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Extreme® Assembly Adhesives Product Details
Product: EXT-308 SuperFast
MMA Structural Adhesives

Extreme 308 SuperFast is a medium viscosity, solvent free, methyl methacrylate structural adhesive system that provides flexibility, toughness and surface adhesion for bonding plastics and metals in any combination. Cured performance shows excellent adhesion and bond strength to aluminum, steel, various plastics, stone, ceramics as well as plain and/or plated metal components. This material can withstand thermal cycling and shock loading between dissimilar materials. Although it is always best to clean and prepare most bonded surfaces for improved adhesion. Extreme 308 SuperFast will work successfully in many applications without preparation. Extreme 308 SuperFast is a fast cure speed, two component product with an open time of 90-120 seconds and a fixture time of 6 minutes or less. For additional information please consult our Technical Data Sheet.

  • Color: White
  • Viscosity: 50,000cps mixed
  • Elongation: <60%
  • Mix Ratio by Volume: 1:1

Packaging: 25ml, 50ml, 220ml, 400ml, 5 gallon pail kit.

Tech Data »

Open Time (Min.)
Fixture Time (Min.)
Tensile Shear Strength (AL)
Impact Strength (Steel)
Peel Strength (AL)
Service Temperature
Hardness (Shore D)
Best For
2 - 3
5 - 6
3390 psi
20 ft/lbs
25 pli
-65 F to +260 F
Metals, Composites, Thermoset Plastics

Under no circumstance will Royal Adhesives & Sealants LLC. or its subsidiaries, the manufacturer, or the seller of its products be liable for incidental or consequential damages arising from the use of any of its products. Any damages in connection with the use of any of Royal's products by the buyer, seller, user or any other person are strictly limited to the purchase price of the product only. Customer accepts full responsibility. All installation guidelines must be followed. Refer to literature or call 1-800-227-6181 for installation guidelines


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