powder spraying industry and can meet the smooth effect of powder primers and topcoats.

 

 

It is suitable for various metals (such as bare iron, stainless steel, aluminum, galvanized sheet, etc.), glass fiber reinforced plastics, old paint films, and various two-component primer surfaces. It is especially suitable for the powder spraying industry that requires high-temperature baking.

 

 

Main ash index

Name	Item	Technical Index	Inspection Standard
Grey component	State Color appearance	No scaling, agglomeration or obvious particles Light yellow paste	Visual inspection Visual inspection

Film performance index

Item	Technical Index	Inspection Standard
Putty color and appearance	Light yellow, even after scraping	Visual inspection
Drying conditions	No obvious particles, scratches, cracks after drying
Dry grinding time h (25 ℃) ≤	1	GB/T1728
Consistency cm	8～11	GB/T1749
Gel time (application period) min ≥	3	GB/T1728
Adhesion kg/c㎡ ≥	55	GB/T5210
Flexibility mm ≤	50	GB/T1748
Impact strength kg • cm ≥	20 (or 40 Kg. cm without falling off)	GB/T1732
High temperature resistance ≥ 240 ℃	≥ 240 ℃ after drying	GB/T1735

 

1. Mix the main putty and curing agent at a ratio of 100:1-2 (to make the colors consistent), and use it up within the gel time. The construction time can be about 3 minutes, and dry grinding can be carried out within 20 minutes. 
2. Apply the prepared alloy gypsum on the polished two-component primer or the prepared sheet metal surface. If a thick coating is required, it is best to apply it in several thin layers to the required thickness. If air bubbles penetrate during application, they must be completely scraped open with a scraper to ensure good adhesion. Baking can be carried out 6 hours after application. For the assembly line process, the baking temperature is around 200°C. Baking can be carried out 2 hours after dry grinding.

Matters needing attention:

1. Once the putty is mixed with the curing agent, it will solidify easily and cannot be poured back into the can. After use, the lid should be tightly closed immediately to prevent the main putty from deteriorating due to the volatilization of the solvent.
2. The proportion of the curing agent can be adjusted, but the minimum dosage should not be less than 1%.
3. This product cannot be used on the surface of corrosive paints, synthetic resins or nitrocellulose primers, and one-component acrylic primers.
4. The storage period is 12 months.

 

Which is better putty or primer?

Putty and primer have different uses and properties

For example, the putty and primer used on metal parts are completely different in use and performance

The main purpose of putty used for metal parts is to fill up the uneven places, and the metal surface will be more smooth after painting. The primer used for metal parts is used to prevent corrosion and rust, isolate the metal surface from the air, reduce the oxidation of metal in the air, and achieve the performance of corrosion and rust prevention

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