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  • Starbrite Sea Safe Non-Toxic Anti-Freeze, -100F

Starbrite Sea Safe Non-Toxic Anti-Freeze, -100F

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Star brite® -100°F (-73°C) Non-Toxic Antifreeze provides the ultimate in extreme cold weather and corrosion protection for drinking water systems and all engines. Its premium additive package prevents corrosion of aluminum, copper, brass and solder, but will not harm rubber, seals or hose materials. The 3X-died blue-green color provides excellent blow-through visibility. Formulated with virgin, non-toxic USP-grade ingredients. It contains no alcohols. This product is ready-to-use or may be diluted – please follow label directions for dilution ratios.

Star brite® -100°F (-73°C) Non-Toxic Antifreeze will provide burst protection to -100°F (-73°C) and freeze protection within a range of -58°F to -63°F (-50°C to -52°C). When testing with a refractometer or hydrometer designed for use with propylene glycol, freeze point readings on the PG scale will range from -58°F to -63°F.  Note: The burst point of PVC pipes used in most drinking water systems is about -10°F (-23°C). When winterizing water systems in regions where temperatures can fall below -10°F (-23°C), we recommend using Star brite® -100°F (-73°C) Non-Toxic Antifreeze.


  • Protects water systems & engines from freeze ups during storage.
  • Use in boats, RVs, vacation homes, pools.
  • Safe for copper, brass and all types of plastic.
  • Contains corrosion inhibitors to protect all metal engine components and seals.
  • The most effective and safest way to protect all marine engines from freeze-up damage during winter storage.

                         AntiFreeze Dilution Chart

2 Pts Solution / 1 Pt   Water
Item Copper Burst PVC Burst Freeze Protection Copper Burst PVC Burst Freeze Protection
Wintertech -50°F -10°F +17F n/a n/a n/a
-50 -50°F -10°F +12°F n/a n/a n/a
-100 -100°F -80°F -60°F -72°F -50°F -6°F
-200 -200°F -150°F -100°F -120°F -90°F -80°F
   1 Pt Solution / 1 Pt   Water 1 Pt Solution / 2 Pts   Water
Item Copper Burst PVC Burst Freeze Protection Copper Burst PVC Burst Freeze Protection
Wintertech n/a n/a n/a n/a n/a n/a
-50 n/a n/a n/a n/a n/a n/a
-100 -54°F -20°F +9°F n/a n/a n/a
-200 -86°F -66°F -28°F -62°F -30°F +5°F


For 40 years, Star brite has been the industry leader in Winterization products for boats, RVs and all other engines and systems that need to be protected from extreme low temperatures.  The antifreezes are formulated to be non-toxic and  biodegradable, as well as dyed in bright, readily identifiable colors to allow for easy blow-through visibility. Alcohol-free, the -50ºF, -100ºF and -200ºF formulas provide superior copper and PVC burst protection combined with anti-corrosive agents. Fuel stabilizers keep fuel fresh during seasonal storage while Star brite Fogging Oil protects the engine during long-term layups. 

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