3M Scotch-Weld DP420 Toughened Two-Part Epoxy Adhesive

3M Scotch-Weld DP420 Toughened Two-Part Epoxy Adhesive by 3M Industrial Adhesives (SKU: 3M-DP420-CASE) provides an ASTM D638 Tensile Strength of 36 MPa (5,221 psi), ASTM D648 Heat Deflection Temperature (HDT) of 82 °C (180 °F), ASTM D790 Flexural Strength of 54 MPa, and Brookfield viscosity of 45000 cPs.

Required companion cure and process materials for 3M Scotch-Weld DP420 Toughened Two-Part Epoxy Adhesive include: Norox MEKP-925H Low-Hydrogen Peroxide Initiator (1.8%), Vinyl Ester Skin-Coat Resin, Divinycell / Corecell Sandwich Cores. Category Engineering Rule: GELCOAT THICKNESS & CURE: Spray at 18–22 mils (450–550 microns) wet film thickness using 1.8% low-water MEKP. Must reach tack-free cure before applying skin-coat laminate.

Approved cross-referenced drop-in equivalents for 3M Scotch-Weld DP420 Toughened Two-Part Epoxy Adhesive in the North American ASTM index include ITW Plexus MA310, HK Research MaxGuard NP. Direct head-to-head engineering comparisons are available against ITW Plexus MA310 Structural Methacrylate Adhesive, HK Research MaxGuard NP White Marine ISO/NPG Gelcoat, ITW Plexus MA530 Toughened Structural Methacrylate Adhesive.

3M Scotch-Weld DP420 Toughened Two-Part Epoxy Adhesive is classified under US DOT 49 CFR and Transport Canada TDG as Class 8 Corrosive (UN Number: UN2735). It ships from regional US hubs in Hickory, NC, Danvers, MA, Tampa, FL with a typical lead time of 1-3 Days. When ordered with Class 5.2 Organic Peroxides (MEKP UN3105), 49 CFR § 177.848 hazmat segregation applies.

3M Scotch-Weld DP420 Toughened Two-Part Epoxy Adhesive is qualified for Airless / HVLP Spray, Pneumatic Meter-Mix Bonding, Mold Tooling. Primary industrial applications include Hull-to-Deck Flange Bonding, Showroom Marine Gelcoat Finish, Composite Mold Release.