Pratley Pratlok Grade PEN (50 Grams) by Pratley Save Liquid error (product-badge line 32): Computation results to '-Infinity'% $12.50 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Medium Strength (Yellow lid) Ultra low viscosity thread locker for "wicking into pre-assembled fasteners, press fits and knurls Also suitable for sealing micro porosity in welds and castings 50 Grams Information Leaflet Safety Data Sheet