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”, Used for Spreading of Fillers, Caulks, Glazes and Putties

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

Product ID: 256732089

📏3 sizes (4”, 5”, 6”) for precision

♻️Non-absorbent surface for easy cleanup

🛠️Flexible edge for smooth spreading

₩21929

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Description

🛠️ Spread like a pro, finish like a boss!

CLEAN READY ALWAYS - Non-absorbent surface prevents material buildup, speeding up your workflow.
EFFORTLESS APPLICATION - Flexible edges ensure smooth, accurate spreading with minimal effort.
PERFECT FIT EVERY TIME - Three versatile spreader sizes tailored for any filler, caulk, glaze, or putty job.
QUICK MATERIAL RELEASE - Cured filler pops off easily, so you stay productive without downtime.
TRUSTED INDUSTRIAL STRENGTH - 3M quality designed for professional-grade results in demanding environments.

The 3M Dynatron 358 pack includes three durable spreaders (4”, 5”, and 6”) designed for precise application of fillers, caulks, glazes, and putties. Featuring flexible edges and a non-absorbent surface, these tools ensure smooth spreading, easy cleanup, and quick material release—ideal for industrial use and professional results every time.

Specifications

ASIN	B0015DMGD0
Best Sellers Rank	#77,717 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #93 in Caulk
Brand	3M
Customer Reviews	4.7 4.7 out of 5 stars (4,816)
Date First Available	7 August 2012
Item Weight	80 g
Item model number	358
Manufacturer	3M
Manufacturer Part Number	358
Model	358
OEM Part Number	358
Product Dimensions	17.78 x 17.78 x 1.27 cm; 80 g

Reviews

S**F

Useful tools make the job easier

Good, useful spreaders for my woodwork finishing projects.

9.04.2026

M**.

Buen producto. Práctico y fácil de limpiar.

Las uso para aplicar el Rubio Monocoat, aunque sé que se pueden usar para otro tipo de cosas también. Hechas de plástico, así que al final solamente remueves el material con tus dedos y quedan limpias como al principio. El tamaño es perfecto. Al principio aplicaba el material con una tarjeta de banco vencida o con una espátula metálica, pero definitivamente esto va mejor. Definitivamente lo recomiendo y el precio bastante sensato. Bonitas hasta de color. 3 por paquete.

13.08.2026

O**Z

Eficiente y muy buen producto

Para los que buscan un buen aplicado de masilla automotriz recomendable. bueno siempre hay opiniones pero para mí es un producto y pláctico para aplicación de masillado automotriz .

24.01.2024

W**E

Cheap and very useful

Great entry level quality!

5.04.2026

M**.

Buen producto.

Muy buen producto al venir tres medidas en el pack, se extiende la masilla o pasta muy bien

24.05.2023

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₩21929

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered 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 South Korea.

Secure transaction

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