Is this different than the 357 bondo spreader? they're both made by 3m and appear to be the same size...is one more flexible or any other difference?

This is a simple piece of hard plastic. Not flexible.

Is the back completely flat?

Yes, there is NO raised text on the backside. There is the hole that you can see in the picture. However mine are/came warped - curved longway. Good luck with your project!

Hello can I use this to fix Partial board kitchen cabinets? Thanks so much

Not fully understanding the question, if you can use the spreader to fix a cabinet, the spreader will add no value to strength or structure to a cabinet. The spreader is used to spread body filler and glazes on surfaces.

Can you use this for touching up shower grout?

These are flat on the bottom but grout typically is "indented" a bit. It would be easier to use your (wet) finger or the bottom of a spoon to press in the grout.

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3M Dynatron, 358, 1 Pack of 3 Spreaders, 4”, 5” and 6”, Caulks | Used for Spreading of Fillers; Glazes and Putties

3M Dynatron, 358, 1 Pack of 3 Spreaders, 4”, 5” and 6”, Caulks | Used for Spreading of Fillers; Glazes and Putties

Product ID: 4982236

📏3 sizes (4”, 5”, 6”) for precision

♻️Reusable with easy cured material release

🛠️Flexible edges for smooth spreading

AR$33037

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Description

🛠️ Spread like a pro, finish like a boss!

BUILT TO LAST - Durable design withstands repeated use in demanding professional environments.
CLEAN READY ALWAYS - Non-absorbent surface prevents mess and speeds up your workflow.
EFFORTLESS PRECISION - Flexible edges ensure smooth, accurate spreading for flawless finishes.
PERFECT FIT EVERY TIME - Three versatile spreader sizes tailored for any filler or putty application.
TRUSTED INDUSTRY STANDARD - 3M Dynatron quality powering top-tier collision repair shops worldwide.

The 3M Dynatron 3-Pack Spreaders include 4”, 5”, and 6” flexible-edge tools designed for professional auto body repair. Their non-absorbent, reusable surfaces allow quick curing removal and easy cleaning, enhancing efficiency and precision in applying fillers, glazes, putties, and caulks. Trusted by industry pros, these spreaders deliver durability and versatility for flawless finishes.

Specifications

ASIN	B0015DMGD0
Best Sellers Rank	#6,983 in Automotive ( See Top 100 in Automotive ) #20 in Body Repair Putty #89 in Body Repair Tools
Customer Reviews	4.7 4.7 out of 5 stars (5,015)
Department	unisex-adult
Item Weight	2.82 ounces
Item model number	358
Manufacturer	3M
Product Dimensions	7 x 7 x 0.5 inches

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AR$33037

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered 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 Argentina.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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