CLEAN ‘UNCLEANABLE’ OPTICS AND PRECISION SURFACES WITH FIRST CONTACT POLYMER™! Safe**. Accepted. No residue. **Always test and become proficient on non-critical surfaces first. ** Dirty Optics and precision surfaces are no longer an unfortunate fact of life. First Contact polymer solution safely cleans all optical surfaces and removes 100% of dust, fingerprints and other undesirables. Please note that we have a $50USD minimum order. Shipping and handling, will always be added and may be different than that appearing in your basket for orders that contain 500mL or 1000mL First Contact Solutions(flammable liquids). NOT for use on certain plastic (polycarbonate or acrylic) eyeglasses or similar plastic lenses! Some gold and silver mirrors have poor adhesion! Of course, on one of a kind or high value systems, be sure to try some test samples first! **Certain coatings are inherently poor adhesion, especially if done without effective substrate preparation. Be careful of gold and silver coatings. That being said, we and our customers have successfully protected and clean lots of gold and silver mirrors and gratings including those on the WM Keck Telescope and the Gemini North Silver! We have found no correlation with mirror price and adhesion, in fact, the opposite seems sometimes true! While we routinely clean diffraction gratings, the old adage about gratings still holds-don't touch them unless you have to!**