To glue polycarbonate, select a joint and adhesive for the actual PC grade, mating material, load and environment; then approve a production-like test coupon after the complete cure. A label saying “for plastic” cannot tell you whether your coated or stressed PC part will craze, peel or lose impact performance.
Send a PC fabrication inquiry See PC fabrication capabilities
First decide what the bond must do
Read the sketch: both blue pieces are PC sheet. An in-plane force across the orange overlap mainly loads the adhesive in shear; lifting an edge of the orange butt seam loads its smaller interface in peel. This explains the design question, not a safe load rating.
Use the assembly to shortlist a bonding method
| Assembly and job | Candidate route to ask about | Evidence needed before production |
|---|---|---|
| PC to PC, appearance-critical or rigid assembly | Adhesive or a supplier-approved solvent process for the named sheet grade. Do not assume a solvent-bonded edge retains sheet impact strength. | PC grade/coating, joint geometry, adhesive or solvent TDS/SDS, optical and impact criteria, controlled coupon after full cure. |
| PC to metal or another plastic | A grade-approved adhesive, tape or mechanical detail that handles differential movement; compare rigid and flexible candidates against the actual load. | Both substrates and surface finishes, temperature span, loading direction, adhesive supplier compatibility and aging plan. |
| Water/weather seal around a PC panel | A sealant specified for the particular PC face and adjoining frame. Separate the seal from the structural retention design. | Sealant maker’s PC/coating approval, primer rule, joint movement, water/UV/cleaner exposure and service criteria. |
Plaskolite’s TUFFAK fabrication guide, “Bonding Applications” (pp. 50–52) lists urethane, epoxy, UV-cured adhesives, silicone, tapes and other systems as broad families, and warns that some adhesives can be aggressive toward its sheet. It also notes that a solvent-bonded joint can be brittle with reduced impact strength. These are TUFFAK guide examples, not a SinoPlastix approval for every PC grade, coating or adhesive formulation. Confirm the current sheet and adhesive documents for the actual order.
Run a coupon that matches the real part
- Record the inputs: sheet grade, thickness, extrusion direction if relevant, coating/UV face, mating material, cut-edge condition, drawing revision and adhesive lot.
- Prepare as production will: use the sheet supplier’s permitted cleaning method; control joint fit, overlap or gap, masking removal, fixture pressure and bondline. Include a stressed or machined-edge sample when that condition exists in the product.
- Follow the candidate adhesive’s TDS: mix/application, open time, clamping, ventilation, temperature and full cure. Record actual conditions; do not copy another chemistry’s schedule.
- Inspect against the job: appearance, bubbles/crazing, adhesion and failure mode, then repeat after the expected heat, humidity, UV, cleaner or load exposure. The purchaser and responsible engineer define acceptance limits before testing.
Use one row per coupon: PC grade and thickness | mating substrate | surface preparation | adhesive product and lot | joint geometry | cure conditions | exposure | acceptance limit | actual result and photo | approver. A passing coupon applies to that recorded combination, not every future grade or environment.
Send a bond-ready PC inquiry
SinoPlastix can review custom PC sheet and fabrication against your drawing. We can provide common PC material report originals through sales on request; they do not replace an adhesive manufacturer’s compatibility statement or a project-specific joint test. Price and lead time are confirmed in the written quotation for the actual complexity and quantity. Edit the brief, click Copy brief, then open the quote form and paste it into the message field.
Common questions
What glue works on polycarbonate?
There is no universal glue. Start with the exact PC grade, coating, mating substrate, load and service conditions; shortlist only adhesive products whose current technical literature covers that combination, then approve a production-like coupon after full cure.
Can I solvent-bond polycarbonate?
Some named PC grades can be solvent-bonded under their manufacturer’s guide, but the resulting joint may be brittle and have reduced impact resistance. Do not apply another grade’s solvent recipe to a coated or stressed part without its supplier’s approval and a controlled coupon.
Is silicone enough to hold a PC panel?
A silicone system may be considered for a compatible seal or flexible joint, but chemistry and product formulation matter. A seal is not automatically a structural retainer; the selected system’s supplier and the responsible engineer must approve its role.