Is cabosil hs5 equivalent to cabosil m5?

Works good, you just have to keep adding a little at a time to your pre mixed resin/hardener mix until you get the right consistency for your job. Be sure to wear a good dust mask as this stuff is feather light & will blow all over, it weighs nothing.

can this be mixed with bondo to thicken?

Yes this can thicken bondo. Just be careful because if you add to much your bondo will be dry.

Is this hydrophobic or hydrophyllic?

CAB-O-SIL M-5 is widely used to provide thickening, thixotrophic (shearthinning), and anti-settling behavior in liquid systems. M-5 is most efficient in non-polar to medium polarity systems. M-5 offers the best balance of thickening efficiency and dispersibility

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Cabosil - Fumed Silica Thickener in Quart Tub

Cabosil - Fumed Silica Thickener in Quart Tub

Product ID: 451479849

Details

Brand
Fasco Epoxies
Item Form
Powder
Material
Silicon
Special Feature
Thixotropic

🌊Thixotropic control for smooth, non-sagging viscosity

🔧Boosts hardness, tensile & elongation in rubbers

⚖️Sub-micron particle size for ultra-fine dispersion

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Description

⚡ Elevate your mix game with Cabosil — where precision meets power!

VISCOSITY VIRTUOSO - Delivers a smooth, high-viscosity epoxy or polyester mix that resists sagging, perfect for flawless coatings and composites.
PRECISION FLOW MASTERY - Transforms sticky powders into free-flowing, easy-to-handle systems, eliminating clumps and boosting efficiency.
RUBBER REINFORCEMENT POWER - Significantly enhances silicone and organic rubber durability with improved hardness and tensile strength.
VERSATILE APPLICATION EDGE - Ideal for epoxy systems, silicone rubbers, organic rubbers, and even fly floatant uses—one product, endless possibilities.
ULTRA FINE PARTICLE ADVANTAGE - Sub-micron silica particles ensure uniform dispersion and superior performance in complex formulations.

Cabosil is a premium fumed silica thickener designed to enhance viscosity and flow in epoxy, polyester, and rubber systems. Its hydrophilic, sub-micron particles improve powder flow, reinforce silicone and organic rubbers by increasing hardness and tensile strength, and provide thixotropic control for smooth, non-sagging mixtures. Trusted by professionals for consistent, high-performance results in industrial and scientific applications.

Specifications

ASIN	B074Y6V7QT
Best Sellers Rank	#38,095 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #127 in Inorganic Reagents
Brand	Fasco Epoxies
Brand Name	Fasco Epoxies
Colour	Clear
Compatible Material	Rubber
Container Type	Pail
Customer Reviews	4.6 out of 5 stars 797 Reviews
Global Trade Identification Number	00819794020756
Item Form	Powder
Item Package Quantity	1
Manufacturer	Fasco Epoxies Inc.
Manufacturer Part Number	FIL01Q
Material	Silicon Dioxide (Silica)
Material Type	Silicon Dioxide (Silica)
Model	FIL01Q
Other Special Features of the Product	Thixotropic
Special Feature	Thixotropic
Specific Uses For Product	Epoxy Systems, Silicone Rubber, Organic Rubbers, Mixed Systems, Reinforcement, Viscosity Control, Non-Sagging Applications, Fly Floatant Specific Uses For Product Epoxy Systems, Silicone Rubber, Organic Rubbers, Mixed Systems, Reinforcement, Viscosity Control, Non-Sagging Applications, Fly Floatant See more
UPC	819794020756
Viscosity Level	High
Volume	1 Quarts
Water Resistance Level	Not Water Resistant

Reviews

A**E

Fasco Epoxies Cabosil

Good product.

11.01.2026

M**L

No lumps Silica

No lumps like other silica

6.06.2026

M**R

Don't wait too long...

worked great!

6.06.2026

C**I

Nice smooth, strong finish

Excellent for resin! Nice smooth finish! Highly recommended for thickening resin.

26.02.2026

H**S

Thought it was empty

Container was so light I thought it was empty so I took a video while opening it. It was not empty. I’m not sure why I bought this so I can’t say much about it except that I received it.

7.01.2025

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$112.65

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered 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 British Virgin Islands.

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TrustScore 4.5 | 7,300+ reviews

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