ITW Plexus MA420 High-Impact Stringer Bonding Adhesive

ITW Plexus MA420 High-Impact Stringer Bonding Adhesive by ITW Performance Polymers (SKU: ITW-MA420-5GAL) provides an ASTM D638 Tensile Strength of 19.2 MPa (2,785 psi), ASTM D648 Heat Deflection Temperature (HDT) of 82 °C (180 °F), ASTM D790 Flexural Strength of 37.2 MPa, and Brookfield viscosity of 135000 cPs.

Required companion cure and process materials for ITW Plexus MA420 High-Impact Stringer Bonding 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 ITW Plexus MA420 High-Impact Stringer Bonding 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, Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive.

ITW Plexus MA420 High-Impact Stringer Bonding Adhesive is classified under US DOT 49 CFR and Transport Canada TDG as Class 3 Flammable Liquid (UN Number: UN1133). 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.

ITW Plexus MA420 High-Impact Stringer Bonding 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.