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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Fasco Epoxies - Fasco Cab-O-SIL Fumed Silica thickener in Quart tub

Product ID: 69559867

Details

Brand
Fasco Epoxies
Item Form
Powder
Material
Silicon
Special Feature
Thixotropic
Specific Uses For Product
Craft Repair

🔗Enhances adhesive strength

🧪Boosts viscosity, non-sagging effect

⚖️Lightweight powder, easy to handle

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Kz34623

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Description

⚡ Elevate your resin game with the ultimate thickening powerhouse!

SUPERIOR STABILITY - Delivers strong, reliable adhesion for gel coats, polyester, and ceramic applications.
OPTIMIZED USAGE RATIO - Use less than half resin volume for flawless consistency and maximum control.
VERSATILE COMPATIBILITY - Seamlessly blends with epoxy, silicone, varnishes, and more for multi-project use.
CRAFT REPAIR ESSENTIAL - Ideal for woodworking, furniture finishing, and tabletop coatings—professional-grade results.
PRECISION THICKENING POWER - Transforms epoxy and paints into perfect, non-drip coatings every time.

Fasco Cab-O-SIL Fumed Silica is a premium hydrophilic thickening powder designed to increase viscosity and prevent sagging in epoxy, silicone, paints, and varnishes. Lightweight and easy to use, it enhances adhesive strength and stability across multiple applications including gel coats and ceramic rigidizers. Trusted by professionals for precise control and superior finish quality.

Specifications

ASIN	B074Y6V7QT
Best Sellers Rank	#34,714 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #14 in Household Paint Additives
Brand Name	Fasco Epoxies
Color	Clear
Compatible Material	Epoxy Resin, Paint, Silicone
Container Type	Pail
Customer Reviews	4.7 4.7 out of 5 stars (822)
Global Trade Identification Number	00819794020756
Item Form	Powder
Item Package Quantity	1
Manufacturer	Fasco Epoxies Inc.
Material Type	Silicon Dioxide (Silica)
Model	FIL01Q
Other Special Features of the Product	Thixotropic
Part Number	FIL01Q
Specific Uses For Product	Craft, Repair, Woodworking, Furniture, Wood, Table Top Coating
UPC	819794020756
Unit Count	128.0 Fluid Ounces
Viscosity Level	High
Volume	1 Quarts
Water Resistance Level	Not Water Resistant

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