Check the listing for details. Laguna Silicone Lubricant - PT595. Condition: New. Listed at 7.69 USD. Laguna Silicone Lubricant (Item #: PT-595) is a valuable addition to your pond maintenance toolkit. Here’s what you need to know: Purpose: This lubricant is specifically designed to prolong the overall life of your filter by ensuring smooth operation and preventing wear and tear on critical components.Application Areas:Rubber O-rings: Regularly apply the silicone lubricant to rubber O-rings to maintain their flexibility and prevent leaks.Gaskets and Seal Rings: Keep gaskets and seal rings in optimal condition by applying the lubricant. Extend the lifespan with consistent lubrication. Maintenance Tip:If you suspect a leak from the O-ring, try cleaning it with warm water and wiping the receiving groove in the filter or click fit.Apply Laguna silicone lubricant to the O-ring for optimal performance.Remember, a well-maintained filter ensures a healthier aquatic environment for your fish and plants and pond.