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 viscosity control

⚖️Sub-micron particle size for precision

🛠️Reinforces silicone & organic rubbers

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₩104354

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Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Elevate your epoxy & rubber game with Cabosil’s invisible strength boost!

TRUSTED BY PROS - 4.6⭐ rating from 756 reviews proves industry-leading performance and reliability
VISCOSITY VIRTUOSO - Significantly thickens epoxy and polyester systems for non-sagging, smooth finishes
PRECISION FLOW MASTERY - Sub-micron particles reduce powder angle of repose for flawless flow
RUBBER REINFORCEMENT POWER - Boosts hardness, tensile strength & elongation in silicone and organic rubbers
VERSATILE THIXOTROPIC AGENT - Controls viscosity solo or combined with fillers/fibers for ultimate mix stability

Cabosil Fumed Silica Thickener is a premium, hydrophilic colloidal silica powder designed to enhance flow, reinforce silicone and organic rubbers, and control viscosity in epoxy and polyester systems. Its sub-micron particle size and thixotropic properties ensure smooth, non-sagging, high-strength mixtures, making it a must-have for professional-grade formulations.

Specifications

ASIN	B074Y6V7QT
Brand	Fasco Epoxies
Brand Name	Fasco Epoxies
Colour	Clear
Compatible Material	Rubber
Container Type	Pail
Customer Reviews	4.6 out of 5 stars 756 Reviews
Global Trade Identification Number	00819794020756
Item Form	Powder
Item Package Quantity	1
Manufacturer	Fasco Epoxies Inc.
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	medium
Volume	1 Quarts
Water Resistance Level	Not Water Resistant

Reviews

A**E

Fasco Epoxies Cabosil

11.01.2026

J**D

Good product

24.02.2026

R**D

Use less than half your resin volume

19.02.2026

C**I

Nice smooth, strong finish

26.02.2026

A**R

Works!

25.06.2025

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