1 PT HI-TEMP FOAM OUT P/N: 87121 Foam Reducer CONTROLS SPA WATER FOAMING Whenever you are troubled with spa water foaming HI-TEMP SPA FOAM OUT will quickly and efficiently end the foaming problem. Just a very small squirt will end most foaming in the average spa. HI-TEMP SPA FOAM OUT can be used in all spas with fiberglass, vinyl, acrylic, Rovel, or plastered surfaces and can be reapplied as often as necessary.