Check out our Videos Section for more product info and how to videos - - - - - - We do Custom Formulations! Click for more info.

Bonstone Fast Set ExtremeBonstone Fast Set Extreme EpoxyBonstone Repair Dutchman

Bonstone Fast Set Extreme



Quick Overview

Bonstone Fast Set Extreme is a knifegrade (non-sag) exterior epoxy system is suggested for fast setting or cold weather applications where initial setting speed or use in cold temperatures is critical. Unlike most epoxies, Fast-Set™ cures at below freezing temperatures.

The cartridge system eliminates measuring and mixing the two components. Bonstone Fast Set Extreme is easy to use and great for assembly line epoxy fabrication. Not recommended for interior application-strong odor when applying.

For 250 ml cartridges, use this applicator gun.

Some of the larger projects Bonstone Fast Set Extreme has been used on include Old Soldier's Home in Washington DC.

"I used Fast Set Extreme to glue down 2 five foot tall bronze elephants to a concrete base. The client had them moved. They had to break up the concrete and grind the concrete from the feet of the elephants. Pretty impressive!!!!" --Joe M.


“Used the Fast Set Extreme for the first time today. Awesome product. I do high end renovations that no one else wants to attempt This is by far the best epoxy on the market!”--David R. with Rioux Renovations

  • Re-attaching stone
  • Setting cemetery markers
  • Laminating
  • Structural bonding of natural stone, concrete, masonry, metals, wood, etc
  • Anchoring of bolts, dowels, rebar, pins, etc
  • Structural repair of natural stone, concrete, masonry, metals, wood, etc
  • Crack injection and repair for natural stone, concrete, wood, etc
  • Seals cracks and around injection ports prior to pressure-injection grouting
  • Pick-proof sealant around windows, doors, lock-ups, etc., inside correctional facilities
  • Cures at below-freezing temperatures
  • Very fast setting
  • Exceptional strength and durability
  • Knife grade (non-sag) viscosity
  • Moisture tolerant
  • High modulus
  • Flowing grade system refer to Fast Set 41







Mix Ratio = 1:1 by volume

Set Time = 15 min @ 75°F

Available in = Cartridges, Gallons & Pails

adobe-small.jpg Fast Set Extreme 600 ml Cartridge Mix Instructions 

adobe-small.jpg Fast Set Extreme 250 ml Cartridge Mix Instructions  

adobe-small.jpg Technical Data Sheet (prior to January 1, 2016)

adobe-small.jpg Technical Data Sheet (after January 1, 2016)

adobe-small.jpg SDS (prior to January 1, 2016)

adobe-small.jpg SDS (after January 1, 2016)

Extreme Video

Test Data and Specs (prior to January 1, 2016)

Can be tinted with Liquid tints.

For 250ml cartridge, use with Large Pro Tip Nozzle 280AN226

For 50ml cartridge, use with Extra Small Nozzle 295-620


Limestone Turret Repair

Memorial Bench

Marble Dutchman

Limestone Columns

Limestone Stone Return

Corner Repair Before & After

Stone Veneer

Re-setting Headstone

MORE IMAGES (click to enlarge)