MP 55350
Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics
Main features
- 15-26 Minute Open Time
- 0.125 in Gap Filling
- 3,000 psi Steel Shear
Product Description
H.B. Fuller MP-55350 Methacrylate Structural Adhesive is an extended-working-time two-part methyl methacrylate adhesive for structural bonding of metals, thermosets, thermoplastics, and composites. A 1:1 resin-to-activator mix provides a 15-26 minute open time for placement and alignment, followed by fixture in 35-55 minutes at 25 deg C. The material fills gaps up to 0.125 in and reaches full cure in 24 hours. Typical cured properties include Shore D 75 hardness, 3,190-4,640 psi tensile strength, and ASTM D1002 overlap shear of 3,000 psi on carbon steel and 2,800 psi on aluminum.
Key features
- Extended open time: Provides 15-26 minutes for placement and alignment at 25 deg C.
- Controlled fixture window: Develops fixture strength in 35-55 minutes at 25 deg C.
- Structural overlap shear: Reaches 3,000 psi on carbon steel and 2,800 psi on aluminum under ASTM D1002 conditions.
Applications / Suitable for
- Bonding aluminum, steel, stainless steel, and e-coated metal structures
- Bonding fiberglass, phenolic, gel coat, epoxy, and polyurethane components
- Bonding ABS, polycarbonate, nylon/PA, PVC, PEEK, and PBT or PET blends
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Chemistry TypeChemistry Type
Methyl MethacrylateColorColor
Off white or amberComponent SystemComponent System
twoDensity (g)Density (g)
0.98 g/cm3Thermal Properties
Flash PointFlash Point
10 °COperating TemperatureOperating Temperature
-67 to 250 °CAdditional Information
Technical properties
Uncured and working properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Mix ratio | 1:1 | by volume or weight | Resin to activator |
| Resin viscosity | 60,000-120,000 | cP | Brookfield RV7; 20 rpm; 25 deg C |
| Activator viscosity | 60,000-110,000 | cP | Brookfield RV7; 20 rpm; 25 deg C |
| Mixed density | 0.98 | g/cc | Typical |
| Open time | 15-26 | min | 25 deg C |
| Fixture time | 35-55 | min | 25 deg C |
| Full cure | 24 | h | Room temperature |
| Maximum gap fill | 0.125 | in | Bondline |
Technical properties
Cured properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Shore hardness | 75 | Shore D | ASTM D2240 |
| Tensile strength | 3,190-4,640 | psi | ASTM D638 |
| Overlap shear on carbon steel | 3,000 | psi | ASTM D1002; 25 deg C; 50% RH |
| Overlap shear on aluminum | 2,800 | psi | ASTM D1002; 25 deg C; 50% RH |
| Thermal service range | -67 to 250 | deg F | Cured adhesive |
