Crystal Serum Light (CSL)
Crystal Serum Light (CSL) is the enthusiast’s ticket to pro-level paint protection, packing up to 80% of the performance of Gtechniq’s legendary Crystal Serum. The original pro-only formula is so hardcore that it requires machine polishing with 1,500-grit sandpaper to remove if applied incorrectly, but CSL brings that extreme tech into the hands of skilled DIYers. It brings the gloss like crazy, shrugs off swirl marks, and keeps contaminants from bonding to your paint. If you’re chasing that deep, glassy shine and unbeatable durability without handing over your keys to a detail shop, CSL delivers the goods.
Why You’ll Love It:
- Brings out a rich, liquid-like shine that turns heads
- Helps your paint stay cleaner between washes
- Adds a smooth, glassy feel you can actually feel
- Gives weekend detailers a serious edge
- Levels up your paint game without needing a studio setup
- Stands strong against the elements, road grime, and everyday abuse
- Lets you flex high-performance protection with confidence
What’s Included:
- 30ml or 50ml Crystal Serum Light
- Lint-free applicator pad
- Dropper
- Application instructions
- Gtechniq sticker
How to Use
- Make sure your car is indoors and will stay there for at least 12 hours after application
- Do not apply in direct sunlight and only work between 5°C and 25°C
- Shake the bottle well and wear gloves throughout the process
- Wash and decontaminate your paint thoroughly, and polish if needed to remove imperfections
- Wipe each panel with Panel Wipe using a clean microfiber cloth, working in small sections
- Fill the applicator pad with 3 full pipette measures of CSL and work it in evenly
- Close the bottle and set it aside to avoid premature curing from hand heat
- Apply CSL in overlapping strokes to a 2ft by 2ft area or follow the natural body lines
- Wipe off residue immediately using a microfiber cloth, gently buffing if needed
- Use two cloths and rotate them often to prevent CSL from curing in the fibers
- Check your work with a bright, diffused light to ensure no residue is left behind
- If any residue cures fully, polish that spot and reapply CSL
- After application, soak your used cloths in water and wash them as soon as possible
- Wait about 2 hours before applying EXO or C2 on top
- Store CSL in a cool, dry place
- Use within 3 months of opening for best results
Safety Information
Warranty
Within 30 days from purchase: TRC will replace items damaged in shipping upon inspection of photos. Opened, used, or partially used products excluded, as well as any degradation from storage or environmental exposure; customer dissatisfaction with scent, color, or consistency; misuse.
After 30 days: no warranty applies.
Note: No manufacturer warranty is provided beyond shipping damage replacement. No guarantees are made for product longevity, performance, or fitness for a particular purpose.









