*Does not work on PTFE (Teflon)
If primer pen appears dry, test by drawing a line on a piece of paper, a wet mark should be evident.
If using on leather or clear plastic, test on an inconspicuous area first as adhesive may discolour or cause leather to harden.
Best results for nylon items (e.g. small car parts), PVC and polystyrene are achieved without priming. Contact Selleys Consumer Advice if unsure on plastic type.
Do not use primer on non-plastic surfaces.