LA-CO Markal BLOC-IT Heat Absorbing Paste effectively absorbs surface heat, protecting a variety of materials from heat damage. Use BLOC-IT safely on rubber, plastic, painted and finished surfaces during soldering, brazing, or welding and during valve installation or repair. BLOC-IT is safe to use; it's non-toxic, contains no asbestos, and is odorless and easy to clean. Simply wipe off with cloth or wash with water - it leaves no stains behind.
*Comes in a 10 oz. tube.