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Selsil Plastic Welding MMA: A Technical Overview
Selsil Plastic Welding MMA is a two-part methacrylate adhesive designed for fast, permanent bonding of difficult substrates like ABS, acrylic, fibreglass, and polycarbonate. Supplied in a convenient 28 g syringe, it features a built-in mixer for simple hand application — no dispensing gun required. With its high peel, shear, and impact resistance, this adhesive is ideal for auto repairs, plastic panel assembly, marine fit-outs, and signage fabrication. It cures at room temperature and requires no surface primers, making it easy to use in both workshop and field conditions.
Core Features & Specifications
- Two-part MMA adhesive in syringe format (28g)
- Pre-mixed through static nozzle — no separate gun required
- Strong bonds to plastic, fibreglass, and metal substrates
- Room temperature cure with fast fixture time (10–12 minutes)
- Withstands vibration, impact, and thermal stress
- Primerless adhesion to most common engineering plastics
- Gap filling up to 3 mm
- Made for auto body, signage, marine, and OEM use
Why Professionals Choose Selsil
- No tools, no waste — syringe format is ready-to-go
- Fast bonding even on oily or low-energy plastic surfaces
- Permanent, weather-resistant bonds for tough environments
- Perfect for mobile repair vans or workshop use
- Clean dispensing — ideal for detailed work
Applications in Practice: Trade Scenarios
For Auto Technicians: Repair ABS Bumper Damage On-Site
The Challenge
ABS bumper cracks are difficult to fix long-term without distortion or primer issues.
The Solution
The syringe-format MMA applies quickly, cures fast, and holds under road vibration. Keep one in every glove box or mobile van.
For Sign Installers: Bonding Acrylic to Coated Metal Fascias
The Challenge
Mixed materials can expand and flex with weather, causing cracking or de-bonding.
The Solution
MMA adhesive flexes slightly while maintaining strength. Quick to apply with no mixing mess or cleanup.
For Boatbuilders: Fibreglass Trim Assembly Without Clamps
The Challenge
Marine adhesives must resist salt, shock, and movement while working cleanly in tight spaces.
The Solution
This MMA system fills gaps and sets in 10–12 minutes — no clamps or gun needed. Perfect for detail bonding in marine fit-outs.
Frequently Asked Questions
What plastics does Selsil Plastic Welding MMA bond to?
It forms strong, permanent bonds to ABS, acrylic (PMMA), polycarbonate, fibreglass (GRP), rigid PVC, and many coated metals. It is not suitable for PE, PP, PTFE, or silicone rubber.
Do I need a dispensing gun or special tools?
No gun needed — the product comes in a 28 g syringe with a static mixer tip. Simply push the plunger to apply; ideal for mobile or small-scale use.
How long do I have to position the parts after applying?
You have approximately 3–6 minutes of working time before the adhesive begins to gel. After 10–12 minutes, it reaches handling strength.
Can I use it outdoors or in marine environments?
Yes. Once cured, it’s highly resistant to moisture, UV, vibration, and salt exposure. It’s suitable for marine, exterior signage, and vehicle repairs.
How should I store unused adhesive?
Keep the syringe sealed and store it in a cool, dry place between 5–25 °C. Avoid heat and direct sunlight. Shelf life is up to 12 months unopened.
Applications & Benefits
| Application | Key Benefit | Relevant Trades |
|---|---|---|
| Repairing cracked ABS or polycarbonate vehicle trims | Fast curing without clamps; no primer needed | Auto Body Repair, Mechanics |
| Bonding signage panels (acrylic to metal) | High UV resistance; impact-tough adhesive | Signmakers, Installers |
| Marine trim and GRP housing assembly | Moisture-resistant bond for exterior conditions | Marine Fit-Out, Boatbuilders |
| Plastic-to-metal part assembly in field repairs | Compact syringe format enables tool-free application | Mobile Technicians, Maintenance Crews |
| Quick structural bonding of plastic brackets or enclosures | High tensile and peel strength with minimal surface prep | OEM Assemblers, Product Repair |
How to Use Selsil Plastic Welding MMA
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Step 1: Surface Preparation
Clean all bonding surfaces thoroughly. Remove dirt, oil, grease, and surface oxidation. For best results, lightly abrade glossy plastics and metals, then clean with isopropyl alcohol.
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Step 2: Open and Attach Nozzle
Twist off the syringe cap. Attach the static mixing nozzle (provided) to ensure even 1:1 mixing of both adhesive components during application.
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Step 3: Apply the Adhesive
Push down on the syringe plunger to dispense the adhesive onto one surface. Apply a uniform bead and bring parts together immediately.
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Step 4: Assemble & Hold
Align parts precisely and hold for 10–12 minutes until initial cure. Clamping is only required for heavy or misaligned components.
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Step 5: Final Cure
Allow 24 hours for full cure at room temperature. Avoid heavy loads or exposure to water during this period.
Limitations & Safety
Product Limitations
- Not suitable for low surface energy plastics such as polyethylene (PE), polypropylene (PP), or PTFE (Teflon).
- Do not apply to dirty, oily, or wet surfaces — surface prep is essential.
- Not recommended for silicone rubber or elastomers.
- Avoid prolonged exposure above 120 °C once cured.
Safety Precautions
- Use in a well-ventilated area to avoid inhalation of fumes.
- Wear safety glasses and chemical-resistant gloves during use.
- Keep away from open flames — product is flammable until cured.
- Dispose of unused material and packaging in accordance with local regulations.
Emergency First Aid
- Eye Contact: Rinse immediately with plenty of water for 15 minutes and seek medical help.
- Skin Contact: Wash with soap and water. Remove contaminated clothing.
- Inhalation: Move to fresh air. Get medical attention if symptoms occur.
- Ingestion: Do not induce vomiting. Rinse mouth and consult a doctor immediately.
Plastic Welding MMA Application Guide
ABS & Polycarbonate
Surface Preparation
Ensure all bonding surfaces are clean, dry, and free from mould release agents, oils, and oxidation. Abrade with fine grit sandpaper if necessary and wipe with isopropyl alcohol for optimal adhesion.
Primer Requirements
No primer typically required
Plastic Welding MMA has strong adhesion to ABS and PC substrates without primer in most applications.
—Acrylic (PMMA)
Surface Preparation
Remove any surface stress or oxidation using fine sanding and cleaning with solvent. Ensure surfaces are smooth and dry before bonding.
No primer typically required
Plastic Welding MMA chemically bonds well to PMMA without priming under standard conditions.
—PVC & Vinyl
Surface Preparation
Wipe with a PVC-safe cleaner or isopropyl alcohol to remove surface plasticisers. Light abrasion may be beneficial for aged or gloss-finished PVC.
Primer recommended for optimal adhesion
On flexible vinyls or high-plasticiser PVC, use a surface activator or test adhesion strength before full use.
Adheseal Vinyl ActivatorFibreglass (FRP)
Surface Preparation
Sand with 120–180 grit to remove gelcoat and roughen bonding surface. Clean thoroughly with acetone or isopropyl alcohol and ensure no moisture is present.
No primer typically required
Plastic Welding MMA bonds directly to sanded fibreglass laminates without priming.
—Metal (Aluminium, Mild Steel)
Surface Preparation
Degrease with acetone, abrade with 80–120 grit for mechanical key, and clean again before application. Ensure surface is dry and free of rust or oxide layers.
Primer required for critical applications
Use Adheseal Metal Primer 601 for maximum bond reliability on bare metals or in high-load applications.
Adheseal Metal Primer 601
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